NAC (N‑acetylcysteine) boosts glutathione (master antioxidant) and thins respiratory mucus, clearing lungs after colds. Formula: 1000mg NAC + selenium (activates glutathione) + B6/B12 (support immunity/energy). Used proactively before season changes, during smog, or when others are sick—not to prevent colds, but to shorten them, ease coughing, and speed recovery. Real result: a week‑long cold reduced to five days. It helps lungs clear garbage and replenishes antioxidant reserves, making each breath easier.
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