Soy burgers, soy yogurt, tofu hot dogs, and tofu cheese can be found in a growing number of grocery stores alongside the traditional white blocks of tofu.
Soybeans contain chemicals that are similar to estrogen.
These are probably the active ingredient in soy, although we don't know for sure. They are described in more detail in the article on isoflavones . Most likely, it is the isoflavone part of soy that provides most of its benefits. If you like Japanese, Chinese, Thai, or Vietnamese food, it's easy to get a healthy dose of soy. Tofu is one of the world's most versatile foods.