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Truth in Labeling
By Diane Stanton
Do you or don't you read food labels when you shop? If you don't,
you're missing out on a prime source of information about your meals.
If you want control of your health, focus on package labels and
pick your foods carefully.
The large print on food labels focus on what are called macronutrients:
carbohydrates, fat and protein. Some of the smaller categories convey
information about vitamins, fiber, and minerals, as well as the
totals of fat and saturated fat contained in food. So, you have
no excuse for claiming ignorance about your diet: the truth is in
the labels.
Food labels can be confusing to the uninitiated.
Go into a big food store and you can be faced with what seems to
be a forest of food information: more than 15,000 labels. Add to
that fact that every year more than 30,000 new food products can
be introduced to the marketplace, and what you're faced with is
a jungle of food labels.
That overwhelming wealth of food label information doesn't mean
you should throw up your hands in dismay and give up reading and
deciphering labels. You should arm yourself against that sea of
labels with knowledge and, by understanding them, end your confusion
and build your health.
Label History
A hundred years or so ago, food labels were only required to list
the name of the food contained inside the package. The contents,
quality and processes used to make the food were often a mystery.
Little or no disclosure to consumers was made about how their food
was created.
By the early 1920s, the federal government, via the Food and Drug
Administration (FDA), began requiring food companies to list the
net weight of food on labels as well as the names and addresses
of food processors and distributors.
Finally, by the 1970s, listing basic nutritional information was
mandated in a uniform way so that shoppers could have some basis
for comparing foods.
Then, in 1990, the Nutrition Labeling and Education Act made major
alterations to the kinds of labels that had to be included on food
packages.
The FDA and the US Department of Agriculture (USDA) required significant
changes to food labels that were supposed to make it easier for
consumers to eat healthier diets.
The labels requirements of 1994 included five major changes:
* The nutrition information on the label had to be printed in larger,
more legible type.
* This condensed information had to be on the back or side of food
packaging and titled as "Nutrition Facts." This type of
information is also shown in grocery stores near the fresh food
displays of fish, fruits and vegetables.
* The label had to include a column of information tagged as the
"% Daily Value," designed to help consumers understand
how the food could fit into a healthy diet.
* Each label had to include information about fat, cholesterol,
fiber, sugar, calories from fat, and other information relevant
to designing a healthy diet.
* The computed serving sizes were supposed to be more realistic
and reflect the amount of food people actually eat at one sitting.
Label Questions
Consumer questions regarding food labels have led researchers to
look into ways to help shoppers comprehend what food labels tell
them. These studies are designed to help consumers match up their
nutrition requirements with the foods they buy.
For instance, at the University of Illinois at Urbana-Champaign,
scientists have devised a label tool called See It, Do It, Teach
It to help people improve their diets through comprehension of food
label information.
"One of the goals of the project was to help
teenaged
girls and menopausal women understand how they can get the daily
requirement for calcium into their diet in order to help prevent
osteoporosis," says Karen Chapman-Novakofski, PhD, associate
professor and nutritionist in the school's College of Agricultural,
Consumer and Environmental Sciences.
According to the See It, Do It, Teach It program, you should think
of food labels as consisting of two sections:
* Food items you should limit: total fat, saturated fat, cholesterol,
sodium and, if you're eating a low-carb diet, total carbohydrates
* What you may need to increase: vitamin A, vitamin C, calcium and
iron
"Much more attention has been paid to what people should limit
rather than the nutrients needed. The average consumer doesn't know,
for instance, how much vitamin A 10% of the Daily Value is, or how
much calcium 25% of the Daily Value is," Dr. Chapman-Novakofski
says.
Upping Calcium Intake
In their eight-week study of people's calcium consumption (Journal
of Nutrition Education and Behavior 4/04), the University of Illinois
research team found that people didn't know how much calcium was
in the food they ate.
After the initial part of the study, in which participants were
shown how to look for calcium on labels, "the post-test revealed
that the participants significantly increased their calcium intake
to 821 mg per day, up from 372 mg per day," notes Dr. Chapman-Novakofski.
"That's a lot closer to the daily requirements of 1,200 mg
per day for men and women over 50, 1,000 mg for men and women aged
19 through 50 and 1,300 mg per day for [youths aged] 9 to [18] years,"
she adds.
Parts of the Label
The first item at the top of a nutrition food label tells you the
portion size that the label measures.
An important point to remember: these sizes are determined individually
by each manufacturer. Consequently, all of the other values on the
label are measured per portion.
So, if you are comparing foods made by two different companies that
employ very different portion sizes in their nutritional calculations,
your label comparisons may be complicated.
Another fact to be aware of: the listed portion size may be an odd
division of the food within the container and not reflect a common-sense
division. For instance, some food packages are labeled as containing
2.5 portions.
And, to make things even more interesting, small boxes of candy
that you might think contain barely enough for one helping may be
labeled by the manufacturer as having two or more portions. As a
result, if you eat the whole box, you often have to at least double
the number of indicated calories, etc. to figure out the nutrients
and calories you are consuming.
