Gymnema Sylvestre
Research reviewed: Up until 03/2026
Gymnema Sylvestre (Gymnema sylvestre) is a dietary supplement with 10 published peer-reviewed studies involving 460 participants, researched for Blood Sugar Control, Sugar Cravings Reduction, Lipid Management.
Evidence at a Glance
Strength is scored by study design, sample size, study type, and outcomes
Blood Sugar Control
StrongSugar Cravings Reduction
ModerateLipid Management
ModerateResearch Visualised
Visual breakdown of the clinical data.
Study Quality Breakdown
What types of studies were conducted
Participants Per Study
Larger samples = more reliable results
Research Timeline
When the studies were published
All Studies
Detailed breakdown of each trial. Click to expand.
Blood Sugar Control
To assess GS4 extract (Gymnema) in insulin-dependent diabetes mellitus
Study Type
Open-label clinical study
Purpose
To assess GS4 extract (Gymnema) in insulin-dependent diabetes mellitus
Dose
400 mg/day GS4 extract
Participants
27 IDDM patients
Duration
6-30 months
Results
Gymnema reduced insulin requirements significantly. Fasting blood glucose and HbA1c reduced by approximately 30%. Five patients discontinued insulin during study.
How They Measured It
Fasting blood glucose, HbA1c, insulin requirements
To assess Gymnema sylvestre on type 2 diabetes
Study Type
Open-label clinical study
Purpose
To assess Gymnema sylvestre on type 2 diabetes
Dose
400 mg/day
Participants
22 type 2 diabetics
Duration
18-20 months
Results
Gymnema significantly reduced fasting glucose and HbA1c. Oral diabetes medication dosage was reduced in all patients. Five patients maintained glucose control with Gymnema alone.
How They Measured It
Fasting glucose, HbA1c, conventional medications
To assess Gymnema supplementation in type 2 diabetics
Study Type
Open-label supplementation study
Purpose
To assess Gymnema supplementation in type 2 diabetics
Dose
200 mg/day
Participants
47 type 2 diabetics
Duration
24 weeks
Results
Gymnema supplementation significantly improved HbA1c and fasting blood glucose, with improved beta-cell function. PMID: 22432517
How They Measured It
HbA1c, fasting glucose, insulin, lipids
To evaluate Gymnema sylvestre on glycaemic control in type 2 diabetes
Study Type
Systematic review and meta-analysis
Purpose
To evaluate Gymnema sylvestre on glycaemic control in type 2 diabetes
Dose
Various
Participants
Multiple RCTs
Duration
Various
Results
Gymnema significantly reduced FBG and HbA1c across included trials. Improvements in insulin sensitivity also observed. PMID: 34467577
How They Measured It
FBG, HbA1c, insulin, HOMA-IR, pooled analysis
Sugar Cravings Reduction
To examine Gymnema sylvestre on sugar cravings and sweet food intake
Study Type
Randomised controlled trial
Purpose
To examine Gymnema sylvestre on sugar cravings and sweet food intake
Dose
200 mg/day Gymnema extract
Participants
58 healthy adults
Duration
14 days
Results
Gymnema significantly reduced sweet food intake and sugar cravings. Gymnemic acids block lingual sweet taste receptors, reducing pleasantness of sweet foods. PMCID: PMC9788288
How They Measured It
Sweet food intake, sugar craving questionnaire
To investigate Gymnema on normoglycaemia, dyslipidaemia, and pancreatic gene expression
Study Type
Animal study
Purpose
To investigate Gymnema on normoglycaemia, dyslipidaemia, and pancreatic gene expression
Dose
100 mg/kg Gymnema sylvestre extract
Participants
Alloxan-induced hyperglycaemic rats
Duration
28 days
Results
Gymnema restored normoglycaemia, corrected dyslipidaemia, and modulated pancreatic and hepatic gene expression including insulin receptor and GLUT-2. PMCID: PMC10142569
How They Measured It
Blood glucose, lipid profile, hepatic and pancreatic gene expression
Lipid Management
To evaluate Gymnema extract on lipid profile in obese patients
Study Type
Randomised controlled trial
Purpose
To evaluate Gymnema extract on lipid profile in obese patients
Dose
300 mg/day
Participants
60 obese patients
Duration
12 weeks
Results
Gymnema significantly reduced total cholesterol, LDL-C, and triglycerides while improving HDL-C in obese patients.
How They Measured It
Total cholesterol, LDL-C, HDL-C, triglycerides, BMI
To investigate Gymnema mechanism on hepatic lipid metabolism
Study Type
Animal study
Purpose
To investigate Gymnema mechanism on hepatic lipid metabolism
Dose
50-100 mg/kg
Participants
Hyperlipidaemic rats
Duration
10 weeks
Results
Gymnema extract significantly inhibited cholesterol absorption, reduced HMG-CoA reductase activity, and improved lipid profile through multiple mechanisms.
How They Measured It
Hepatic lipid enzymes, cholesterol absorption, lipid profile
To evaluate standardised Gymnema on metabolic syndrome components
Study Type
Randomised controlled trial
Purpose
To evaluate standardised Gymnema on metabolic syndrome components
Dose
400 mg/day standardised extract
Participants
52 metabolic syndrome patients
Duration
12 weeks
Results
Gymnema significantly improved multiple components of metabolic syndrome including waist circumference, blood glucose, and triglycerides vs placebo.
How They Measured It
Metabolic syndrome criteria: waist, glucose, lipids, blood pressure
To investigate gymnemic acid mechanism on fat absorption
Study Type
In vitro study
Purpose
To investigate gymnemic acid mechanism on fat absorption
Dose
Various concentrations
Participants
Intestinal cell cultures and enzyme assays
Duration
N/A
Results
Gymnemic acids significantly inhibited pancreatic lipase activity and reduced fat absorption in intestinal cells, explaining additional metabolic benefits beyond glucose control.
How They Measured It
Oleic acid absorption, lipase inhibition, chylomicron formation
Frequently Asked Questions
Common questions about Gymnema Sylvestre research
There are currently 10 peer-reviewed studies on Gymnema Sylvestre (Gymnema sylvestre), involving 460 total participants. Research covers Blood sugar control, Sugar cravings reduction, Lipid management. The overall evidence strength is rated as Very Strong.
The evidence is currently rated as "Very Strong Evidence". This rating is based on study design quality (randomisation, blinding, placebo controls), sample sizes, study types (7 human studies, 2 animal studies), and reported outcomes.
Gymnema Sylvestre has been researched for: Blood sugar control, Sugar cravings reduction, Lipid management. Each area has its own body of evidence which you can explore in the study breakdowns above.
Yes, 7 out of 10 studies are human trials. The remaining 2 are animal studies. Human trials carry more weight in our evidence scoring system.
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