In addition to any possible biological action from isoflavones, many soy products are believed to be healthful. This is because of their high content of polyunsaturated fats (the "good" kind), fiber, vitamins and minerals, and their low content of saturated fat (the "bad" kind). Eating soy foods might lower the risk of heart disease, type 2 diabetes and certain cancers like breast and prostate cancers, as well as improve bone health and give relief from menopausal symptoms. However, if you dig through all the medical literature you will find that it is complicated and we don't have all the answers yet.