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Head-to-head evidence comparison — which supplement is right for you?
Inositol vs NMN: Inositol has the stronger overall evidence (7 vs 5.5/10); they're alternatives for metabolic health — the best pick depends on your goals. Take the 60-second quiz for a pick tailored to your goals.
Inositol wins 3 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Probably helps
6 of 10 studies with measurable effects showed benefit.
Top outcomes
Verdict
Too few graded studies
1 of 1 studies with measurable effects showed benefit.
Top outcomes
2-4g for general anxiety; 12-18g for OCD/panic
Divided into 2-3 doses, With or without food
Myo-inositol powder (most economical for higher doses)
250-500mg
Morning, With or without food
NMN powder or capsules
4-6 weeks
6-12 weeks
3-6 months
First 1-2 weeks
2-4 weeks
2-4 weeks
Long-term
Antenatal dietary supplementation with myo-inositol for preventing gestational diabetes
The Cochrane database of systematic reviews (2023) · Meta analysis · n=1319
For the primary neonatal outcomes, only one study measured the risk of a large-for-gestational-age infant and found myo-inositol was associated with both appreciable benefit and harm (RR 1.40, 95% CI 0.65 to 3.02; 1 study, 234 infants; low-certainty evidence).
Inositol Nutritional Supplementation for the Prevention of Gestational Diabetes Mellitus: A Systematic Review and Meta-Analysis of Randomized Controlled Trials
Nutrients (2022) · Meta analysis · n=1321
Pooled results were expressed as relative risk (RR) or mean difference (MD) with a 95% confidence interval (95% CI).
Antioxidants for female subfertility
The Cochrane database of systematic reviews (2020) · Meta analysis · n=7760
Due to the very low-quality of the evidence we are uncertain whether antioxidants improve live birth rate compared with placebo or no treatment/standard treatment (odds ratio (OR) 1.81, 95% confidence interval (CI) 1.36 to 2.43; P < 0.001, I2 = 29%; 13 RCTs, 1227 women).
Effect of 12-Week Intake of Nicotinamide Mononucleotide on Sleep Quality, Fatigue, and Physical Performance in Older Japanese Adults: A Randomized, Double-Blind Placebo-Controlled Study
Nutrients (2022) · Rct · n=108
Significant interactions were observed between 5-STS and drowsiness. 5-STS of all groups on post-intervention and drowsiness of the NMN_PM and Placebo_PM groups on mid- and post-intervention showed significant improvement compared with those in pre-intervention.
Anti-inflammatory effects of nicotinamide mononucleotide (NMN) in human skeletal muscle after BFR-exercise
Journal of the International Society of Sports Nutrition (2026) · Rct · n=11
Randomised placebo-controlled crossover trial in 11 untrained young men taking NMN 1,200 mg a day for 7 days before blood flow restriction resistance exercise, with muscle biopsies.
The differential impact of three different NAD(+) boosters on circulatory NAD and microbial metabolism in humans
Nature metabolism (2026) · Rct · n=65
Ultimately, we propose a gut-dependent model for the modes of action of the three NAD+ precursors with NR and NMN elevating circulatory NAD+ via the Preiss-Handler pathway, while rapidly absorbed Nam acutely affects NAD+ levels via the salvage pathway.
The 300, 600 and 900 mg points come from a 60-day dose-ranging trial in 80 healthy middle-aged adults (PMID 36482258): every dose raised blood NAD against placebo, with the highest levels at 600 and 900 mg, and no safety issues up to 900 mg. The 250 mg point is a 12-week placebo-controlled trial in 60 older adults where blood NAD+ rose (PMID 38789831). A pharmaceutical formulation, MIB-626, gave dose-related NAD increases at 1,000 and 2,000 mg a day for 14 days (PMID 35182418) and is not plotted because it is a different formulation. A higher blood NAD level has not been shown to translate into clinical benefit.
AI-estimated from published studies. Interpret as directional guidance.
Inositol has a higher evidence score (7/10 vs 5.5/10) and wins in 3 of 3 categories.
For metabolic health, Inositol has a higher relevance score (85 vs 80).
No documented interaction was found in the data searched. This does not establish that this exact combination is safe.
Berberine, inositol, magnesium vs the cinnamon/chromium hype — and the med-interaction warning.
Selenium helps; iodine can WORSEN Hashimoto’s. The honest take on "thyroid support".
Folate is essential; inositol + CoQ10 are the best bets — but conception evidence is limited.
Inositol (40:1), and the supporting cast for insulin resistance, cycles & fertility.
The right pick depends on your goals. Answer a few quick questions for a personalised recommendation — or dig into the full evidence on each.