Can you take too much vitamin C? Yes, it can lead to an upset stomach, irritated skin, and headaches

Doctors recommend you get 65 to 90mg of vitamin C per day. Taking over 2,000 mg of vitamin C supplements can result in ...
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Expert reveals supplements like Emergen-C, don't help prevent a cold

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 ...