NAC

N-acetylcysteine 🟡 Moderate

A glutathione precursor also used as a mucolytic.

⚠ Clinical use differsSee cautions below; consult your physician for specifics.

Reviewed by Dr. Sungwoong Jung · Last reviewed Jul 16, 2026

Key benefits

Glutathione precursor

Mucolytic (airways)

Antioxidant support

How it works

Evidence

🟢 StrongAntidote for acetaminophen overdose (clinical)

🟡 Moderate / mixedGeneral supplement effects vary

The same nutrient can differ for "correcting deficiency" vs "general prevention."

Suggested use

Distinguish supplement vs clinical use.

A general suggestion, not a prescription.

Cautions & interactions

Regulatory history in US; OTC respiratory drug in Korea.

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Korea vs USA

🇰🇷 Korea

OTC drug exists

🇺🇸 USA

popular supplement

References

NIH — NAC (overview) ↗

Grades/refs re-verified at each update (draft).

Milk Thistle Milk Thistle A herb traditionally used for liver health with mixed clinical evidence. 🟠 Limited Liver

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CONTAINS AFFILIATE LINKS · independent of our rankings

🇰🇷 Buy in Korea 🇺🇸 Buy in USA

Disclaimer — This content is for general information and suggestion only and does not replace medical diagnosis or treatment. Consult a doctor or pharmacist if you have a condition or take medication.

NAC