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Head-to-head evidence comparison — which supplement is right for you?
Glucomannan and Potassium are closely matched across evidence, studies, and safety.
Verdict
Likely helps
12 of 13 studies with measurable effects showed benefit.
Top outcomes
Verdict
Probably helps
10 of 15 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)
99-500mg daily from supplements (food provides more)
With food to reduce GI upset, Spread throughout day, During/after exercise for athletes
Potassium Citrate or Potassium Gluconate
30-60 minutes
4-8 weeks
4-8 weeks
If improperly taken
2-4 weeks
1-2 weeks
Long-term
With excess or kidney issues
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.
Effect of changes in potassium intake on blood pressure: a dose–response meta-analysis of randomized clinical trials (2000–2024)
Clinical Kidney Journal (2025) · Meta analysis · n=2500
Dose-response analysis of RCTs from 2000-2024
Magnesium and Potassium Supplementation for Systolic Blood Pressure Reduction in the General Normotensive Population: A Systematic Review and Subgroup Meta-Analysis for Optimal Dosage and Treatment Length
Nutrients (2024) · Meta analysis
Both supplements demonstrated greater reductions in SBP for the general population at lower dosages and longer treatment durations.
Sex-specific associations between sodium and potassium intake and overall and cause-specific mortality: a large prospective U.S. cohort study, systematic review, and updated meta-analysis of cohort studies
BMC medicine (2024) · Meta analysis · n=237036
Meta-analysis examining Potassium efficacy
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.
AI-estimated from published studies. Interpret as directional guidance.
Both Glucomannan and Potassium are closely matched — the best choice depends on your specific health goals.
For reduce inflammation, Potassium has a higher relevance score (85 vs 65).
No known interactions between Glucomannan and Potassium have been documented in our database. However, always consult a healthcare provider before combining supplements.