Soy: It’s a high-quality source of protein, containing all of the essential amino acids; it’s packed with vitamins and minerals; it has fiber (both soluble and insoluble), omega-3 and omega-6 fatty acids, no cholesterol, and very little saturated fat compared with meat. It’s been touted for reducing the risk of coronary heart disease, osteoporosis, and some forms of cancer, and there’s clinical evidence to back up these assertions.