MICHAEL W. DAVIDSON / SCIENCE PHOTO LIBRARY MICHAEL W. DAVIDSON / SCIENCE PHOTO LIBRARY
Polarised light micrograph of crystals of ascorbic acid, the common vitamin C. Vitamin C is a water soluble vitamin and plays an essential role in the activity of many enzymes within the human body. It is important 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. The recommended daily intake for an adult is 30mg. Severe deficiency of vitamin C causes scurvy. Magnification: x10 at 35mm size, x20 at 6x7cm size.
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