has role vitamin (molecular entity) antioxidant chromanol fat-soluble vitamin (role) vitamin E vitamin E Wikipedia:Vitamin_E PMID:33896432 vitamin E vitamin-E PMID:34278890 MetaCyc:Vitamin-E vitamins E PMID:7898412 PMID:33847203 Any member of a group of fat-soluble chromanols that exhibit biological activity against vitamin E deficiency. The vitamers in this class consists of a chroman-6-ol core which is substituted at position 2 by a methyl group and (also at position 2) either a saturated or a triply-unsaturated hydrocarbon chain consisting of three isoprenoid units. The major function of vitamin E is to act as a natural antioxidant by scavenging free radicals and molecular oxygen. CHEBI:33234 chebi_ontology PMID:34277234 vitamin E vitamer vitamin E vitamers PMID:7901680 PMID:33684201 d-alpha-tocopherol vitamin e chroman-6-ol food supplements, vitamin substances (ec)