NAC
IMPORTANT: NAC is not a peptide; it is an amino acid derivative (acetylated cysteine). It is a precursor of glutathione, the body's primary endogenous antioxidant. It has established medical use as a mucolytic (expectorant) and an antidote for acetaminophen/paracetamol poisoning. Popularized in biohacking for its antioxidant and anti-inflammatory potential.
Last updated:: 07/04/2026
Research Status
ANVISA (Brazil)
Approved
FDA (USA)
Approved
EMA (Europe)
Approved
Mechanism of Action
NAC is converted to cysteine in the body, which is the rate-limiting amino acid for glutathione (GSH) synthesis. Glutathione is the primary intracellular antioxidant, neutralizing free radicals and protecting cells from oxidative stress. NAC also has mucolytic properties (breaks mucus bonds) and modulates inflammatory pathways.
Study Protocols
Dosages and regimens used in published clinical studies. This does not constitute a medical prescription.
Antioxidante / suporte hepático / mucolítico
OralN-Acetilcisteína. Precursor de glutationa. Reduz exacerbações de DPOC. Antídoto para intoxicação por paracetamol em doses altas IV.
Benefits
Acetaminophen antidote
ProvenStandard treatment for acetaminophen/paracetamol overdose. Saves lives when administered early.
Mucolytic
ProvenApproved and widely used to thin pulmonary secretions in COPD, cystic fibrosis, and chronic bronchitis.
Mental health
Under researchMultiple clinical studies show benefits in obsessive-compulsive disorder, bipolar disorder, and trichotillomania.
View studyMale reproductive health
Under researchStudies show improvement in sperm quality and male fertility.
Risks and Side Effects
Nausea and gastrointestinal discomfort
Low(Common)Most common side effect, especially at high doses. Taking with food helps.
Unpleasant taste and odor
Low(Universal)NAC has a characteristic sulfurous taste (rotten egg smell). Capsules and sachets work around this.
Internet vs. Science
What people say online compared to the actual scientific evidence.
Cures long COVID
InconclusiveWhat they claim
NAC cures post-COVID symptoms and chronic fatigue.
Actual evidence
Some small studies suggest symptomatic benefits, but evidence is still limited and inconclusive. NAC does not 'cure' long COVID.
Detoxifies the body of heavy metals
Partially trueWhat they claim
NAC removes mercury and heavy metals from the body.
Actual evidence
Has mild chelating properties, but is not the first-line treatment for heavy metal poisoning. Use for 'detox' is not scientifically validated.
| Claim | O que dizem | Evidência real | Verdict |
|---|---|---|---|
| Cures long COVID | NAC cures post-COVID symptoms and chronic fatigue. | Some small studies suggest symptomatic benefits, but evidence is still limited and inconclusive. NAC does not 'cure' long COVID. | Inconclusive |
| Detoxifies the body of heavy metals | NAC removes mercury and heavy metals from the body. | Has mild chelating properties, but is not the first-line treatment for heavy metal poisoning. Use for 'detox' is not scientifically validated. | Partially true |
Studies and References (1)
Deepmala, Slattery J, Kumar N, et al. — Neuroscience & Biobehavioral Reviews (2015)
Revisão de 40+ ensaios clínicos demonstrando eficácia de NAC em transtornos psiquiátricos como TOC, esquizofrenia, depressão bipolar e adições.
PubMedFrequently Asked Questions
Can I buy NAC without a prescription in Brazil?
Yes. NAC is sold over the counter in Brazil under names such as Fluimucil, NAC, and others. It is widely used as a mucolytic.
Important notice
This content is strictly informational and educational, based on published scientific research. It does not constitute medical advice, prescription, or encouragement to use any substance. Always consult a qualified physician before starting any treatment.
Where to Buy
This compound is available as a supplement. Purchase from trusted retailers:
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