This calculator calculates the vitamin e alpha-tocopherol using vitamin e iu values.
Vitamin E is a voluntary nutrient whose label unit has changed from IU to mg of alpha-tocopherol. The conversion factor you use depends on whether the source is natural or synthetic.
Formula:
Vitamin E alpha-tocopherol mg (Natural source: food)= Vitamin E IU x 0.67
Vitamin E alpha-tocopherol mg (Synthetic source: supplement)= Vitamin E IU x 0.45
IU stands for International Unit
mcg stands for microgram