DL Tocopherol synthetic vitamin E and D Tocopherol organic vitamin E.  D Tocopherol is 1.78 times more absorbable than DL Tocopherol synthetic vitamin E, however when listing IU(International Units) guarantees on labels for Vitamin E, this is already taken into account when using synthetic and more product is added to make it equal to organic.  Natural Vitamin E is much more expensive than synthetic.