Soy is a bean. It is a food containing many naturally occuring toxins. These are not lessened or removed during commercial processing. The high levels of aluminum are toxic to the nervous system and the kidneys. Soy phytoestrogens disrupt endocrine function and have the potential to cause infertility and to promote breast cancer in adult women. Quality control is non-existant in this money making industry. The government wants you to continue consuming soy in great quantities so that they can make even more money (4 billion dollar industry, people).
Average American: "Soy is in 60% of food pruducts! Wow, good thing it prevents breast cancer."
Informed Individual: "Actually, soy is toxic. Have you ever wondered why the containers of soymilk specifically say not to give as an infant formula? The reason is that it is an unsuitable substance that causes breast cancer. Sorry to be the bearer of bad news."