Vitamin A Recommended Daily, Recommended dietary allowances

Vitamin A is the name for a group of compounds which have the biological activity of retinol. Vitamin A is measured in retinol equivalents (RE) which
allows the different forms of vitamin A to be compared. One retinol equivalent equals 1 mcg of retinol or 6 mcg of beta carotene. Vitamin A is also measured
in international units (IU) with 1 mcg RE equivalent to 3.33 IU.

The RDA for vitamin A is based on the amount needed to prevent the eye disease xerophthalmia with an added margin of safety.

Supplements

Cod liver oil is a rich source of vitamin A and is sometimes used to make supplements. Vitamin A palmitate and vitamin A acetate are synthetic forms of vitamin A found in supplements and fortified foods. Vitamin A palmitate can be absorbed in the absence of dietary fat.

Low dose supplementary vitamin A may be beneficial in the elderly and in those who cannot absorb fats. Vitamin A needs may be increased in cases of
trauma, anxiety, stress, alcohol use and smoking.

Vitamin A Categories:

Vitamin A
Vitamin A Health
Vitamin A Absorption
Vitamin A Deficiency
Vitamin A Sources
Vitamin A Recommended Daily
Vitamin A Overdose
Vitamin A Interactions
Vitamin A Dangerous

Other Vitamins:

Vitamin A
Carotenes
Beta carotene
Lycopene
Lutein
Thiamin
Riboflavin
Niacin
Vitamin B6
Folate
Vitamin B12
Biotin
Pantothenic acid
Vitamin C
Vitamin D
Vitamin E
Vitamin K