it was possible to verify this experimentally established biopotency of 0.37 for the total vitamin e in barley by converting the chemically determined amounts of the vitamin e isomers in barley into dl-alpha-tocopheryl acetate equivalents by multiplying them with internationally accepted potency factors for the individual natural isomers ( dl-alpha-tocopheryl acetate 1.00 , d-alpha-tocopherol 1.49 , d-beta-tocopherol 0.60 , d-gamma-tocopherol 0.15 , d-alpha-tocotrienol 0.37 ) .
C0042874
vitamin e
C0994472
dl-alpha-tocopheryl