100% NAC (N-Acetyl Cysteine) with absolutely nothing else added, no fillers, no bulking agents, no flow agents. The benefits of quality N-Acetyl Cysteine: Immune System Support: Supports immune cell production and function. NAC penetrates bacterial membranes, disrupting their integrity and inhibiting protein synthesis. Promotes Liver & Kidney Health: Protects the liver and kidneys from toxins and aids in the detoxification of heavy metals in these organs. Powerful Antioxidant Support: NAC neutralises free radicals and replenishes glutathione. It also protects neurons from oxidative stress. Supports Bronchial and Respiratory Health: Its sulphur content allows NAC to break down disulfide bonds in mucus, making it thinner and easier to expel.