Alpha-tocopherol synthetic (Tocopherol, Alpha-tocopherol synthetic, vitamini E, E307) ndi antioxidant yomwe imateteza maselo kuti asawonongedwe mwa kuchepetsa makutidwe ndi okosijeni a lipids (mafuta) ndi mapangidwe a free radicals.
Alpha-tocopherol amadziwika kuti ndi antioxidant wamkulu kwambiri m'thupi la munthu. Kuyeza kwa ntchito ya vitamini E m'mayunitsi apadziko lonse (IU) kudachokera pakuwonjezeka kwa chonde chifukwa chopewa kupititsa padera modzidzimutsa mu makoswe apakati akamamwa alpha-tocopherol. Amachuluka mwachilengedwe pafupifupi 150 % ya zomwe zimachitika mthupi la mayi pa nthawi yapakati mwa amayi.
1 IU ya vitamini E imatanthauzidwa ngati 0.667 milligrams ya RRR-alpha-tocopherol (yomwe poyamba inkatchedwa d-alpha-tocopherol kapena 1 milligram ya all-rac-alpha-tocopheryl acetate (yomwe imadziwika kuti dl-alpha-tocopherol), d yoyambirira, l-synthetic molecular compound, moyenerera yotchedwa 2-ambo-alpha-tocopherol, sinapangidwenso).