pCysteine is a food supplement with a double effect to maintain the health of hair and nails as a result of the unique formula that works to preserve hair and nails from oxidative factors that harm the health of hair and helps its appearance in a healthy and beautiful way 2 tablets twice a day for 3 months Keep out of reach of children And it should not be used with medicines containing Nitroglycerin, LCysteine, Arginine, Vitamin B6, Zincp