This calculator calculates the vitamin a mcg rae Animal source: pre-formed retinol using vitamin a iu values.
Vitamin A is a group of unsaturated nutritional organic compounds that includes retinol, retinal, and several provitamin A carotenoids (most notably beta-carotene). Vitamin A has multiple functions: it is important for growth and development, for the maintenance of the immune system, and for good vision. Vitamin A is needed by the retina of the eye in the form of retinal, which combines with protein opsin to form rhodopsin, the light-absorbing molecule necessary for both low-light (scotopic vision) and color vision.
Formula:
Vitamin A mcg RAE (pre-formed retinol) = Vitamin A IU x 0.3
Vitamin A mcg RAE (beta-carotene from food) = Vitamin A IU x 0.05
Vitamin A mcg RAE (Plant source: beta-carotene from supplements) = Vitamin A IU x 0.3
Vitamin A mcg RAE (Plant source: alpha-carotene or beta-cryptoxanthin from food) = Vitamin A IU x 0.025
IU stands for International Unit
mcg stands for microgram