PlainPill

NAC vs Niacin for mood

Short answer: For mood, more users report improvement with Niacin — 71% of 21 reports, versus 65% of 323 for NAC.

NAC has 387 meta-analyses and 767 randomized trials on PubMed; Niacin has 114 and 379.

Based on 2,058 reports about NAC and 269 about Niacin. Not medical advice.

NAC
Supplement
Niacin
Supplement
Users say it helped54%helped947 reports · high confidence71%helped94 reports · medium confidence
Verdict
Mixed
Mostly positive
ResearchAResearch: StrongAResearch: Strong
Meta-analyses / RCTs387 / 767114 / 379
Mainly used for
Mood
% reporting improvement
65% (323)71% (21)
Anxiety
% reporting improvement
90% (301)93% (14)
Focus
% reporting improvement
81% (170)100% (11)
Energy
% reporting improvement
73% (91)93% (15)
Sleep
% reporting improvement
71% (48)73% (11)
Common side effectsanhedonia, stomach issues, depression, emotional bluntingflushing, flush, stomach issues, liver damage
Typical dose reported600 mg100-200 mg
NAC
Latest review conclusion

Taken together, these preliminary findings suggest that dietetic approaches might be included as part of BD treatment. Also considering the high risk of metabolic disorders in individuals with BD, they should be encouraged to choose healthy dietary lifestyles, including daily intake of fruits, vegetables, seafood and whole grains.

Nutr Neurosci, 2023 ↗
What a user said
“NAC has helped me stay calm and reduce anxiety as well as gives me loads of energy if I am sleep deprived.”
Full NAC profile →
Niacin
Latest review conclusion

This guideline should enable addressing suboptimal and deficient status of a bundle of MNs in at-risk diseases. In particular, it offers practical advice on MN provision and monitoring during nutritional support.

Clin Nutr, 2022 ↗
What a user said
“If you over methylate, niacin may also help you. Binds to free methyl groups... It's how I fixed my heart palpitations after taking methylsulfonymethan.”
Full Niacin profile →

Related comparisons

Percentages come from first-hand user reports and are not clinical outcomes. Talk to a doctor before starting, stopping or combining anything. How we rate