Maybe it's not winter yet. But once sickness season sets in (admit it: chances are you're already feeling sniffly), the common cold threatens to zap your energy, break your routine—and keep you out of the gym.

So how can you stay healthy while your friends and coworkers fall prey to nasty germs? While there's no cure for the common cold, our medical expert, Isaac Eliaz, M.D., Director of Amitabha Medical Clinic, says there's no reason to feel helplessly doomed, either. With some smart habits and a little help from nature, you can safeguard your immune system against the season's grossest illnesses.

Read on for his best tips on staying healthy and strong.