Oxidative stress: NAC, or N-acetyl cysteine, helps your body make glutathione, considered the most important antioxidant in the body, and we give you 600 mg per capsule so you can choose your ideal dose (studies typically use doses of 600, 1200, or 1800 mg per day). Nourish brain: Helps regulate the brain’s most important neurotransmitter, glutamate, which helps with learning, behavior, memory, and healthy brain aging. Research is even being done on its effect on sleep! Liver and kidney support: NAC plays a crucial role in supporting the body’s detoxification processes and supports the health and function of the liver and kidneys.  Lungs, heart, immune system: May help you breathe easier by loosening mucus in lungs (expectorant), and supports healthy heart and immune system function. US-made, 3rd party tested, and free of all additives: like all Why Not Natural capsules, this is bottled and 3rd party tested in the US. It's free of added ingredients - no fillers, excipients, bi