Mango leaf extract stimulated GLP-1 secretion from gut cells and lowered blood sugar, weight, and cholesterol in diabetic rats comparably to sitagliptin, a widely used diabetes drug.
Comparable to sitagliptinMango leaf extract raised serum GLP-1 levels in diabetic rats to a degree comparable to the prescription DPP-4 inhibitor
What the researchers found
Mango leaf extract (MLE) stimulated GLP-1 secretion from intestinal L-cells through two signaling pathways (MAPK and Wnt), and when given to diabetic rats at 40 mg/kg, it significantly reduced fasting blood glucose, body weight, cholesterol, triglycerides, and HbA1c. MLE also lowered DPP-IV levels (the enzyme that breaks down GLP-1), resulting in increased circulating GLP-1 comparable to the diabetes drug sitagliptin.
The active compound mangiferin was identified at 165.67 μg/g in the crude extract, and molecular docking confirmed its interaction with the relevant signaling proteins.
Why it matters
GLP-1-based drugs like semaglutide and sitagliptin are blockbuster treatments for diabetes and obesity, but they're expensive and require prescriptions. If a natural plant extract can stimulate the body's own GLP-1 production through the same pathways, it could offer an accessible supplement option — though this has only been shown in rats and cell cultures so far.
The numbers in context
MLE dose: 40 mg/kg · Mangiferin: 165.67 ± 10.88 μg/g · Extract yield: 12.07% w/w · Reduced FBG, HbA1c, CHOL, TG · Lowered HOMA-IR · GLP-1 increase comparable to sitagliptin
How the study worked
The study combined cell culture experiments (NCI-H716 intestinal L-cells to test GLP-1 secretion and signaling pathways), molecular docking (computer modeling of mangiferin's interactions with target proteins), and an in vivo study in type 2 diabetic Sprague-Dawley rats receiving MLE at 40 mg/kg orally. Metabolic parameters were measured including blood glucose, insulin, HbA1c, lipids, DPP-IV, and GLP-1.
Who was studied
NCI-H716 intestinal L-cells (in vitro) and type 2 diabetic Sprague-Dawley rats (in vivo)
What this study cannot tell us
This is an animal and cell culture study — the results have not been tested in humans. The diabetic rat model may not fully replicate human type 2 diabetes. Specific sample sizes for the animal groups were not stated in the abstract. The long-term safety and efficacy of MLE at these doses is unknown, and bioavailability in humans could differ significantly.
How to read the evidence
This is preliminary evidence from cell culture and animal experiments. While the mechanistic data is detailed and the comparison to sitagliptin is notable, no human trials have been conducted. Animal diabetes models have limited translational value.
When this study was published
Published in 2025, this is very recent research that reflects the growing interest in natural compounds that can activate GLP-1 pathways, an area energized by the success of GLP-1 receptor agonist drugs.
The bigger picture
GLP-1-based therapies are among the most important drug developments in decades, transforming treatment for diabetes and obesity. This study explores whether natural compounds can tap into the same GLP-1 pathway. If validated in humans, plant-derived GLP-1 stimulators could complement prescription drugs or serve as accessible preventive supplements — though the gap between rat studies and human medicine remains large.
Questions still open
- Would mango leaf extract produce meaningful GLP-1 increases in humans, given differences in gut absorption and metabolism?
- How does the GLP-1-stimulating effect of mangiferin compare to other natural compounds that activate L-cells?
- Could mango leaf extract be used alongside GLP-1 receptor agonists or DPP-4 inhibitors, or would the effects overlap redundantly?
Common questions
Can drinking mango leaf tea boost your GLP-1 levels like a GLP-1 drug?
What is mangiferin and why does it matter for diabetes?
Read the original research
Molecular Mechanisms and Antidiabetic Effects of Mango (Mangifera indica) Leaf Extract as a GLP-1 Analogue in Type 2 Diabetic Rats.
International journal of molecular sciences, 26(24)
Citation
Jariyapongskul, Amporn; Boonsri, Pornthip; Sungwienwong, Itthipol; Dolsophon, Kulvadee; Apiratikul, Nuttapon; Jittangprasert, Piyada; Sitthisuk, Pornnapa; Rungsiwiwut, Ruttachuk; Samosorn, Siritron; Suksamrarn, Sunit; Watanapokasin, Ramida. (2025). Molecular Mechanisms and Antidiabetic Effects of Mango (Mangifera indica) Leaf Extract as a GLP-1 Analogue in Type 2 Diabetic Rats.. International journal of molecular sciences, 26(24). https://doi.org/10.3390/ijms262412149