DAVID SCHARF / SCIENCE PHOTO LIBRARY DAVID SCHARF / SCIENCE PHOTO LIBRARY
Vitamin C. Coloured scanning electron micrograph (SEM) of crystals of vitamin C, or ascorbic acid. This essential vitamin is found in fruits and green vegetables. It is needed for the growth and maintenance of bones, teeth and blood vessels. Vitamin C deficiency leads to scurvy, which causes bleeding gums and anaemia. Magnification: x47 at 5x7cm size.
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