Cysteine ????yana ?aya daga cikin abubuwan da ke cikin glutathione, wanda zai iya hanzarta tsufa na radicals kyauta. Cysteine ????za a iya canza shi daga methionine a cikin jiki, kuma wannan tsari yana bu?atar shigar da bitamin B6. A halin yanzu, lokacin da aka ?auka tare da selenium da bitamin E, cysteine ??zai iya yin iyakar tasiri. Bugu da ?ari, cysteine ??ya ?unshi babban adadin sulfur, wanda ke taimakawa wajen kawar da abubuwa masu guba don kare kwayoyin halitta.