HERVE CONGE, ISM / SCIENCE PHOTO LIBRARY HERVE CONGE, ISM / SCIENCE PHOTO LIBRARY
Vitamin C crystals, polarised light micrograph. Vitamin C, ascorbic acid, is an essential vitamin that is found in fruit and green vegetables. It is needed for the growth and maintenance of bones, teeth, skin and blood vessels. It is also a powerful antioxidant. Deficiency in vitamin C leads to scurvy, which causes bleeding gums and anaemia. Magnification: x70 when printed at 10 centimetres wide.
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