The section of the label that notes calories, calories from fat
and percent daily values is listed under the portion size. Here
you are told how many calories you consume when you devour one portion
and how many of those calories are derived from fat.
This label focus on fat originated when consumers and dietitians
were very concerned about Americans' fat consumption and hadn't
yet switched their focus to carbohydrate consumption as a prevalent
dietary health priority.
Also included on the label: the daily value percentages aimed at
showing you how much out of a total day's intake of various nutrients
a portion bestows upon you.
These percentage numbers are based on a theoretical analysis of
a diet that contains 2,000 or 2,500 calories a day. (A notation
at the bottom of the label tells you whether the calculation is
based on 2,000 or 2,500.)
Carb Facts
If you've been eating a low-carb diet (or are planning this type
of diet), the section of the label that lists carbohydrates may
be especially useful.
Under this heading, the label lists the totals for fiber and sugar.
No matter what diet you are on, dietary fiber is desirable, since
it represents indigestible carbohydrates that both pass through
you without conveying any calories and keep beneficial bacteria
in your digestive tract healthy.
Most people want to limit their sugar totals, however, since this
nutrient may raise your risk of being overweight and, when you eat
a lot of it, may contribute to immune problems.
Interestingly enough, when food chemists compute what is in food,
they perform lab tests known as assays to distinguish its ingredients.
(The manner in which these tests are performed are very strictly
regulated by the FDA.)
In fact, just about every nutrient listed on a food label is determined
by laboratory test except for the carbohydrate content: the amount
of water, fat, crude protein and ash are determined this way.
But the total carbs are computed by simply subtracting the total
of the other ingredients from the total amount of food, a kind of
process of elimination.
So while fat and protein are measured with precise lab tests, carbohydrate
totals are figured by the leftovers. (The water and ash, by the
way, are not usually listed on food labels.)
Within the general carbohydrate group, are several categories of
carbohydrates that produce very different effects in your body.
These categories can be divided into sugar, sugar alcohols, dietary
fiber and a collection of various chemicals that include organic
acids, flavonoids, gums, lignans and others.
According to the FDA, the food label only has to list the total
carbs, sugar and dietary fiber.
But some food companies now list things like sugar alcohols.
Blood Sugar Effects
Not all of these types of carbohydrates behave the same way in your
body.
For example, when your body digests table sugar, it turns immediately
into blood sugar. So sugar and most other carbohydrate is what we
call "digestible carbohydrate." Other carbs, such as sugar
alcohol or glycerine, can be digested but do not turn to blood sugar.
Still others, such as dietary fiber, are indigestible and pass through
your body without impacting your blood sugar level.
To date, the FDA has not focused on these important biochemical
differences and treats all carbohydrates alike. This means that
when you look at a food label, you do not see a number for the carbs
that impact your blood sugar level. To do so, simply subtract the
number of grams of fiber from the total number of carbohydrate grams.
Net Carbs
Recently, the phrases "low carb," "net carb"
and "impact carbs" have begun to appear on food labels.
These are not defined by the FDA; they were put on labels by by
companies to help consumers pick out foods that are acceptable on
low-carb diets.
To arrive at the total of net carbs, food companies subtract the
total amount of fiber and sugar alcohol from the total carbohydrates.
Fiber Calculations
Since the body cannot digest fiber, this nutrient (which is still
important for good health) is not calculated into the total amount
of carbohydrates.
As for sugar alcohols, while-technically speaking-these are carbs
and they do have calories, they have little effect on blood sugar
and usually are not counted in total carbohydrates.
According to the American Dietetic Association, people with diabetes
who are managing their blood sugars using the carbohydrate counting
method should "count half of the grams of sugar alcohol as
carbohydrates since half of the sugar alcohol on average is digested.
"Fiber is not digested, however. If the serving of food has
more then 5 grams of fiber one should subtract the grams of fiber
from the total carbohydrate grams."
As you can see, when it comes to food, as in most things, knowledge
is power.
If you want power over your health, you need power over the food
you eat. The road to that power is by reading food labels. What's
in the food you're eating every day may surprise you.
Nutritional Scorecard
By Sylvia Whitefeather
For over 50 years, the federal government has produced Recommended
Daily Allowances (RDAs) as guidelines for vitamin and mineral intake.
Then, in 1993, the Reference Daily Intakes (RDIs) superseded the
RDAs.
By applying this new designation, the government's guidelines are
now supposed to represent the designated amounts that an average
person should consume. With this in mind, and the fact that many
experts think you should consume more than some of the RDIs, how
does your nutritional scorecard add up? Answering a few nutritional
questions can point you in the right direction.
Perfect Protein
Are you trying to lose weight?
If you are, the latest thinking on weight loss opines that eating
more protein may be the key to keeping your weight down. Two recent
studies published in the Annals of Internal Medicine (5/18/04) found
that people who ate a low-carbohydrate, high-protein diet lost more
weight and had better cholesterol levels than dieters who ate fewer
fatty foods. Both studies found that a low-carb diet can improve
your triglycerides (blood fats) and boost your HDL, or good, cholesterol.
