Nutrition
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Interestingly, omnivores almost never worry about getting the right balance of
nutrients in their diets. As soon as they hear that you are vegetarian, though,
they will come up with some quite creative questions, such as, "Are you getting
enough zinc ?" Following are some answers. Generally, vegetarians do not have
to worry about getting enough of the right types of nutrients. Vegans may have
to be a little more vigilant, particularly about Vitamin B12 (available in most
multivitamins.) It probably is a good idea, though, to tell your doctor what
you actually do eat, in case some supplement is required. Following is some
information about the major nutrient sources. |
Protein The question most frequently
asked is actually about protein. Most omnivores have way too much protein in
their diets. Too much protein can cause heart disease, colon cancer, and kidney
stones. To calculate how much protein you need (in grams), multiply your weight
in kg. by .8 For example a 60 kg. person (approx. 132 lb.) needs 60 x .8 = 48
grams of protein per day. Protein exists in most foods, with the notable
exceptions of sugar, fats and oils. Legumes (anything from a pod) are an
excellent source of protein - for example, peas, lentils, peanuts (yes, they
are legumes not nuts !), chickpeas, soybeans and soy products, such as tofu. A
half cup (120 ml) of tofu has approximately 20 grams and just 1 tablespoon (15
ml) of peanut butter has 12 grams - so it's not hard to get your protein !
Legumes are not the only source of protein - it is also found in nuts, grains,
pasta and rice.
Iron Another myth regarding a vegetarian
diet is that it will result in iron deficiency. - not so ! As with protein,
legumes are a good source of iron, but it is also found in dark green
vegetables, dried fruits, nuts, and whole grains. Another way to increase iron
in the diet is to use cast iron cookware.
Calcium Contrary to
popular opinion, milk and other dairy products are not necessary to maintain
calcium levels in your body - vegans already know this, of course. One
important aspect of maintaining calcium is to minimize the loss. High protein
diets (particularly animal protein) causes calcium to be lost through the
urine. Salt and caffeine also increase the loss through urine. Exercise is also
important to minimze calcium loss. It is found in dark green leafy vegetables
(e.g. broccoli), calcium enriched soy milk, tofu, sesame seeds, dried
figs.
Carbohydrates Carbs are good ! Who knew
? Carbohydrates provide a source of dietary fibre. This is important for the
digestive system, helps prevent constipation, and reduces the risk of colon
cancer. Good sources of carbohydrates are whole wheat bread and pasta, bread,
potatoes, berries, dates, figs, and apricots.
Zinc Zinc is found in
legumes, nuts and seeds, whole grains, green vegetables, and for ovo-lacto
vegetarians in eggs and cheese.
Potassium Potassium is found in bananas,
dates, prunes, beets, potatoes, green vegetables, sea vegetables, and
legumes |
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Vitamins
Vitamin A- found in yellow, orange and red vegetables (such as
carrots, squash, tomatoes, red peppers, spinach), also in melons, mangoes,
papayas, and in dairy products |
Vitamin B1- found in whole grains, beans,
yeast |
Vitamin B2- found in mushrooms, almond,
pecans, milk, cheese, yogurt, dried apricots and prunes |
Vitamin B3- found in legumes, grains, green vegetables, milk,
coffee |
Vitamin B6- found in beans, grains, carrots, bananas,
eggs |
Vitamin B12- found in dairy products and
eggs, some soy milks, multi vitamins |
Vitamin C- found in fresh citrus fruits,
tomatoes, potatoes |
Vitamin D- made by the body when it is
exposed to sunlight, also added to some dairy products |
Vitamin E- found in avocados, soy beans (and soy products),
vegetable oils, nuts and eggs |
Vitamin K- found in spinach, leafy
greens, cauliflower |
Cholesterol, Fats and Essential Fatty
Acids
- the good, the bad and the urban myths
Everyone has cholesterol, even people who eat no
animal products at all. Cholesterol, per se, is found only in animal products.
However, our bodies can make it from saturated fat (hydrogenated or partially
hydrogenated plant oil.) We need some cholesterol, but as most know, too much
can clog the blood vessels and cause heart attacks.
Products with saturated fat, such as
margarine, are solid at room temperature. Eating some saturated fat is probably
OK and for most people hard to avoid.
Monounsaturated fats that are liquid
at room temperature - eg. olive oil - are actually good, as they raise the
"good" cholesterol. Canola, peanut oil and avocados also contain
monounsaturated fat.
The jury is still out on polyunsaturated fats, but the
consensus is that they are probably better than saturated fats. Corn, soybean
and sunflower oil are examples of polyunsaturated fats.
Essential Fatty Acids
- Omega-6 and Omega-3
Omega-6 comes from many sources, but many think that
one must eat salmon for omega-3. Not so ! Just a few walnuts or a tablespoon of
flaxseed oil provides a daily amount of omega-3. Also, many products are
fortified with EFA's. (Check labels.)
The bottom line:
- Try to avoid animal products and products with trans
fatty acids
- Use saturated fats in moderation
- Use monounsaturated fats such as olive, peanut, and
canola oil
- Obtain your EFA's (omega-6 and omega-3) from walnuts,
flaxseed oil or fortified products
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Bibliography
The nutritional information has been compiled from the
following sources:
- "Veggie Revolution" (by Sally Kneidel, Ph.D. and Sara
Kate Kneidel, 2005, Fulcrum Publishing, Golden, Colorado
- "Becoming Vegetarian" (by Vesanto Melina, R.D., Brenda
Davis, R.D., Victoria Harrison, R.D., 1994, Macmillan Canada,
Toronto)
- "Linda's Kitchen" (by Linda McCartney, 1995, Little,
Brown and Company Inc.)
- "Great Vegetarian Food" (Australian Women's Weekly,
2001, ACP Publishing Pty Limited )
- Web Site of Physicians Committee for Responsible
Medicine
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