It contains selenium and zinc – nutrients that can cut the time you struggle with a cold or the flu by nearly half! Your best bet: Get two 6-ounce servings a week of shrimp, crab, oysters, or mussels.  And there’s a natural way to grow stronger hair and make it grow faster. Try eating foods rich in omega-3 fatty acids. Yup, the same stuff that’s good for your heart is good for your hair. And get some more iron too, with dark-green vegetables like spinach and broccoli. Iron increases blood circulation to the scalp and help keep hair healthy from the root.