Vitamin A Functional Roles

Vitamin A helps form and maintain healthy teeth, skeletal and soft tissue, mucus membranes, and skin. It is also known as retinol because it produces the pigments in the retina of the eye.

Vitamin A promotes good eyesight, especially in low light. It also has a role in healthy pregnancy and breastfeeding.

Vitamin A is found in two forms:

• Retinol: Retinol is an active form of vitamin A. It is found in animal liver, whole milk, and some fortified foods.
• Carotenoids: Carotenoids are dark-colored dyes (pigments). They are found in plant foods that can turn into active form of vitamin A. There are more than 500 known carotenoids. One such carotenoid is beta-carotene.

Beta-carotene is an antioxidant. Antioxidants protect cells from damage caused by substances called free radicals.

Free radicals are believed to:

• Contribute to certain long-term diseases
• Play a role in aging

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