Soya foods contain isoflavones known as genistein and daidzein, a naturally occurring plant form of estrogen that will replicate the function of estrogen in post-menopausal women. Soya foods reduce the risk of prostate cancer by inhibiting cell growth. The mechanism is not yet clear, but research has shown that men who eat a diet high in soya have a much lower incidence of the disease. Soya foods reduce the risk of many digestive disorders because of its high fiber content. This aids in healthy digestion, and has shown to reduce the risk of colon and rectal cancer. Soya milk is dairy-free (there are a few soya cheeses that contain milk proteins, so be careful when purchasing them) and can be used as a substitute for lactose intolerance and milk allergies. Soya milk is great for the dietary treatment of diabetes because soyabeans have a low glycemic index and are cholesterol free (heart disease is a diabetic related condition). Soya foods can be used as a protein source in vegetarian diets because they contain the necessary amount of essential amino acids for tissue repair and growth. Soya is essential for the future of our planet. Soya can be used to feed large numbers of people and animals. Soya is inexpensive to produce, and replenishes the soil rather than depletes it. Soya is an abundant, economical protein source. And soya products offer numerous additional health benefits, from lowering the risk of cancer, osteoporosis and other chronic diseases to easing the symptoms of menopause.