When you think of Vitamin C, what comes to mind? Maybe it’s the bright, citrusy colors of fruits like oranges, lemons, grapefruits, strawberries or kiwis, or the orange powder packets that float ...

When you feel a cold coming on, you may reach for a vitamin-C packet in hopes you'll save yourself from the sniffles. But experts say there's little to no evidence this nutrient protects against ...