Vitamin B

Vitamin B

Pay attention to the Bs. There's barely an aspect of the immune system that these important vitamin do not benefit, research shows. In addition to helping to energize the immune system in general by aiding in the metabolism of carbohydrates and protein, the B vitamin help stimulate the thymus gland (the site of T-cell production) while playing a role in the production of numerous hormones that are essential to immune function.

The best food sources for B vitamins include brewer's yeast, meats, whole grains, milk, eggs, legumes, nuts, and brown rice.