Conclusion: Based on the current data and clinician input, a range of nutraceuticals and phytoceuticals were given either a supportive recommendation or a provisional recommendation across a range of various psychiatric disorders. However several had only a weak endorsement for potential use; for a few it was not possible to reach a clear recommendation direction, largely due to mixed study findings; while some other agents showed no obvious therapeutic benefit and were clearly not recommended for use. It is the intention of these guidelines to inform psychiatric/medical, and health professional practice
PubMed 35311615 ↗N-Acetyl-Cysteine
People mainly take N-Acetyl-Cysteine for mood, focus, anxiety. Based on 9 first-hand reports and 67 meta-analyses & systematic reviews in the medical literature. Ranked #483 of 1,974 overall.
Of reports that state an outcome, 67% are positive.
What N-Acetyl-Cysteine does, according to users
Of the people who reported each effect, the share who said it got better.
What the research says
Systematic reviews and meta-analyses from PubMed, with their published conclusions.
3+ meta-analyses or systematic reviews and 10+ randomized controlled trials in humans. The grade measures how much human research exists — read the conclusions below for what it found.
Conclusion: Although 22 trials could be included in this review, the evidence provided is limited and mostly not relevant to clinicians or consumers. Overall, although there was low risk of attrition and selective data reporting bias within the trials, the trials themselves were not adequately powered and need more substantial follow-up periods. There is a need for larger trials with longer periods of follow-up to be conducted. Outcomes should be meaningful for those with schizophrenia, and include measures of improvement and relapse (not just rating scale scores), functioning and quality of life and acce
PubMed 26848926 ↗Conclusion: In this review, there was very low-quality evidence to show that taking an antioxidant may provide benefit for subfertile women, but insufficient evidence to draw any conclusions about adverse events. At this time, there is limited evidence in support of supplemental oral antioxidants for subfertile women.
PubMed 28752910 ↗Conclusion: Our findings indicate that NAC showed better survival and lower mortality rate when compared to non-NAC treated group; hence NAC can be considered for the management of rodenticide poisoning.
PubMed 34455951 ↗Dosage people report
As stated by users — not a recommendation. Follow the label or your doctor.
Reported side effects
How often each side effect came up across all reports.
What users say
Verbatim quotes, shortened only — each links to the original discussion.
“actually works a lot better than n-acetyl-cysteine”
“NAC has been useful in a bit of mood regulation and helping to prevent overeating and impulsivity”
“NAC decreased severe treatment resistant depression and ocd 30%- benefit at one week to one month. Still benefiting at 8 months. No tolerance.”
“N-Acetyl-Cysteine”
“NAC is an absorbable form from the diet. It's been shown to improve resistance to, and reduce severity of, respiratory infections.”
Top discussions (5)
- Methyl Donors as NMDA Antagonists: L-Methionine (SAM-e precursor) Mediates Resilience to Chronic Social Defeat Stress by Epigenetic Downregulation of NMDA Receptors [2020] ↗
- Nootropics Experience Report (3 Months) ↗
- Lets talk about L-theanine, N-acetyl-cysteine, N-acetyl-tyrosine ↗
- **NEUROPLASTICITY**: Such a thing as too much? How BDNF supplements (like Lion's Mane) could be causing me to read words wrong and have memory issues ↗
- The 14 Most Effective Supplements for Anxiety ↗
Other options for mood
User data from public discussions; research from PubMed. Information only, not medical advice — talk to a doctor before starting, stopping or combining anything. Data updated October 2, 2026. How we rate