He hua'ōlelo hui ka Vitamin E no 8 mau pūhui pili i haku ʻia me ka tocopherol a me ka tocotrienol. He papa ia o nā huaora -soluble me ka hana antioxidant. Ma waena o kēia mau pūhui, no ka mea, ʻoi aku ka maikaʻi o ke kino o ke kanaka i ka hoʻomoʻa ʻana a me ka metabolizes -tocopherol, -tocopherol ka bioavailability nui loa a ua aʻo nui ʻia.
Ua ʻōlelo ʻia ʻo Alpha-tocopherol ka momona koʻikoʻi-soluble antioxidant. Hoʻopau ia i nā intermediates radical manuahi a hoʻōki i ka ulu ʻana o ke kaulahao o nā radical manuahi, a laila e pale ai i ka membrane cell mai ka luku ʻana i nā lipid peroxide i hana ʻia e ka hopena kaulahao peroxidation. Hiki ke ho'emi 'ia nā antioxidants 'ē a'e e like me ka vitamina C, retinol a i 'ole panthenol no ka ho'i 'ana i ka 'oihana ho'emi a ho'omau i ka hana antioxidant. Ua ʻike ʻia nā haʻawina e pili ana i ka -tocopherol ma mua o ka wai-soluble antioxidants hiki ke pale pono i nā cell i nele i ka glutathione peroxidase 4 (GPX4) mai ka make, a ʻo GPX4 wale nō ka ikehu He enzyme e hoʻemi pono i ka lipid peroxides i loko o nā biofilms. Ua ʻike ʻia kēia haʻawina ua kūlike ia me ka hopena antioxidant o -tocopherol ma nā membrane cell.
Eia nō naʻe, ʻaʻole maopopo e pili ana i ke kuleana a me ke koʻikoʻi o kekahi mau huaʻai E i nā hopena antioxidant. ʻOiai hiki i ka -tocopherol ke hana me nā mea mutagenic electrophilic ma ke ʻano he nucleophile, a he kuleana koʻikoʻi ko tocotrienol i ka pale ʻana i nā neurons mai ka pōʻino, pono ia no kekahi mau huaora E ʻē aʻe koe -tocopherol. ʻAʻole maopopo ka hana o nā antioxidants.
