Antioxidants raws li cov khoom noj ntxiv tuaj yeem pab tua cov zaub mov lwj. Kev raug cua thiab tshav ntuj yog ob yam tseem ceeb ntawm cov khoom noj oxidation, yog li ntawd, cov zaub mov tuaj yeem khaws cia thiab khaws cia rau hauv cov thawv ntim cua hauv qhov tsaus ntuj, lossis qhwv hauv cov quav ciab xws li cucumbers cia. Txawm li cas los xij, oxygen kuj tseem ceeb heev rau kev ua pa ntawm cov nroj tsuag. Cov zaub mov cog yuav tsim cov ntxhiab tsw tsw qab thiab cov xim tsis zoo tom qab muab khaws cia rau hauv qhov chaw anaerobic. Yog li ntawd, cov txiv hmab txiv ntoo tshiab thiab zaub feem ntau khaws cia nrog 8 feem pua oxygen. Ib puag ncig. Antioxidants yog ib chav kawm tseem ceeb heev ntawm kev khaws cia. Tsis zoo li cov zaub mov lwj uas tshwm sim los ntawm cov kab mob thiab cov fungi, cov khoom noj khov los yog cov tub yees tseem tuaj yeem oxidized sai heev. Cov tshuaj tiv thaiv oxidant muaj xws li ntuj vitamin C thiab vitamins thiab hluavtaws propyl gallate, TBHQ, BHT thiab butylated hydroxyanisole.
Unsaturated fatty acids yog cov feem ntau cov molecules uas yooj yim oxidized; oxidation tuaj yeem ua rau lawv rancidity. Txij li thaum oxidized lipids discolor thiab tsim cov hlau los yog sulfur zoo li saj, nws yog ib qho tseem ceeb heev los tiv thaiv oxidation ntawm cov khoom noj rog. Yog li ntawd, cov khoom noj muaj roj no tsis tshua khaws cia los ntawm huab cua kom qhuav, tab sis tsuas yog khaws cia los ntawm kev haus luam yeeb, salting lossis fermentation. Txawm tias qee cov khoom noj uas muaj roj tsawg, xws li txiv hmab txiv ntoo, tau txau nrog sulfur-muaj antioxidants ua ntej cua ziab. Cov tshuaj tiv thaiv oxidation feem ntau xav tau cov hlau catalysis, uas yog vim li cas cov rog zoo li butter tsis tau qhwv hauv cov ntawv txhuas los yog khaws cia hauv cov thawv hlau. Qee cov khoom noj muaj roj xws li txiv roj roj tuaj yeem zam tsis tau oxidation vim tias cov zaub mov nws tus kheej muaj cov tshuaj antioxidants ntuj, tab sis nws tseem muaj txiaj ntsig zoo rau photooxidation. Qee cov lipid tshuaj pleev ib ce xws li lipsticks thiab moisturizers kuj yuav tsum tau ntxiv nrog cov tshuaj tua kab mob antioxidant kom tsis txhob rancidity.
