Cysteine ??ni kimwe mu bigize glutathione, ishobora kwihutisha gusaza kwa radicals yubuntu. Cysteine ??irashobora guhinduka kuva methionine mumubiri, kandi iki gikorwa gisaba uruhare rwa vitamine B6. Hagati aho, iyo ufashwe hamwe na seleniyumu na vitamine E, sisitemu irashobora gukora neza cyane. Byongeye kandi, sisitemu irimo sulfure nyinshi, ifasha kurandura ibintu byuburozi kurinda selile.