26.0 MB (2.1 MB compressed)
2427 x 3745 pixels
20.6 x 31.8 cm ⏐ 8.1 x 12.5 in (300dpi)
DR M.A. ANSARY / SCIENCE PHOTO LIBRARY DR M.A. ANSARY / SCIENCE PHOTO LIBRARY
Vitamin B3 deficiency. Cracked and inflamed skin on legs, a symptom that the patient's diet is deficient in vitamin B3, a disorder that is known as pellagra. Other pellagra symptoms are an upset digestive system, diarrhoea and depression. Vitamin B3 exists in two forms: niacinamide and niacin. One of the complex of B vitamins, it takes part in many metabolic reactions and, like other vitamins, is needed only in small amounts, but is an essential part of a healthy diet. Good sources of vitamin B3 are liver meat, groundnuts and seeds from the sunflower plant. Photographed in Africa.
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