Harvard Health Letter

What you should know about: Vitamin C

Vitamin C is a water-soluble essential nutrient found in highest concentration in fruits (particularly citrus), green vegetables, and tomatoes. It’s necessary for bone structure, iron absorption, skin integrity, and immune function. Evidence shows vitamin C doesn’t help fight the common cold if taken after cold symptoms start. However, if taken for prevention, it may help reduce the length of a cold. The preferred way to get vitamin C is from food sources, not supplements.
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