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Glycerol Monostearate UK: Benefits, User Reports & Evidence
Supplement
Glycerol Monostearate
Also known as Glyceryl monostearate, Glycerol 1-stearate, glycerol hyperhydration
Glycerol esterified with stearic acid, used as an emulsifier and as a glycerol carrier for pre-exercise hyperhydration; studied for its effect on fluid retention, thermoregulation and endurance performance.
Summaries of published trial results for this compound, grouped by condition. In these tables every number is exactly as the researchers published it. The headline figures above show a simple average where several studies measured the same thing in the same unit, and say so; nothing else is calculated or converted.
How to read this table
Benefit
What the trial saw happen: whether the measured outcome moved in the helpful direction in that one study (the tag on each row: “Benefit seen”, “No clear benefit”, “Possible harm” or “Unclear”). It is a study result — not advice, and not a promise it will work for you.
Evidence
How strong the research behind that result is. A meta-analysis pools many studies (strongest); a systematic review collates them; an RCT tests against a control (placebo); observational studies only watch — they can suggest, not prove.
Effect size
How large the measured change was, exactly as the researchers published it. “No number reported” means the abstract gave no effect size — we never invent one.
In short: benefit is what was observed; evidence is how much you should trust the observation. A “Benefit seen” tag on a weak study counts for far less than the same tag on a meta-analysis.
Endurance (32 outcomes)
Outcome measured
What trials found
Effect size
People studied
Duration
Type of evidence
Study
Body temperature post-performance task
Pre-exercise oral hyperhydration did not significantly improve Body temperature post-performance task (p = 0.349) compared with placebo. (p = 0.349)No clear benefit
Important: This page reflects observational, aggregate-only community reporting and independent published research. It is not medical advice, and it does not claim any compound treats, cures, or is effective for any condition. Always consult a qualified healthcare professional before starting, stopping, or changing any supplement or treatment.
Availability
Where to get Glycerol Monostearate (UK)
How this compound is sold in the UK, and where our readers typically find it.
Retailer search links — we may earn commission on purchases at no cost to you. Commission never affects our evidence ratings.
Pre-exercise oral hyperhydration did not significantly improve Heart rate following steady state (SS) exercise (p = 0.069) compared with placebo. (p = 0.069)No clear benefit
Pre-exercise oral hyperhydration improved Time trial (TT) (0.25; 95% CI: 0.002-0.51; p = 0.049) compared with placebo. (95% CI: 0.002-0.51; p = 0.049)Benefit seen
Glycerol- and sodium-induced hyperhydration improved Fluid retention (1189 mL; 95% CI 987-1391, P < .001) compared with placebo in 13 (180-minute). (95% CI 987-1391, P < .001)Benefit seen
Glycerol- and sodium-induced hyperhydration did not significantly improve Gastrointestinal symptoms (P > .05) compared with placebo in 13 (180-minute). (P > .05)No clear benefit
Glycerol- and sodium-induced hyperhydration did not significantly improve Gastrointestinal temperature (P > .05) compared with placebo in 13 (180-minute). (P > .05)No clear benefit
Glycerol- and sodium-induced hyperhydration did not significantly improve Heart rate (P > .05) compared with placebo in 13 (180-minute). (P > .05)No clear benefit
Glycerol- and sodium-induced hyperhydration improved Plasma volume (9.0%; 95% CI 3.6-14.4, P = .001) compared with placebo in 13 (180-minute). (95% CI 3.6-14.4, P = .001)Benefit seen
Pre-exercise hyperhydration improved Body mass loss at end of exercise (1.7+/-0.3% %; 3.3+/-0.4% %; p<0.05) compared with pre-exercise euhydration in 6 (2 h). (p<0.05)Benefit seen
Glycerol improved Forearm blood flow (17.1 +/- 1.5 vs. 13.7 +/- 3.0 ml x 100 g tissue x min(-1); p < .05) compared with placebo in 6. (p < .05)Benefit seen
Glycerol ingestion (GEH) improved endurance time (ET) (93.8 +/- 14 min min; 77.4 +/- 9 min min; p = 0.049) compared with placebo in 11 (Study I). (p = 0.049)Benefit seen
Glycerol ingestion (GEH) improved endurance time (ET) (123.4 +/- 17 min min; 99.0 +/- 11 min min; p = 0.03) compared with placebo in 7 (Study II). (p = 0.03)Benefit seen
Important: This page reflects observational, aggregate-only community reporting and independent published research. It is not medical advice, and it does not claim any compound treats, cures, or is effective for any condition. Always consult a qualified healthcare professional before starting, stopping, or changing any supplement or treatment.