Vitamin A

Vitamin A are a group of fat-soluble vitamers (the retinoids) required for many physiological functions, mainly vision, reproduction and epithelial maintenance. In the retina, a specific retinoid, 11-cis-retinal, is formed by photoisomerisation within the rods and cones.

Related pathology

Pathological manifestations can occur with both excess and deficiency:

• hypervitaminosis A
• hypovitaminosis A

Siehe auch:

• Vitamin-A-Mangel