Wait...are we telling you to take magic mushrooms? Not quite. Medicinal mushrooms have been a standby of traditional Chinese medicine for hundreds of years, and the supplement may also help boost your immunity to ward of illness—and speed your recovery if you do get sick. Now, we're still a little skeptical, but Dr. Eliaz says athletes swear by them for extra energy and stamina. If you want to give it a try, pick up a blend designed for immunity and overall vitality (preferably organic) at a Chinese medicine specialist.