Ko te Huaora E he huaora hongi me te kore reka he huaora ngako wairewa me te antioxidant, anticancer, anti-inflammatory me etahi atu mahi. E ai ki tona hanganga ngota, ka taea te wehewehe ki nga waahanga e rua: tocopherols me tocotrienols. Ka wehewehea ia waahanga ki nga momo e wha i runga i te tuunga methyl i runga i te mowhiti chromophore: alpha, beta, gamma, me te delta [1-2]. Ko nga kohinga e pa ana ki te tocopherols, penei i te tocotrienols, he mahi i te wa e rereke ana nga whakakapi, engari ka tino heke te mahi o te tocopherols.

Ko te tocopherol me te tocotrienol he kaha nga paanga antioxidant. Na te mahi o te pūmua whakawhiti alpha tocopherol (alpha TP) me te tocopherol binding protein (TBP) i roto i te tinana, ka ngawari ake te tocopherol ki te whakauru me te whakamahi e te tinana. Na reira, ka kiia ko te alpha tocopherol te whakaaturanga matua o te mahi antioxidant huaora E i roto i te tinana. Ko te Alpha tocopherol, me te tauira irapoi o C29H50O2 me te taumaha ngota o te 430.5, ka wehewehea ki nga momo e rua i runga i tona puna: te taiao me te waihanga, e kiia ana ko D-momo me te L-momo, ia. Ko te alpha tocopherol taiao kei roto i te R conformation (RRR), i te mea ko te alpha tocopherol kua whakahiatotia i roto i te hanganga RS (RRR, RSR, RRS, RSS, SRR, SSR, SRS, SSS). E pa ana te ahua ki tana mahi, a kua kitea e nga rangahau ko te alpha tocopherol anake me te 2R neke atu ranei ka taea te whakamahi me te whakauru ki te tinana. Na reira, he nui ake te uara kai a te alpha tocopherol maori, he haumaru ake i te alpha tocopherol kua waihangahia.