Eating protein satisfies both tummies and taste buds. Researchers
have found that the amount of protein eaten in a meal determines
not only how much food you eat but also how satisfied you feel after
eating (J Nutr 2004 Apr; 134(4):974S-9S). And when you feel satisfied
after eating less food you improve your odds of losing weight.
We need about 50 grams of protein a day to support the body's functions.
The best sources of protein are eggs, meat, milk, protein shakes
and yogurt.
Classy Carbohydrates
Does your energy level go up and down during the day?
To get off the energy rollercoaster, cut down on carbohydrates,
and make sure the carbs you do eat are complex.
Carbohydrates have been getting some unflattering press lately.
Yes, if you want to lose weight, you may want to go on a strictly
low-carb diet. But for those not concerned with weight, carbohydrates
are the principle source of energy for the body.
What's more, even if you do restrict carbohydrates, you should still
eat a tiny bit of them. Without some carbs in the diet your body
cannot regulate protein or fat metabolism. According to Michael
and Mary Eades, MD, authors of The 30-Day Low-Carb Diet Solution
(Wiley), "Carbohydrates control insulin and insulin controls
your metabolic health."
So, make your carbohydrates count. Indulge in complex carbohydrates:
whole grains, fruits and vegetables. In those foods, carbs are accompanied
by fiber and larger amounts of vitamins and phytonutrients. Other
reliable sources of complex carbohydrates are whole wheat bread,
brown rice and oatmeal.
Fabulous Fiber
Are you concerned about your heart health?
Fiber from beans, oats, legumes, nuts, rice bran, fruits and vegetables
helps stabilize blood sugar and reduce cholesterol. Pectins, found
in apples, pears, prunes and plums, are a particularly useful form
of water-soluble fiber.
Insoluble fiber, in cereals, wheat bran and vegetables, reduces
the risk of colon-related problems. In addition to adding fiber
to the diet, dried beans and soybeans have been shown to lower cholesterol,
improve vascular health and kidney functioning, preserve bone mineral
density and reduce menopausal discomforts (AJCN 1999 Sept; 70(3
suppl):464S-74S). Fiber also promotes good bowel health and encourages
the growth of beneficial intestinal flora.
You need 25 to 40 grams of fiber daily. If you have cut back on
your carbohydrates, be sure to take a reliable fiber supplement.
Fantastic Fats
Do you have problems focusing on mentally challenging tasks?
If so, you should eat more fish and get more of the omega-3 fatty
acids that fish and flax contain. Higher levels of this type of
fat have been linked to better concentration while performing demanding
intellectual work (Lipids 2004 Feb; 39(2):117-23).
Fats add flavor to food, making meals taste better. Monounsaturated
fats like plain olive oil and canola are liquid at room temperature
and are suitable for use in cooking at high temperatures. Researchers
have found that a diet high in monounsaturated fat has the ability
to decrease LDL (bad) cholesterol (J Nutr 2001; 131:
1758-63). Other fats, such as extra virgin olive oil and flaxseed
oil, are best used in dishes that don't need cooking, such as salads.
Although the RDI for fat is less than 30% of the total calorie intake,
some researchers believe that if you eat healthy fat, eating too
much is not a concern. Omega-3 fats are available in supplement
form.
Wonderful Water
Do you suffer from dry skin?
You may not be drinking enough water. This precious liquid is used
by every cell of our bodies and makes up 60% to 75% of our body
weight.
Water is important for kidney function. Researchers in Italy found
that drinking adequate amounts of water can help prevent the formation
of kidney stones (Urol Int 2004; 72 Suppl 1:29-33).
Your activity level, environment and diet influence how much water
you need daily. Try to drink at least eight cups of fluid a day
from noncaffeinated, nonalcoholic sources.
Voluptuous Vitamins
Do you exercise frequently?
If you do, you need more antioxidant vitamins like natural vitamin
E and vitamin C as well as a healthy supply of carotenoids. A study
at the School of Applied Medical Sciences and Sports Studies, University
of Ulster, found that exercisers need more antioxidants. Otherwise,
their exertion may release an excess number of free radicals (caustic
molecules) in their bodies and do damage to the heart arteries and
other internal organs.
Vitamins, in general, are defined as micronutrients that are necessary
for life. They are necessary for the production of energy, a healthy
immune system and hundreds of other functions in the body.
Vitamins aren't the only substances that produce big benefits in
small quantities. Phytonutrients are chemicals in plants that have
health-promoting properties. These nutrients are getting more and
more attention from researchers who are keeping score on our nutritional
requirements.
Mineral Crunch
Do your meals contain plenty of calcium?
If not, you may need supplements to keep your bones strong and help
keep your weight down. One study, presented at the Experimental
Biology 2003 meeting in San Diego, found that young women who consumed
more calcium had better luck controlling their weight. In this research,
it didn't take much calcium to make a difference in waistlines.
