Soy – a bean or a medicine chest?
Monday, September 17th, 2007Move over Mr. and Mrs. Carnivore, the Vegetarians are moving into the neighborhood and they have their complete proteins too. Soy beans - a chief source of protein for millions across Asia, contain all the essential amino acids in the correct portions to ensure growth and maintenance of our bodies cells. Used in everything from beverages to processed meats, cheeses, pasta, soups and bakery products, soy beans contain 40 – 50% protein, and while they also contain a relatively high level of fat, this is polyunsaturated. (If fat is an issue in your diet, consider the low fat soy products which are available.)
An estimated 7% of the world’s children have an allergy to cows’ milk, making it the most common allergy problem in this section of the population. Soy protein formulas are recommended for infants, and adults, that are allergic to milk proteins or have lactose intolerance. Heat processed soy products, including soy milk, are considered to be hypoallergenic. The high fibre content is another real bonus to your diet.
Nutritionally, fresh is always best, but if you purchase your soy from the shop, look for products that DO NOT have sugar added. Sugar has been a public relation company’s dream product and a whole industry has made billions of dollars getting you addicted to substandard levels of health, but here I digress – lets stick to the subject in hand.
Soy proteins are comparable in digestibility with other protein sources such as meat, fish and milk. It contains isoflavins, those wonderful little things with scientific names that no one can pronounce (like daidzein and genistein) but have been proven to be powerful antioxidants that will minimize damage which may be caused to the body by free radicals, inhibits cancerous growths and blocks the damaging effects of estrogens, whether natural or introduced. Soy also contains saponins, which will boost your body’s immunity, help prevent infections and aid in lowering your LDL cholesterol levels. Also present is phytic acid which is also an anti-oxidant with links to cancer prevention, and lots of omega-3 fatty acids which are important to the immune system and for reducing the risk or heart disease, arthritis and high blood pressure.
You may have heard that soy is not good for you if consumed in the raw state. This relates to the inhibition of certain activity by some enzymes in soy (and also other legumes, cereals, grasses, potatoes, sweetcorn, peanuts and eggs) which is thought to cause problems with the pancreas. Studies show that this is only a problem if you have low stomach acid levels, pancreatic dysfunction, include large quantities of fat in your diet or are a new born child. Proper heating of soy through cooking or processing will destroy the enzymes that cause these problems ensuring that the consumer need not worry about this at all. The ‘home cook’ does need to be aware of this if any of the issues listed above are a consideration for a family member. If in doubt, ALWAYS cook soy beans
For prevention, and supported by numerous studies by scientists around the world, consumption of soy products such as soy beans, soy milk, tofu or tempeh (sorry soy sauce does not count) at least every second day is required, however you will need to consume soy products at least on a daily basis if more aggressive results are required. One negative which you may need to consider is that soy flour may cause flatulence if consumed in high levels.
Able to produce protein on a land yield basis of over 5 times greater than wheat and 25 times greater than beef, soy has solidified its place in our dietary future although the development of genetically modified varieties now does now bring in some questions.