This book provides a comprehensive description and analysis of Soybean as an essential diet requirement and its therapeutic qualities. Legumes are an essential part of a healthy diet. They are an excellent source of carbohydrates, protein, vitamins and minerals. Soybean has its significance in the overall agriculture and trade as well as in its contribution to food supply. Soybean is the richest in terms of protein and has no cholesterol in comparison with animal food sources and conventional legume. In addition to this, soybean is a cheap source of food and has medicinal qualities because of its photochemical, genistein, isoflavones content. It has been found that Soybean is very helpful in fighting diabetes, heart disease and cancer. Presently, Soybean protein and calories are being employed for the prevention of body wasting which is mostly because of HIV. Soybean's nutritional value is of extreme importance in places where medication facilities are not available. Therefore, this book covers some important topics such as techniques in Soybean biodiesel, Soybean & prostate cancer, chemical feedstocks, etc.