Soybean is easily available and is very versatile. Its protein level is among the highest of all legumes, and the combination of fatty acids, with a high proportion of unsaturated fats, is very good for burning fat. Research also shows that the isoflavonoids in soy enable you to burn fat more effectively while keeping your muscle mass at the same time. The best soy products are soybeans, soy milk, soy protein powders, soy mince, soy sausages, etc. It is important that the amount of soy protein be enough. So, for instance, soy sauce is not an adequate source. Consult a nutritionist to know more.