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The Benefits and Dangers of Soy

Soybeans were first introduced to the United States from eastern Asia in 1804, and now up to half of the world's soy is produced in the United States. Foods derived from soy, such as soy milk and tofu, are popular foods and meat alternatives due to high levels of protein. Although soy products can be beneficial, they are sometimes dangerous.

  1. Nutrition

    • Soy has many nutritional benefits. It is a good source of dietary protein and all eight essential amino acids that help build muscle, increase energy levels and regulate hormone levels. Foods rich in protein also keep appetites satiated for longer, which can lead to weight loss (in combination of a balanced, low-fat diet). Soy is also a source of lecithin, which helps to lower cholesterol and builds cells. According to Mayoclinic.com, soy has been linked to reduced risk of cardiovascular disease, reduction of menopausal symptoms and enhancing brain function.

    Cancer Controversy

    • Soy contains phytoestrogens, which is the plant version of the female hormone estrogen. Even though soy is full of beneficial nutrients, phytoestrogen can mimic the estrogen hormone and, depending on the study, either proliferate or decrease cancer cells in the breast. Either way, The American Cancer Society encourages those with breast or endometrial cancer or those at risk of estrogen-responsive cancers to limit their intake of soy. It is advised that people who have cancer or who are at risk of cancer consult their doctors to discuss soy intake.

    Dangers

    • Soy is brimming with nutrients, but high intakes can be hazardous.According to a study undertaken by UK's Loughborough University (as reported by the BBC in 2008), soy intake may increase the risk of dementia. The research points to a doubled risk of dementia over the age of 65 with high intake of soy. Also, some contents in soy keep the body from ingesting nutrients properly. For example, phytic acid in soy interferes with assimilation of calcium, magnesium, copper, iron and zinc. Soy intake also increases the body's need for both vitamins B12 and D. Soy is a source of aluminum, which, wit high intake, can cause damage to vital organs.

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