Vitamin A: A Review Article

Abstract

Vitamin A has important function in the body. Vitamin A is involved in growth, an reproduction. In this paper description, function and deficiency diseases of vitamin A has been delineated here with. Vitamin A is an essential micronutrient for the normal functioning of the visual system, growth and development, immunity and reproduction. Vitamin A is a constituent of visual pigment and maintains epithelium. It protects against some epithelial cancer Vitamin A being a potent antioxidant is required for cell regulation. To combat the deficiency of vitamin A in community, awareness of their importance and their source plays a vital role. Food-based approaches have been reviewed and judged to have a promising role in integrated strategies, but many gaps in knowledge were identified; more well-designed studies on efficacy, effectiveness, cost effectiveness, and sustainability of food-based approaches are needed. The main sources of preformed vitamin A or retinol are liver, whole milk, fish oil and egg. Vitamin A is present in many animal tissues and is readily absorbed from such dietary sources in the terminal small intestine.