Beans and other legumes such as peas and lentils are a good source of natural B vitamins while helping meet protein needs during cancer treatment. Diets high in protein encourage healing, cell repair and strengthen the immune system.
Vitamin B-complex supplements typically include thiamine, riboflavin, niacin, pantothenic acid, pyridoxine, biotin, folic acid and cobalamin. They help the body make energy, maintain healthy skin and keep the nervous, immune and digestive systems healthy. In addition, they play an important role in the production of red blood cells.
There are different schools of thought regarding B vitamins' protection against cancers and how much you'd need to consume to get that benefit; some studies have indicated that a diet high in B vitamins can reduce women's risk of breast and colorectal cancers.