*Diet*Power Help

**International
Units of Vitamin E**

The vitamin-E content of a food or recipe is sometimes measured in milligrams of alpha-tocopherol (often written as "a-tocopherol"), and sometimes in International Units (IUs). There is a mathematical relationship between the two measures: one IU is 0.67 milligram of alpha-tocopherol. Hence:

multiply the number of IUs by 0.67.**To convert IUs of vitamin E into milligrams of alpha-tocopherol:**

multiply the number of milligrams by 1.5.**To convert milligrams of alpha-tocopherol to IUs:**

(These conversion factors are for *natural* vitamin E, which is technically
called d-alpha-tocopherol. For the *synthetic* form of the vitamin, called dl-alpha-tocopherol, the
conversion factors are 0.45 and 2.2, respectively.)