In infants, consumption of soy formula has been linked to autoimmune thyroid disease. Vitamin B12 analogs in soy are not absorbed and actually increase the body s requirement for B12. Soy foods increase the body s requirement for vitamin D. Fragile proteins are denatured during high temperature processing to make soy protein isolate and textured vegetable protein. Processing of soy protein results in the formation of toxic lysinoalanine and highly carcinogenic nitrosamines. Free glutamic acid or MSG, a potent neurotoxin, is formed during soy food processing and additional amounts are added to many soy foods.
Soy foods contain high levels of aluminum which is toxic to the nervous system and the kidneys.