N-Acetyl L-Cysteine (NAC) is a powerful anti-oxidant. It can boost mood, reduce compulsive behavior, improve memory, and lower anxiety.Nutrija is probably the only brand in our market that offers such high quality NAC at an affordable rate. I've been taking it for around 6 months now. Needless to say, it had helped my liver as my liver enzymes have gone back to normal. Also, my skin texture and brain function has improved.