3. Vitamin C
Vitamin C is a water-soluble antioxidant that performs a variety of important functions in the body’s cells. It is required for the synthesis of collagen, the most abundant structural protein in the body, for example.
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Kale is much higher in vitamin C than most other vegetables, containing about 4.5 times much as spinach. The truth is, kale is actually one of the world’s best sources of vitamin C. A cup of raw kale contains even more vitamin C than a whole orange.
