So we hate to have to do this right now, but…there’s no proof that taking a mega-dose of vitamin C defends against hacking coughs and sniffly noses. Sorry. (It’s really only beneficial if you have a diet consistently stacked in C.)

But don’t write this nutrient off yet—Vitamin C does have a host of other important everyday functions that make it worth your while. To start, it aids the growth and repair of bodily tissue, collagen, bones and teeth. It’s also a potent antioxidant that helps protect against heart disease, cancer, arthritis and diabetes. Plus, foods high in vitamin C help the absorption of iron, so not only will you have a shiny smile if you eat enough of it, but your musculature and energy level will also be in check.

Without sufficient dietary sources of vitamin C, it’s possible to repeat history and succumb to a nasty dose of scurvy, vitamin C deficiency that can lead to bleeding gums, lethargy, jaundice and loss of teeth—yeah, not so attractive. But don’t fret. Your daily recommended amount is only about 90 milligrams, and you’ve got a load of foods to choose from. Here, five killer sources.