But choosing a vitamin E supplement can be a tricky proposition. Research clearly shows that natural E has the edge over synthetic at lower doses, such as the Daily Value of 30 IU contained in most multivitamins. At these levels, natural E is absorbed better, by a margin of two to one. But there's currently major disagreement among experts over whether that advantage holds true at higher doses. Stick with natural when you can, but if you're taking 100 IU a day or more, don't sweat the difference.
Studies show that both forms of vitamin E are effective at that level.