- Posted September 5, 2013 by
The Health Dangers of Soy
Most soybean products are processed into oil shortening, margarine, cooking oil & salad dressings and meal. For example, you may have noticed (or may start noticing) the popular ingredient “Soy Lecithin” in many of your foods and household items. There was a time when soy was praised a superfood, from combating cancer and high cholesterol.
However, new evidence has emerged with soy’s negative impact on health. Read on to discover the deceptions and dangers of soy and others like beer brioche.
Health Dangers of Soy
1. Impaired immune system
Soy contains endocrine disrupting chemicals called phytoestrogens. They influence the reproductive organs as well as the immune system. In one study they found that mice treated with genistein had less interferon (IFN)-gamma in culture supernatants compared to mice treated with oil. Interferon-gamma is a cytokine that is crucial in innate and adaptive immunity against viral and bacterial infections and tumour control. Decreased levels of this molecule mean decreased immunity and decreased tumour control.
2. Impaired Fertility
Soy isoflavones as seen in point 1, are structurally similar to endogenous estrogens and display both estrogenic and weak anti-estrogenic activities i
impaired fertility and reproductive tract disorders can be a result of said activities. In female rats exposed to high doses of isoflavones their fertility decreased and had altered estrous cycling – it also led to increased uterine weight and epithelial cell height which may contribute to ovarian cysts. Studies done with male rats had no found effects on sexual maturity, preputial separation, fertility, sperm count or testosterone levels.
3. Thyroid Disorders
Soy-containing foods and their isoflavones may adversely affect thyroid function. In one study they investigated whether breast and soy-containing formula feedings in infants were associated with development of autoimmune thyroid disease in the children.
4. Brain Damage
In major study including 3,734 elderly Japanese-American men, those who consumed most soy during their midlife had a 2.4 times higher risk of developing Alzheimer’s disease later in their life. These men consumed tofu at least twice a week and had more cognitive impairment than those who never ate or only sporadically consumed tofu. These researchers also found that high consumption of tofu during midlife was associated with lower brain weight. 574 of the men were assessed for brain atrophy using an MRI machine, and although brain shrinkage naturally occurs with age, those men who ate more tofu had “an exaggeration of the usual patterns we see in aging.
5. Infant Abnormalities
The amount of phytoestrogens that are in a day’s worth of soy infant formula equals 5 birth control pills. Soy-infant formulas contain high levels of isoflavones, and exposing infants to this daily intake equivocates to a 6-11 fold higher isoflavone exposure (based on bodyweight) than the dose that creates hormonal changes in adults consuming soy foods.
Source: WhyDontYouTryThis - September 2013