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Head-to-head evidence comparison — which supplement is right for you?
NAC wins 2 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Likely helps
8 of 9 studies with measurable effects showed benefit.
Top outcomes
Verdict
Mixed evidence
2 of 6 studies with measurable effects showed benefit.
Top outcomes
Shared outcomes (1)
Outcomes where both NAC and Reishi have evidence — compare verdict strength side-by-side.
600-1800mg daily
Away from food, Split into 2-3 doses
NAC capsules or powder
1-3g dried mushroom or 500-1500mg extract
Evening (for sleep), With or without food
Dual-extract (water + alcohol) capsules or powder
4-8 weeks
2-4 weeks
1-2 weeks
Immediate
4-8 weeks
2-4 weeks
4-8 weeks
Efficacy of N-Acetylcysteine in Polycystic Ovary Syndrome: Systematic Review and Meta-Analysis
Nutrients (2025) · Meta analysis · n=2515
NAC was associated with a statistically significant increase in progesterone (SMD 0.95, 95% CI: 0.13-1.77, p = 0.02) and endometrial thickness (SMD 0.58, 95% CI: 0.10-1.06, p = 0.02) compared to the placebo and other drugs (SMD 0.71, 95% CI: 0.48-0.94, p < 0.0001).
Efficacy of N-acetylcysteine for patients with depression: An updated systematic review and meta-analysis
General hospital psychiatry (2024) · Meta analysis · n=904
Our findings indicate that adjunctive NAC can ameliorate depressive symptoms in patients with psychiatric problems, particularly bipolar disorder.
N-acetylcysteine as a treatment for substance use cravings: A meta-analysis
Addiction biology (2024) · Meta analysis · n=623
The most targeted substance in the clinical trials was alcohol (3/9; 33.3%), followed by tobacco (2/9; 22.2%) and multiple substances (2/9; 22.2%).
Identifying immunostimulatory herbal supplements that may flare autoimmune skin diseases: a systematic scoping review
Lupus science & medicine (2025) · Systematic review · n=469
We identified 227 herbal supplements with immunostimulatory properties, of which 15 were most strongly supported by the evidence.
Ganoderma lucidum (Reishi) an edible mushroom; a comprehensive and critical review of its nutritional, cosmeceutical, mycochemical, pharmacological, clinical, and toxicological properties
Phytotherapy research : PTR (2021) · Systematic review
In particular, quality clinical data are intensely needed to support pharmacological activities for human use.
Use of Ganoderma lucidum (Ganodermataceae, Basidiomycota) as Radioprotector
Nutrients (2020) · Meta analysis
From a total number of 1109 records identified, 15 full text articles were eligible, none of them were clinical trials.
Meta-analysis showed efficacy particularly in bipolar disorder patients. Effect appears as adjunctive treatment. Individual response varies significantly.
Based on systematic reviews identifying immunostimulatory properties. Meta-analysis for cancer adjuvant therapy showed positive immune response (RR 1.50). Quality clinical data still needed. Effect varies significantly by extract type and standardization.
AI-estimated from published studies. Interpret as directional guidance.
NAC has a higher evidence score (8/10 vs 7/10) and wins in 2 of 3 categories.
For liver & detox support, NAC has a higher relevance score (90 vs 55).
No known interactions between NAC and Reishi have been documented in our database. However, always consult a healthcare provider before combining supplements.