Consuming just one more serving daily (a cup of milk or a thumb-sized
piece of cheese, each of which contain about 300 mg of calcium)
made, on average, about a two-pound difference.
In addition, many experts recommend multimineral supplements (along
with multivitamins) to promote better health. A recent study of
people with immune problems, for instance, found that those kinds
of supplements seem to help boost the immune system (AT News 2004
Feb 27; 398:4-5).
Herbs in Perspective
By Phyllis D. Light, RH-AHG
"I don't claim a cure...I just try to give people some ease,"
noted Tommie Bass, a traditional Southern herbalist whose life has
been the topic of several books, including Mountain Medicine by
Darryl Patton (Natural Reader Press) and Trying to Give Ease by
John Crellin and Jane Philpott (Duke University Press). That philosophy
reflects the perspective embraced by herbalists for eons.
The traditional use of herbs is incorporated into all cultures.
Herbs were the first medicine and the origin of what we now call
modern medicine. These plants have not been prescribed to conquer
specific illnesses but instead nourish the body and aid in building
overall health.
Traditional Knowledge
Observation, psychological need and human instinct form the foundation
of traditional herbal knowledge and use. This knowledge has been
passed down through generations based on practice and experience.
The result: a depth of information about the safe and effective
use of herbs that spans thousands of years.
The goal of a traditional herbalist is to bring the body into balance
(homeostasis), prevent disease and support immune functioning. Unfortunately,
any kind of therapeutic knowledge can be misused, and that has happened
with some herbs, causing some people to question herbal medicine's
safety.
As more people turn to natural therapies, scientists have begun
to perform evidence-based research into their safe and effective
use. The good news is that much of this research has validated the
effectiveness of herbs and supplements.
Echinacea to the Rescue
Do the sniffling sneezes that herald a cold have you reaching for
your bottle of echinacea? If so, you are in good company. Echinacea
(Echinacea spp) is one of the top-selling herbs.
The colorful American prairie plant was extremely popular during
the early 1900s, until the use of modern antibiotics relegated it
to the back shelf. But a resurgence of interest in herbs propelled
echinacea back into the mainstream in the second half of the twentieth
century. And this herb boasts an impressive body of research and
has an excellent record of safety.
For instance, researchers at Virginia Commonwealth University School
of Pharmacy have found echinacea to be effective in supporting the
body's defenses against upper respiratory tract infections and for
reducing the duration of discomforts that accompany the common cold
(Pharmacotherapy 2000; 20(6):690-7).
Although studies have not confirmed its ability to prevent colds,
echinacea is widely used by many folks for just that purpose. Researchers
have found that echinacea's effectiveness may drop if you use it
for eight straight weeks (Am J Health-Syst Pharm 1999; 56(2):121-2).
So if you take it for a couple of months, take a couple of weeks
off before using it again.
Flower Power
St. John's wort is another herb with ancient origins that has experienced
a modern resurgence.
Named after St. John the Baptist, St. John's wort (Hypericum perforatum)
is generally in bright yellow bloom around St. John's Day (June
26). According to herbalist Michael Tierra, author of The Way of
Herbs (Pocket Books), St. John's wort affects the liver and the
nervous system. In 1984, the German Commission E, a recognized herbal
authority, approved St. John's for depressive disorders, and in
topical form for acute injuries and first-degree burns.
Modern research has reaffirmed the use of St. John's wort in the
short-term treatment of mild to moderate depression (Cochrane Review
Issue 2, 2004). It has also been found to be useful in premenstrual
depression (Int J Psy Med 2003; 33(3):295-7). (Researchers have
found that the herb may alter how the body processes some prescription
medications, so check with your healthcare provider before using
such medicines along with St. John's wort.)
King of Herbs
"Ginseng (Panax) received the lofty title, King of Herbs, due
to its reputation as a tonic and its ability to stimulate the body
into healing," notes herbalism writer Darryl Patton. This plant
was once so popular in China that it was worth its weight in gold.
In fact, ginseng is the popular name for two different types of
ginseng, American and Korean (Panax quinquefolium and P. ginseng).
Both are considered adaptogens, or substances that help the body
deal with stress more effectively. And modern research has found
that ginseng can be used to improve overall energy and vitality,
and to help the body deal more effectively with chronic stress (J
Pharm Sci 2003 Dec: 93(4):458-64).
Researchers have found that ginseng helps boost the immune system
(J Med Food 2004 Spring; 7(1):1-6). This ancient herb is also a
powerful antioxidant that confers protection on the heart (Biochem
Biophys Acta 2004 Feb 24; 1670(3):165-71). In other studies, ginseng
has been found to reduce symptoms of menopause, improve endurance
and lower blood sugar levels.
To avoid overharvesting wild ginseng, most of the herb on the market
is now grown on farms.
