Vitamin A

**Definition:** Retinol and derivatives of retinol that play an essential role in metabolic functioning of the retina, the growth of and differentiation of epithelial tissue, the growth of bone, reproduction, and the immune response. Dietary vitamin A is derived from a variety of CAROTENOIDS found in plants. It is enriched in the liver, egg yolks, and the fat component of dairy products.

**Tree numbers:** - D02.455.326.271.665.202.495.818 - D02.455.426.392.368.367.379.249.700.860 - D02.455.849.131.495.818 - D02.455.849.291.925 - D23.767.261.700.860