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Head-to-head evidence comparison — which supplement is right for you?
Glucomannan wins 2 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Likely helps
12 of 13 studies with measurable effects showed benefit.
Top outcomes
Verdict
Mostly mechanism / observational
2 of 2 studies with measurable effects showed benefit.
Top outcomes
1g three times daily before meals (3g total)
30-60 minutes before meals, With 1-2 glasses of water, Before largest meals for weight loss
Capsules (safest)
300–500 mg daily
Morning with breakfast, Split dosing (morning and midday) for doses above 500 mg
Nicotinamide Riboside Chloride capsules or powder
30-60 minutes
4-8 weeks
4-8 weeks
If improperly taken
1–2 weeks
4–8 weeks
8–16 weeks
4–8 weeks
Effect of glucomannan on plasma lipid and glucose concentrations, body weight, and blood pressure: systematic review and meta-analysis
The American journal of clinical nutrition (2008) · Meta analysis · n=531
Glucomannan appears to beneficially affect total cholesterol, LDL cholesterol, triglycerides, body weight, and FBG, but not HDL cholesterol or BP.
The Impact of Glucomannan, Inulin, and Psyllium Supplementation (Soloways(TM)) on Weight Loss in Adults with FTO, LEP, LEPR, and MC4R Polymorphisms: A Randomized, Double-Blind, Placebo-Controlled Trial
Nutrients (2024) · Rct · n=112
The experimental group showed significant reductions in body weight (treatment difference: -4.9%; 95% CI: -6.9% to -2.9%; p < 0.01) and BMI (treatment difference: -1.4 kg/m2; 95% CI: -1.7 to -1.2; p < 0.01) compared to placebo.
Comparative effects of nutraceuticals on body weight in adults with overweight or obesity: A systematic review and network meta-analysis of 111 randomized clinical trials
Pharmacological research (2023) · Meta analysis · n=6171
We conducted random-effects network meta-analysis with a Frequentist framework to estimate mean difference [MD] and 95% confidence interval [CI] of the effect of nutraceuticals on weight loss.
The Effect of Nicotinamide Mononucleotide and Riboside on Skeletal Muscle Mass and Function: A Systematic Review and Meta-Analysis.
Journal of cachexia, sarcopenia and muscle (2025) · Meta analysis
Systematic review and meta-analysis of RCTs evaluating NMN and NR effects on skeletal muscle mass and function
NAD+ supplementation for anti-aging and wellness: A PRISMA-guided systematic review of preclinical and clinical evidence.
Ageing research reviews (2026) · Systematic review
PRISMA-guided systematic review of both preclinical and clinical NAD+ supplementation literature
NAD+ therapy in age-related degenerative disorders: A benefit/risk analysis.
Experimental gerontology (2020) · Systematic review
Systematic review of 147 articles (113 preclinical, 34 clinical) on NAD+ precursor therapy
Meta-analysis of 6 RCTs (n=225) showed modest but significant weight reduction vs placebo. Effects appear greater in females. Limited long-term data available.
Based on 8-week RCT showing dose-dependent increases of 22%, 51%, and 142% at 100, 300, and 1000mg respectively. Individual response varies significantly (30% show variable response). NR-SAFE trial confirmed safety up to 2000mg.
AI-estimated from published studies. Interpret as directional guidance.
Glucomannan has a higher evidence score (6.5/10 vs 5.5/10) and wins in 2 of 3 categories.
For boost daily energy, Glucomannan has a higher relevance score (80 vs 78).
No known interactions between Glucomannan and Nicotinamide Riboside have been documented in our database. However, always consult a healthcare provider before combining supplements.