Ode to Ginkgo
Known as the Living Fossil, ginkgo is the oldest known plant in
the world. A native of Asia, ginkgo (Ginkgo biloba) is now found
in many US cities, where it has been planted as a quick-growing
shade tree. Traditionally, ginkgo was used for disorders and diseases
of the lungs and the kidneys, as a remedy for bronchitis and to
improve circulation in older people.
Ginkgo contains substances that act as potent antioxidants by scavenging
cell-damaging free radicals, and it is thought to help reduce the
risk of disease. By opening capillaries, ginkgo increases circulation,
and enables nutrients and oxygen to move around the body, especially
to the extremities.
Indeed, recent research indicates that ginkgo may ease pain associated
with arterial disease in the legs (Am J Med 2000; 108:276-81). Other
studies support the use of ginkgo for acute stress (J Pharm Sci
2003 Dec; 93(4):458-64) and some cases of hearing loss (Acta Otolaryngol
2001; 121:579-84).
In a UCLA Neuropsychiatric Institute study on ginkgo, researchers
found significant improvement in the verbal recall of people who
had age-related memory problems. According to Dr. Linda Ercoli,
lead author of the study, "Our findings suggest intriguing
avenues for future study
with a larger sample to better measure
and understand the impact of ginkgo on brain metabolism."
Tasty Ginger
Traditionally, fiery ginger (Zingiber officinale) has been used
to aid digestion, reduce nausea, relieve gas, reduce symptoms of
arthritis and strengthen the heart. Modern researchers have started
to validate these traditional uses; ginger has reduced the nausea
and vomiting of morning sickness in studies (Aust NZJ Obstet Gynaecol
2003 Apr; 4392:139-44).
Meanwhile, researchers at the University of Minnesota have applied
for a patent on a substance found in ginger, believing it to have
anticancer activity. According to Ann Bode, "Plants of the
ginger family have been credited with therapeutic and preventive
powers and have been reported to have anticancer activity."
Ginger can be found in natural food stores as fresh or dried root.
It often appears in small amounts in herbal formulas as a carrier
herb-one that helps move other herbs around the body.
The best medicine combines the health support of herbs with the
scientific rigor of conventional medicine. And as scientists continue
to search for new medicine from ancient remedies, we can enjoy the
best of both perspectives.
Good Hydration
By Lisa James
Ah summertime, and the living is lovely: ocean fragrances wafting
on a summer wind, the summer sun warming the body and relaxing the
mind. But all that sun and wind can dry your summer skin, making
it uncomfortable and parched-looking.
Moisture counteracts the discomforts that summer elements can bring,
allowing your fresh, dewy look to shine through. Knowing how to
hydrate your skin is the key.
Skin Structure
Skin consists of three layers, each with a different function:
* The deepest layer, the subcutaneous tissue, contains the fat cells
that help hold in body heat and protect the vital organs, and that
serve as an energy reserve.
* The middle layer, or dermis, is the thickest of the three layers.
It is rich in nerve endings, blood vessels, sweat glands and hair
follicles. The dermis also holds the oil glands that keep the skin
properly lubricated and impervious to water. Two proteins, collagen
and elastin, found in the dermis support the skin's top layer and
provide shape, tone and flexibility.
* The topmost skin layer, the epidermis, protects the body against
the outside world. It contains melanocytes, pigment-bearing cells
that determine skin color and help guard against sun damage. The
epidermis is also equipped with immune cells that guard the body
against foreign substances.
The epidermis is further divided into five separate sublayers. Cells
are formed at the basal cell layer on the bottom; they then push
their way upward until they reach the surface, called the stratum
corneum, in a process that takes roughly 28 days.
As the skin cells mature, they produce a tough protein called keratin,
which also forms the structure of hair and nails.
Natural Moisturizers
Do you have dry skin? How well your skin holds moisture depends
on the arrangement of cells within the stratum corneum.
Fat contained in this layer, as well as natural moisturizing factor
(made by the epidermis), also keeps skin moist. Unfortunately, as
you age, the amount of natural moisturizing factor produced by your
skin decreases.
Skin Care 101
Obviously, anything that affects the all-important epidermis can
dry out your skin-sun and wind both rob skin of moisture.
For starters, just say no to tobacco.
Smoking tightens the skin's abundant blood vessels; this reduces
the flow of oxygen and nutrients, creating dryness. Smoking also
breaks down elastin, the protein that gives skin its flexibility.
The next step is to add water from within.
"It takes at least six to eight cups of pure water each day
to keep the skin and body well hydrated," notes Jeanette Jacknin,
MD, board-certified dermatologist and author of Smart Medicine for
Your Skin (Avery/Penguin).
Bathtime Tips
At the same time, be careful about how you bathe your skin.
Bathing or showering for too long, or using water that's too hot,
can actually cause your skin to lose moisture for two reasons. First,
prolonged bathing washes away the oils that help lock moisture in;
second, it encourages your skin's own moisture to evaporate after
you dry yourself off.
Before you shower or bathe, Dr. Jacknin recommends using a dry,
soft-bristled brush to increase skin circulation and gently remove
dead cells. Brushing in small circles, gradually move up your legs
and arms, always moving towards the heart.
