Delta-tocopherol sịntetik (E309) bụ antioxidant nke na-echebe mkpụrụ ndụ site na mmebi site na ime ka okirikiri nke lipids (abụba) belata na nhazi nke free radicals.
E309 (synthetic delta-tocopherol) gụnyere na ndepụta nke mgbakwunye nri nke na-enweghị ikike iji mee ihe na ụlọ ọrụ na-emepụta nri na mba anyị.