Viridian High Potency NAC 60 CapsulesHigh Potency NAC is a precursor to the amino acid L cysteine and also supports in building glutathione levels. 100% active ingredients formulated by expert nutritionists. Cysteine is one of 20 amino acids that are the building blocks of proteins used throughout the body. Cysteine is a non essential amino acid as it is one of 12 amino acids that can be produced naturally by the body. Provided in the form of N Acetyl L Cysteine, it provides stability