When you do get into the tub or shower, don't scrub your skin and
don't use harsh cleaning agents. Instead, go for natural cleansers
that feature such skin-friendly ingredients as glycerin.
Feed Your Inner Skin
As your body's largest organ, your skin depends on the nutrients
in your diet. You have to feed your skin well if you expect it to
stand up to wind and sun.
"Eat fish, rolled oats and ground flaxseeds frequently,"
recommends Dr. Jacknin. "These foods are high in omega-3 fatty
acids, which help the skin retain moisture." Include other
healthy oils, such as safflower and olive oil, in your meals. Supplemental
omega-3s, in the form of flaxseed or fish oils, can also help.
Supplemental Skin
Various vitamins help make your skin happy and healthy.
Skin growth and repair requires vitamin A, while natural vitamin
E provides antioxidant protection and vitamin C promotes creation
of collagen, which provides skin with its structure.
The B vitamins are essential to keeping dryness at bay; without
them, the skin can crack, peel and redden. Choline, a member of
the B family that helps with fat transportation within the body,
is available as lecithin.
Methylsulfonylmethane (MSM) is another skin-friendly nutrient. MSM
provides sulfur, which the body needs to create healthy skin proteins.
It also fights inflammation and encourages better blood flow.
Slake Your Skin's Thirst
A good moisturizer can help arid skin return to soft freshness.
To get the most out of moisturizers, use them consistently, and
start at a young age.
"[M]ost people start to benefit from [moisturizers] in their
twenties [when] their skin begins to dry with age," state Charles
Inlander and Janet Worsley Norwood in Skin: Head-to-Toe Tips for
Health and Beauty (Walker and Company). "Moisturizers boost
skin health by preventing water loss from the skin."
The same antioxidant nutrients, such as vitamin C and natural vitamin
E, you feed your skin from within also abound in natural moisturizers,
as do an impressive variety of herbal essences and essential oils.
Aloe vera, used to treat burns for centuries, helps ease inflammation,
as does chamomile. Fresh-smelling lavender oil helps soothe insect
bites and minor wounds. Jasmine and peppermint offset excessive
oil production.
Moisturizers: Timing and Type
The ideal time to moisturize is right after a bath or shower, since
that's when evaporation promotes water loss; for best results, apply
while your skin is still slightly damp.
But bathtime isn't the only time to consider your skin's moisture
needs. Carry some moisturizer with you so you can use it every time
you wash your hands, especially if you're prone to cracked cuticles
and split fingertips.
Match your moisturizer to your skin type. If your skin tends to
oiliness, use a water-based product; otherwise, an oil-based formulation
-jojoba oil and shea butter are good choices-is fine. (Oily skin
may first need a gentle astringent like lemon peel or cucumber to
remove dirt and excess oil.)
Also pay careful attention to the type of moisturizer you use. Lotions
are easy to apply, but may not stay on your skin as readily as creams,
which may be a better choice for your face, feet and hands.
By all means, enjoy the summer sun. Just make sure your skin enjoys
the summer, too, by staying hydrated and happy.
Summer Sports Nutrition
Guide
By Joyce Dewon
If you're hooked on exercise you're probably just as hooked on
using top-notch equipment when you work out. Those who are serious
about staying in shape buy the best running shoes, carefully pick
out the best bikes and tread on durable treadmills.
But do you pay just as much attention to your nutrition? Scientists
who have studied exercise have found that what you eat before, during
and after workouts is crucial to maintaining your health, getting
into shape and staying fit. To achieve your best athletic performance
without getting injured or sick depends on optimum nutrition. When
you carefully plan what to feed your exercised body, it rewards
you by feeling and looking better.
Short 'n Sweet
If you thought long exercise sessions were the only ways to get
decent exercise benefits, take notice: small doses of exercise during
the week can go a long way.
"The important thing, apparently, is just do it," says
Howard D. Sesso, ScD, author of an American Heart Association study
on exercise and heart disease. In his study, exercisers demonstrated
that several short sessions of exercise were as good for the body
as a single long session (Circ 8/00; 102:975-80).
"Short sessions lasting 15 minutes long appear to be helpful,"Dr.
Sesso explains. Even walking about three miles per week, which is
a moderate level of exercise, lowers your risk of heart disease
by 10%.
No Sweat?
Some people glorify in working up a sweat; others curse the dampness.
But putting in extra effort in even short bursts of activity pays
off: experts have found that intense exercise burns more calories
than more relaxed sessions, more effectively reduces your risk of
cardiovascular disease and helps stabilize blood sugar levels. In
addition, it stimulates production of human growth hormone, which
offsets some of the effects of aging (Exp Biol Med 2004 Mar; 229(3):240-6).
But don't go crazy if you haven't worked out in a long time. The
intensity of the workout should match your physical fitness.
According to the American Heart Association, when people exercise
at a comfortable pace, their heart rate and level of exertion stay
within a safe range, but still high enough to benefit their health.
