Benefits and Harmful Effects of Soy
Soy, used commonly in Asian meals, has become quite popular in the American diet as an alternative to milk and as a substitute protein. It now appears in everything from baby formulas to imitation meat. However, it is important to look at both the benefits and the liabilities of soy before introducing it into your diet.
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History of Soy in the United States
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Soy was introduced to the United States during the Great Depression as a way of regenerating the soil by properly balancing the lost nitrogen. Farmers eventually began to use soy and corn as the primary food sources of cattle. Today, the United States is the leading grower of soy.
Benefits
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Omega-3 fatty acids are present in soy. They are normally found in protein sources such as fish; however, soy also is a protein alternative for vegetarians or people concerned with the high level of mercury in fish. Omega-3 fatty acids can help reduce the risks of getting heart disease and cancer.
Soybeans contain phytochemicals that naturally exist in plants. One of these natural chemicals--isoflavones--has been linked to cancer prevention and reducing heart disease. Isoflavones also relieve symptoms of menopause by boosting estrogen levels.
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Harmful Effects
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Recently, however, soy also has received some negative press. Legumes contain phytic acid, an anti-nutrient that blocks certain essential minerals like calcium, iron, magnesium and zinc. Soybeans have much higher levels of phytic acid than other beans. This is a major concern in soy-based baby formulas, which can cause imbalances and improper development of a baby's nervous system.
The 2009 documentary "Food Inc." revealed what can happen to livestock that are fed soybeans instead of grass. The film claimed that a genetically-modified diet creates genetically-modified livestock, which can negatively impact the health of consumers. Bottom line: Grass-fed beef may be better for you than soy-fed livestock.
Considerations
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According to a 2004 article written by Kaayla T. Daniel, Ph. D. for L.E.A.N. Wellness Center, the way soy is processed also can be harmful. An Asian diet consists of soy after basic fermentation. However, the soy made in America is a genetically-modified crop. An article in the May 2000 issue of "Biotechnology Advances" raises concerns about genetically-modified foods and their nutritional quality, toxicity and resistance to antibiotics. Many textured soy products that resemble meat or dairy products may be harmful, due to their intense chemical modifications.
Conclusion
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The jury is still out on soy. In the meantime, sttay away from food additives and chemicals as much as possible.
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