Donald C. Mahan

During the last 30 years there has been a scientific debate over whether natural or synthetic vitamin E is superior to the other.  The rat fetal resorption test demonstrated that natural was superior by a 1.36 ratio.  Synthetic vitamin E is manufactured having several chemical forms which differ in bioavailability, thus the major reason why synthetic vitamin E was poorer on a mg / mg basis.  However, recent research has shown that the 1.36 ratio underestimates the relative bioequivalence of the natural vitamin E form.  Past and current research was used to calculate the bioequivalence of the 2 vitamin E forms in this presentation.  In general, swine of all productive phases seem to utilize both forms of vitamin E but the natural source of vitamin E is more effective.

A.C. Grace Company Advisory Counsel members Robert Stuart, PhD, and Ed Kane, PhD, provide valuable research and data to Donald C. Mahan, PhD, Professor in the Department of Animal Studies at The Ohio State University to provide this report showing how NATURAL Vitamin E is more effective than SYNTHETIC Vitamin E.

(Read the full report here)