Strenuous activities, for those who can handle them, produce the
most physiological bang for the jog. But brisk walking within your
own level of fitness still offers significant benefits.
Feeding Your Muscles
When you exercise, you work and develop your muscles, which are
made primarily out of protein.
Despite this fact, many exercise experts have advocated high-carb
diets for athletes. But, as John Ivy, PhD, and Robert Portman, PhD,
point out in their book The Performance Zone (Basic Health), "[While]
there is no doubt that aerobic athletes require more carbohydrate
than strength athletes
we are now discovering that the addition
of protein to a carbohydrate supplement offers significant benefits
to aerobic athletes."
That is why researchers believe that consuming plenty of protein
along with carbohydrates offers the best fitness benefits. Protein
helps fuel activity more efficiently and aids in recovery after
a session at the gym, allowing your body to repair muscle damage
and build up muscle fibers.
During exercise, you break down muscle tissue. It is during recovery,
after your exercise session ends, that muscles are rebuilt. At the
same time, other cellular processes take place that adapt the body
to working out.
According to Ivy and Portman, timing your intake of nutrients after
exercise is crucial: "The ability of the muscle machinery to
regenerate itself decreases very rapidly after a workout, so that
the nutrients consumed more than 45 minutes after exercise will
have far less impact in helping the muscles regenerate than nutrients
consumed earlier."
Stresses and Tears
Engaging in athletics can cause microscopic muscle tears. These
tears can cause a range of problems that, when you exercise excessively,
can cause pain and injury.
Inflammation is the body's response to cellular damage. The damaged
area can swell as the body sends white blood cells and other cells
to repair the injured area. Unfortunately, the swelling can further
damage the muscle cells.
Since inflammation can take 24 hours or more to cause the collection
of cells in the injured area, it can be a day or two before the
resulting muscle soreness reaches its peak painfulness and then
starts to subside.
Cortisol, a hormone produced when you exercise strenuously, which
can result in muscle fiber damage. Cortisol boosts protein breakdown,
so it can be used to fuel muscle movement. But the more protein
breaks down, the more potential exists for muscle fiber injury.
Free radicals are caustic molecules that are created when the mitochondria
(small structures in cells) create energy; these marauders can also
cause microscopic shredding of muscle strands. As you increase your
use of energy during exercise, you simultaneously increase the production
of free radicals. This collection of free radicals can outstrip
the body's antioxidant defenses, leading to extensive muscle damage
and dampening of the immune system.
All of these cellular events can make you sore. They are also the
reasons that athletes who overdo it day after day are liable to
come down with nagging colds and a variety of infections.
Muscle Fuel
Your muscles use different substances for fuel depending on what
you ask them to do. Lift a heavy weight and muscles recruit two
processes called the creatine phosphate system and glycolysis to
generate a large amount of quick energy. These are known as anaerobic
types of energy production.
But if you jog, swim, bike or perform any other aerobic activity,
the cells use oxygen in what is called cellular respiration to supply
energy to working muscles.
When you exercise aerobically for extended periods of time, the
energy available is generally limited by how much oxygen your body
is capable of taking in and supplying to the muscles, where it takes
part in energy production. In athletic circles, this upper limit
is known as your VO2max.
The carbohydrates your body burns for energy during aerobic activity
are taken from blood sugar and carbohydrate reserves called glycogen.
(The muscles store glycogen, as does the liver.) During a workout
session, your glycogen supply is limited to what is stored with
your muscles. But blood glucose can be boosted by carbohydrate drinks,
energy gels or bars.
Most people who work out have enough glycogen and blood sugar to
fuel moderate aerobic activity for about two hours. After that,
the body turns mostly to fat and protein stores to fuel exercise.
Fat Into the Fire
In contrast to the body's quickly diminishing supply of glycogen
and blood sugar, fat can last for hours and hours of exercise. According
to Portman and Ivy, a 200-pound man with 15% body fat has, theoretically,
enough fat energy to run from Washington DC down to Miami Beach-and
still has enough energy left over to jump into the ocean.
But using fat for energy is complicated; fat is stored in fat tissue
and not readily available to working muscles. Plus, to burn fat
for energy, the body needs carbohydrate-it cannot burn fat all by
itself. What's more, the conversion of fat into energy doesn't go
as quickly as carb conversion.
Protein is also used for energy when carbs run low. But the more
you use protein for energy, the more you risk soreness as muscle
fibers break down.
Prepare to Energize
To maximize your energy during exercise and minimize soreness, Portman
and Ivy recommend some simple nutritional steps:
* Drink 14 to 20 ounces of water or a sports drink with electrolytes
about a half hour before you work out. Consuming fluid helps stave
off dehydration longer, helps you sweat more (which cools your body)
and moderates the rise in body temperature that takes place during
exercise. Portman and Ivy favor sports drinks to help you retain
fluid and maintain your mineral balance.
