Protein-rich, inexpensive soy beans are one of the world’s most cultivated plants. You may be more familiar with soy bean products than with the dry beans, but you can cook them with only a little extra effort or use them to make your own healthy soy milk if you are avoiding dairy. Proponents claim health benefits, saying soy defends against cancer, protects heart health, improves metabolism and digestion, as well as a host of other things.