N-Acetyl Cysteine (NAC) – Antioxidant & Cellular Protector

N-Acetyl Cysteine (NAC) is a supplemental form of the amino acid cysteine that plays a vital role in maintaining cellular health by replenishing glutathione, the body’s most powerful antioxidant. By boosting glutathione levels, NAC helps protect cells from oxidative stress, supports detoxification pathways in the liver, and strengthens immune defenses (Mokhtari et al., PMC, 2017). Clinically, NAC is best known as the primary treatment for acetaminophen overdose, where it prevents severe liver injury by restoring depleted glutathione (Millea, Am Fam Physician, 2009). It also acts as a mucolytic, thinning and loosening mucus in the respiratory tract, which has made it a supportive therapy in conditions like chronic bronchitis and COPD (NIH ODS). Beyond these applications, growing research suggests NAC may improve fertility in women with polycystic ovary syndrome (PCOS), reduce inflammation, and even provide neuroprotective benefits that support mental health and cognitive function (TārāMD). With its wide range of benefits — from antioxidant defense and detoxification to respiratory support and cellular resilience — NAC stands out as a versatile nutrient for both wellness and longevity.