How many IU vitamin A is present in a food contain 25 mu g r

How many IU vitamin A is present in a food contain 25 mu g retinol, 120 mu g beta-carotene, (1) and 240 mu g beta-cryptoxanthin. (1)

Solution

Vitamin A has been measured in................IU or retinol activity equivalent (RAE) 1 IU retinol = 0.3 micrograms RAE 1 IU betacarotene = 0.05 micrograms RAE 1 IU beta cryptoxanthin = 0.025 micrograms RAE 25 micrograms retinol.............25/0.3= 83 IU 120 micrograms beta carotene.............120/0.05 = 2400 IU 240 micrograms beta cryptoxanthin............240/0.025 = 9600 IU