DAVID SCHARF / SCIENCE PHOTO LIBRARY DAVID SCHARF / SCIENCE PHOTO LIBRARY
Vitamin C. Coloured Scanning Electron Micrograph (SEM) of the surface of a crystal of ascorbic acid (vitamin C). Vitamin C is a water soluble vitamin which plays an essential role in the activity of many enzymes within the human body. It is necessary for the growth and maintenance of healthy bones, gums, teeth, ligaments, and blood vessels. It is also involved in the production of neurotransmitters and in the stimulation of the immune system against infections. The main dietary sources of vitamin C are citrus fruits and green vegetables. Deficiency of vitamin C leads to scurvy, with swollen bleeding gums and anaemia. Magnification: x130 at 6x7cm size. Magnification: x220 at 4x5 inch size.
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