Overview. Theaflavin is a chemical in black tea that is formed from fermentation of green tea. It is used as medicine.MENUVITAMINS&SUPPLEMENTSCENTERFindaVitaminorSupplementFindaVitaminbyConditionAssessYourVitaminNeedsDRUGSANDMEDICATIONSCENTERFindaDrugMyMedicinePillIdentifierInteractionCheckerLatestDrugNewsFindaVitaminFindaPharmacyFIRSTAIDRESOURCESFirstAidA-ZFirstAidKit&WoundCareFirstAidMobileRELATEDTOVITAMINS&SUPPLEMENTSDrugs&MedicationsPillIdentifierMyMedicineInteractionCheckerDiet&WeightManagementFood&RecipesVitamins&SupplementstheaflavinTHEAFLAVINOTHERNAME(S):Teaflavina,Théaflavin,Théaflavine,Theaflavin-3-gallate,Theaflavin-3'-gallate,Theaflavin-3-3'-digallate,Theaflavins.ShowLessOverviewUsesSideEffectsPrecautionsInteractionsDosingReviews(0)OverviewTheaflavinisachemicalinblackteathatisformedfromfermentationofgreentea.Itisusedasmedicine.Peopletaketheaflavinforhighlevelsofcholesterolorotherfats(lipids)intheblood(hyperlipidemia),heartdisease,obesity,andcancer,butthereisnogoodscientificevidencetosupporttheseuses.Howdoesitwork?Theaflavinhasantioxidant,antiviral,andanti-cancereffectsintesttubeexperimentsandinanimals.Theaflavinmightalsonormalizebloodsugarlevels.Theeffectsoftheaflavininhumansarenotwellstudied.Uses&Effectiveness?InsufficientEvidenceforHighlevelsofcholesterolorotherfats(lipids)intheblood(hyperlipidemia).Earlyresearchshowsthattakingagreenteaextractwithextratheaflavinseemstohelpreducecholesterol.Heartdisease.Cancer.Otherconditions.Moreevidenceisneededtoratetheeffectivenessoftheaflavinfortheseuses.SideEffectsWhentakenbymouth:TheaflavinisLIKELYSAFEintheamountsfoundinbrewedblacktea.TheaflavinisPOSSIBLYSAFEintheamountsfoundinmedicinewhenusedforupto12weeks.SpecialPrecautionsandWarningsPregnancyandbreast-feeding:Thereisn'tenoughreliableinformationavailabletoknowiftheaflavinissafetousewhenpregnantorbreast-feeding.Stayonthesafesideandavoiduse.Interactions?WecurrentlyhavenoinformationforTHEAFLAVINoverview.DosingTheappropriatedoseoftheaflavindependsonseveralfactorssuc