source of vitamin c

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Vitamin C

Why you might be low: This one's dietary. According to the latest U.S. Dietary Guidelines for Americans, vitamin C is one the key nutrients that many Americans' diets are lacking, probably because the very best sources are fruits and vegetables.

Why you need it: Vitamin C helps your body absorb iron, and it's also critical for healing wounds and repairing any damaged tissues in your body, including your bones, teeth and cartilage.

Where to find it: In the produce aisle. Top sources of vitamin C include citrus fruits, peppers, cruciferous veggies like broccoli, cauliflower and Brussels sprouts, strawberries and kiwis.