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Last Updated: September 20, 2026 · Medically reviewed · Cross-checked with 6 AI models
NAC: cysteine for glutathione and lungs
NAC — cysteine for glutathione and lungs. N-acetyl cysteine provides the building block for glutathione, the body's master antioxidant. It also thins mucus in the airways, making it a staple in respiratory support research. Common supplemental doses range from 600 to 1,200 milligrams per day. Handle this early and you often avoid needing a stronger intervention later. Cells become more responsive to insulin, thyroid and stress hormones. Pick the version that fits your actual schedule, not your ideal one. For most adults, use NAC under guidance if you have respiratory or metabolic health goals. Stay curious about your own response and iterate from there.
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