A review of 54 studies found molecular evidence of anti-diabetic activity in 16 medicinal plants, although researchers cautioned that nearly all findings came from laboratory and animal studies rather than human clinical trials.
By yourNEWS Media Newsroom
A broad review of medicinal plant research has identified Gymnema, white mulberry, red ginseng and pomegranate as the four plants with the strongest molecular evidence of potential anti-diabetic effects.
The study examined 54 scientific papers covering 16 medicinal plants and found that many of their active compounds appear to act on biological pathways involved in glucose absorption, insulin signaling, oxidative stress and pancreatic function.
Researchers emphasized, however, that nearly all of the available evidence comes from cell cultures and animal experiments rather than human clinical trials. The findings therefore suggest areas for further study but do not establish that any of the plants can prevent, treat or cure diabetes in people.
Diabetes affects an estimated 589 million adults worldwide, according to 2024 figures from the International Diabetes Federation. More than 80% of those cases are in low- and middle-income countries, where the cost and availability of conventional treatment can create substantial barriers to care.
The review was published June 3 in The Open Biochemistry Journal.
The research team was led by Sara Ouari of University Ferhat Abbas Sétif 1 in Algeria and included colleagues in Algeria and Greece.
Researchers searched Scopus, ScienceDirect and Google Scholar for relevant studies published between 2000 and 2025.
They initially identified nearly 1,250 records before narrowing the review to 54 studies that documented molecular evidence of anti-diabetic activity involving 16 medicinal plants.
The work received no outside funding.
Although the plants came from different botanical families, the review found that many appeared to affect the same general biological targets.
Their active components included flavonoids, polyphenols, alkaloids and saponins.
According to the review, those compounds may inhibit digestive enzymes that break carbohydrates into glucose, strengthen insulin signaling that helps cells remove glucose from the bloodstream and reduce oxidative damage affecting the pancreas, liver and kidneys.
Gymnema sylvestre, commonly called “Gurmar,” was among the most thoroughly studied plants included in the review.
Compounds known as gymnemic acids appeared to reduce glucose absorption, encourage insulin release and protect pancreatic beta cells, which are responsible for producing insulin.
White mulberry contained two compounds identified as rutin and quercetin-3-O-?-D-glucoside.
The review said those compounds activated the AMPK and Akt pathways, which play important roles in cellular glucose uptake and energy regulation.
Red ginseng, produced by steaming and drying Panax ginseng, contains active compounds known as ginsenosides.
Those compounds were associated with improved insulin sensitivity and regulation of oxidative stress in the studies reviewed.
Pomegranate received a top evidence rating because of its phenols, tannins and triterpenoids.
Pomegranate flower extracts reduced blood glucose in animal studies, while peel extracts appeared to restore natural antioxidant defenses.
The authors cautioned that laboratory results do not necessarily translate into meaningful benefits for people.
Most of the plants have not been tested in sufficiently large, controlled human trials, and laboratory doses may be substantially higher than the amount delivered through food, tea or supplements.
The findings should not be used as a reason to discontinue prescribed medication or replace established diabetes care.
Three of the four leading plants are commonly consumed as foods or beverages.
Fresh pomegranate seeds can be added to yogurt or salads, while 100% pomegranate juice without added sugar is another available form.
White mulberry is sold as dried berries, tea and leaf extract.
Red ginseng is commonly prepared as tea.
Gymnema is primarily sold as a dietary supplement, although its leaves can also be brewed into an herbal tea.
The review’s findings are consistent with broader nutritional evidence supporting diets rich in fiber, adequate protein and colorful, polyphenol-dense plant foods as a foundation for blood sugar management.
The absence of outside funding also highlighted the difficulty of conducting large clinical trials on plants and natural compounds that cannot easily be patented.
Unlike proprietary drugs, foods such as pomegranate and white mulberry generally offer limited commercial incentive for companies to finance expensive studies involving standardized extracts, human participants and carefully controlled dosing.
The lack of pharmaceutical funding does not prove that the plants are effective, but it leaves important questions unresolved.
Researchers said human studies are needed to determine appropriate doses, potential side effects, medication interactions and whether the biological effects observed in laboratories produce measurable improvements in patients.
Until those trials are completed, Gymnema, white mulberry, red ginseng and pomegranate remain promising subjects for further research rather than proven substitutes for conventional diabetes treatment.
Source: Natural News
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