Vitamin A regulates T cells, immune system soldiers.
This fatty fish is rich in vitamin D, which helps athletes avoid winter upper respiratory infections.
These fungi can boost your immune system to fight sickness. Serve mushrooms with your favorite meal, in a salad, or in soup or sauce.
It is well known that persistent stress impairs the immune system.
Zinc regulates the immune system's response to outside influences, which is helpful when viruses attack but can be harmful.
In time for fall harvest! Squash and pumpkin seeds are zinc-rich, thus they boost immunity.
Yogurt boosts immunity with zinc.