E

cholecalciferol. Or it could be calciferol.

Alpha-Tocopherol

Alpha-tocopherol is a version of vitamin E that contains no double bonds. When alpha-tocopherol is delivered to the liver via chylomicron reminants it binds to a binding protein to become rrr-alpha-tocopherol. RRR-alpha-tocopherol is incorporated into VLDL (very low density lipoproteins) membranes and is delivered to perpherial tissues and to LDL. RRR-alpha-tocopherol acts as an antioxidant to prevent polyunsaturated fatty acids from oxidation within VLDL and LDL. Without rrr-alpha-tocopherol oxidation of this fatty acids can occur and cause atherosclerosis.

1 IU is the biological equivalent of about 0.667 mg d-alpha-tocopherol (2/3 mg exactly), or of 1 mg of dl-alpha-tocopherol acetate