"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Your morning skincare routine probably includes a vitamin C serum. It's a foolproof addition to any ...

Skin experts explain exactly what a vitamin C serum is and why it deserves a spot in your routine. Plus, the best vitamin C ...

Vitamin C: we all know we should be incorporating it into our diets, but it's become increasingly apparent in recent years that the ingredient is important in skincare, too. It can be used by pretty ...

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It may take a sniffly nose, sneezing or a pesky cough to bring vitamin C to mind. Getting sick reminds us of our immune function, which may leave you wondering whether you should take vitamin C daily.