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evidence · mechanism · dose
Supplements/Amino Acid

NAC (Pre/Post Drinking Use)

aka N-Acetyl Cysteine

Glutathione precursor — bolsters acetaldehyde detoxification before and after alcohol.

Pre-Drinking SupportPost-Drinking RecoveryLiver HealthPost-Drug Use Recovery

Overview

Glutathione precursor — bolsters acetaldehyde detoxification before and after alcohol.

Natural sources
    Common forms

      Mechanism of action

      Cysteine-donor for hepatic glutathione synthesis; GSH conjugates acetaldehyde and reactive metabolites.

      Pathways
      • · GSH synthesis
      • · Acetaldehyde detoxification
      • · Glutamatergic modulation

      Effects on the body

      Supports
      Liver glutathione status
      Decreases
      Acetaldehyde-mediated tissue damage

      Organ system effects

      Liver

      Standard antidote for acetaminophen overdose; supports alcohol detox.

      Evidence-based benefits

      Reduces hangover severity when taken with B6 pre-drinking

      Limited evidence

      Hepatoprotection in heavy drinkers

      Moderate evidence

      Potential side effects

      Common
      • · Sulfur burps
      • · Nausea
      Rare
        Serious

          Drug interactions

          Nitroglycerin
          Potentiates vasodilation.
          moderate

          Safety & non-supplemental interactions

          Educational summary — always confirm with your clinician or pharmacist before starting, stopping, or combining with prescription therapy.

          Other notes
          • ·Discuss with a clinician if you have active liver disease or take hepatotoxic medications.

          Supplement interactions

          Pairs well with

          None listed.

          Avoid combining with

          No specific avoidances listed.

          Dosing & bioavailability

          Typical dose
          600 mg 30 min before alcohol; repeat 600 mg before bed
          Study range
          600–1800 mg
          With food?
          Optional

          Where to buy

          Affiliate-style search links to reputable retailers. We don't endorse specific brands — verify third-party testing (USP, NSF, Informed Sport) before purchase.

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          Wide selection · fast shipping
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          iHerb
          Global delivery · curated brands
          Amino Acid
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          Thorne
          Practitioner-grade · NSF tested

          Scientific evidence (9)

          CohortN Engl J Med · 1988

          NAC for acetaminophen and oxidative protection

          Smilkstein MJ, et al.

          Multicenter analysis of oral NAC in acetaminophen toxicity.

          Key findings

          Highly effective antidote with minimal adverse effects.

          Open study
          Systematic reviewPubMed (NLM) · 1970

          PubMed: NAC (Pre/Post Drinking Use) — Reduces hangover severity when taken with B6 pre-drinking

          Live PubMed search

          Live results for "NAC (Pre/Post Drinking Use) Reduces hangover severity when taken with B6 pre-drinking" across the PubMed/MEDLINE peer-reviewed index.

          Key findings

          Opens current human and preclinical literature matching NAC (Pre/Post Drinking Use) and "Reduces hangover severity when taken with B6 pre-drinking". Filter by RCT, meta-analysis, or year on the results page.

          Open study
          Systematic reviewPubMed (NLM) · 1970

          PubMed: NAC (Pre/Post Drinking Use) — Hepatoprotection in heavy drinkers

          Live PubMed search

          Live results for "NAC (Pre/Post Drinking Use) Hepatoprotection in heavy drinkers" across the PubMed/MEDLINE peer-reviewed index.

          Key findings

          Opens current human and preclinical literature matching NAC (Pre/Post Drinking Use) and "Hepatoprotection in heavy drinkers". Filter by RCT, meta-analysis, or year on the results page.

          Open study
          Systematic reviewPubMed (NLM) · 1970

          PubMed: NAC (Pre/Post Drinking Use) — randomized controlled trial

          Live PubMed search

          Live results for "NAC (Pre/Post Drinking Use) randomized controlled trial" across the PubMed/MEDLINE peer-reviewed index.

          Key findings

          Opens current human and preclinical literature matching NAC (Pre/Post Drinking Use) and "randomized controlled trial". Filter by RCT, meta-analysis, or year on the results page.

          Open study
          Systematic reviewPubMed (NLM) · 1970

          PubMed: NAC (Pre/Post Drinking Use) — meta-analysis

          Live PubMed search

          Live results for "NAC (Pre/Post Drinking Use) meta-analysis" across the PubMed/MEDLINE peer-reviewed index.

          Key findings

          Opens current human and preclinical literature matching NAC (Pre/Post Drinking Use) and "meta-analysis". Filter by RCT, meta-analysis, or year on the results page.

          Open study
          Systematic reviewPubMed (NLM) · 1970

          PubMed: NAC (Pre/Post Drinking Use) — pharmacokinetics

          Live PubMed search

          Live results for "NAC (Pre/Post Drinking Use) pharmacokinetics" across the PubMed/MEDLINE peer-reviewed index.

          Key findings

          Opens current human and preclinical literature matching NAC (Pre/Post Drinking Use) and "pharmacokinetics". Filter by RCT, meta-analysis, or year on the results page.

          Open study
          Systematic reviewPubMed (NLM) · 1970

          PubMed: NAC (Pre/Post Drinking Use) — safety adverse events

          Live PubMed search

          Live results for "NAC (Pre/Post Drinking Use) safety adverse events" across the PubMed/MEDLINE peer-reviewed index.

          Key findings

          Opens current human and preclinical literature matching NAC (Pre/Post Drinking Use) and "safety adverse events". Filter by RCT, meta-analysis, or year on the results page.

          Open study
          Systematic reviewPubMed (NLM) · 1970

          PubMed: NAC (Pre/Post Drinking Use) — dose response

          Live PubMed search

          Live results for "NAC (Pre/Post Drinking Use) dose response" across the PubMed/MEDLINE peer-reviewed index.

          Key findings

          Opens current human and preclinical literature matching NAC (Pre/Post Drinking Use) and "dose response". Filter by RCT, meta-analysis, or year on the results page.

          Open study
          Systematic reviewGoogle Scholar · 1970

          Google Scholar: NAC (Pre/Post Drinking Use) — clinical evidence

          Live Scholar search

          Cross-database citation index for NAC (Pre/Post Drinking Use) as it relates to "clinical evidence".

          Key findings

          Includes preprints, theses, and journal articles. Useful for tracking citation counts and follow-on work.

          Open study
          Educational use only. This profile is not medical advice. Consult a qualified healthcare professional before starting any supplement, especially if you take prescription medication or have a chronic condition.