Vitamin A crystals

Vitamin A crystals

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Credit: MICHAEL W. DAVIDSON/SCIENCE PHOTO LIBRARY

Caption: Vitamin A. polarised light micrograph of crystals of vitamin A (retinal). Vitamin A is required by the body for normal growth, for the formation of bones & teeth, for cell structure and for protecting the linings of the respiratory, digestive & urinary tracts against infection. Vit- amin A is absorbed by the body as retinol. This is found in liver, fish liver oils, egg yolk & dairy produce. Carotene is converted into vitamin A in the body, & is found in green vegetables & fruit. Vitamin A deficiency is rare in developed countri- es. The first symptom of deficiency is night blin- dness, with dryness & inflammation of the eyes & stunted growth in children. Magnification: unknown

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Keywords: biochemical, biochemistry, chemical, chemistry, compound, compounds, crystal, crystals, retinol, retinol crystal, vitamin a

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