* Eat carbohydrates an hour before exercising, which boosts glycogen
and increases blood sugar and insulin. Portman and Ivy add that,
alternatively, you can also consume a protein/carbohydrate sports
drink about half an hour before working out. The protein helps protect
muscle protein from being broken down.
* Drink small amounts of fluid frequently as you exercise to replace
water lost through sweating. While some experts recommend only drinking
enough to quench your thirst, most researchers agree that a sports
drink with electrolytes is best to ensure proper mineral balance
in your body.
* Consume carbs and protein during exercise. Portman and Ivy note
that soccer players who consume sports drinks that contain electrolytes,
carbohydrates and a bit of protein can perform more effectively.
Cyclists who go on bike rides of three hours or more enjoy more
endurance when they eat energy bars or consume other sources of
carb and protein. Portman and Ivy advocate drinks that contain carbs
and protein in a 4:1 ratio.
Limit Soreness
Taking protein and carbs while working out can limit muscle damage
and curtail soreness. Carbs apparently drop your cortisol levels,
and thereby limit muscle injuries linked to this hormone.
While the mechanism that helps protein limit muscle soreness is
not completely understood, it is possible that taking in protein
while working out keeps the body from shredding muscle tissue in
search of fuel.
Supplements that contain antioxidants such as natural vitamin E
and vitamin C (Portman and Ivy think you should take these during
exercise) may limit free radical damage to muscle fibers.
Muscle Reconstruction Plan
If you want to help your exercise plan make you stronger, you should
focus your after-exercise sports nutrition plan on these steps:
* Help your muscles recover from damage during activity and stimulate
the rebuilding process
* Replace glycogen (carbohydrates) the muscles have used up during
your workout
* Reinforce your immune system
* Replace water and minerals lost in sweat
Even after you stop exercising, your muscles are still breaking
down, according to Ivy and Portman. The key to putting the brakes
on this breakdown and initiating the rebuilding process is by consuming
a combination of protein and carbohydrate within 45 minutes after
your workout is completed.
The protein part of the equation is vital: don't merely indulge
in only carbs after exercising. A recent study found that while
carbs could help muscles rebuild, adding protein can make a big
difference in improving your fitness (J App Phys 2/04).
This combination of nutrients stimulates the pancreas so that it
releases insulin. The release of insulin is the key, initial step
that sets off a cascade of physiological events that speeds muscle
recovery. Although many people think of insulin as an undesirable
hormone-if you never exercise, too much insulin may help drive your
blood sugar down and cause other problems-for exercisers, this hormone
plays a crucial function in benefiting from exercise.
By eating carbohydrate and protein soon after working out and stimulating
insulin, according to Ivy and Portman, you help your body boost
its synthesis of protein by:
* Increasing the amount of amino acids (protein building blocks)
that get into the muscles-this can increase by up to 50%
* Increasing the production of protein synthesizing enzymes by up
to two-thirds
* Slowing the breakdown of muscle proteins
Drinking for Exercise
The most obvious nutrient you lose during intensive exercise is
water in your perspiration. However, that perspiration also contains
an array of minerals known as electrolytes. So, for optimal performance
and health, experts recommend you replace both the water and its
minerals.
Merely drinking water-instead of electrolyte-filled sports drinks-during
prolonged aerobic activity can be dangerous. It leaves you vulnerable
to a condition called hyponatremia, which can occur when your blood
levels of sodium and other electrolytes drop, but your blood volume
stays steady or increases because you drink lots of water.
According to Edmund Burke, PhD, in his book Optimal Muscle Performance
and Recovery (Avery), one out of four athletes who seek medical
attention after a long race are suffering hyponatremia.
"Typically," he says, "conscientious athletes get
in trouble because they adhere too diligently to one recommendation:
the need to drink lots of fluids. They tend to ignore another recommendation:
The need to keep electrolytes up
for most endurance athletes
the real problem is drinking too much water." Dr. Burke warns
that you can possibly suffer hyponatremia even if you don't drink
a lot of water.
Signs of hyponatremia can be similar to those of heat exhaustion.
But, while resting and cooling down can help alleviate heat exhaustion,
that doesn't help hyponatremia.
"To protect yourself against hyponatremia, start by paying
attention to how much you sweat," Dr. Burke says. If your sweat
seems very salty, burns your eyes or leaves an evident, white residue
on your skin, you may be losing a great deal of sodium and should
be diligent about eating salty foods.
"You can also make sure you're getting enough sodium by drinking
sports drinks instead of plain water during long (exercise) events,"
Dr. Burke notes.
Exercise Matters
Of course, no matter what you decide to eat or drink while exercising,
the most important factor for your well-being is to get out to the
gym, onto the track, or just on to the sidewalk, and do something,
even if you only want to go out for a walk. No matter how old you
are or what kind of shape you're in, you'll benefit from exercise.
"It's solid evidence that across-the-board declines occur when
people stop exercising," says Charles Emery, PhD, professor
of psychology at Ohio State University (Health Psychology 3/04).
Don't decline or remain supine. Let your fitness climb.
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