The Body Molecules Course Online

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Body Molecules course online Vitamin A The recommended daily allowance of vitamin A is 900 micrograms (µg) for women and 700 µg for men. The richest food sources of vitamin A include dairy products, fish, liver, and fortified cereals; the top sources of provitamin A include broccoli, carrots, squash, and cantaloupe [36]. Vitamin A and β-carotene are structurally interrelated, and the liver converts β-carotene to vitamin A. One molecule of β-carotene yields two molecules of vitamin A. When we look at the two molecules side by side, we can see that vitamin A is remarkably similar to half of the β-carotene molecule. β-Carotene is a plant pigment that is responsible for the vibrant colors of red, orange, and yellow vegetables. B-Carotene has been classified as a provitamin A carotenoid, which means that it can be converted by the body