The unit count will often still remain in use. Vitamin A:
1 IU is the biological equivalent of
0.3 --g retinol, or of 0.6 --g beta-carotene. Vitamin E:
1 IU is the biological equivalent of about 0.667 mg d-alpha-tocopherol (2/3 mg exactly), or of 0.45 mg of dl-alpha-tocopherol acetate.
read more >>