Jiaogulan is a climbing vine native to southern China and Southeast Asia, used for centuries as an herbal tea and traditional medicine. Its formal botanical name is Gynostemma pentaphyllum, and it belongs to the cucumber and melon family (Cucurbitaceae). Often called “the immortality herb,” jiaogulan earned that nickname from regions in southern China where daily tea drinkers appeared to live unusually long lives. Today it draws interest primarily for its effects on blood sugar, cholesterol, and energy metabolism.
The Plant and Where It Grows
Jiaogulan is a leafy, tendril-climbing herb with five-pointed leaves, which is why it’s sometimes called “fiveleaf gynostemma.” It grows across a wide swath of Asia: China, Vietnam, Thailand, Malaysia, Korea, Japan, India, Bangladesh, Nepal, Sri Lanka, Myanmar, Laos, and even parts of New Guinea. Of the 16 to 19 species in its genus, Gynostemma pentaphyllum is by far the most studied and widely consumed, with hundreds of published studies indexed in medical databases.
The plant was first documented as an edible herb in a Chinese text called “Herbs for Famine,” published during the Ming Dynasty (1368 to 1644 AD). It was originally valued as a food source, not a medicine. Its medicinal reputation came later, particularly after China’s first nationwide census in 1970 revealed something unusual in remote villages of the Guizhou, Guangxi, and Sichuan provinces: an abnormally high percentage of residents living past 100 with very low rates of cancer and age-related disease. Researchers investigating the pattern found one common thread among these centenarians: they regularly drank tea brewed from a wild vine they called “Xiancao,” or the immortality herb.
Why It’s Compared to Ginseng
Jiaogulan’s most notable chemistry involves a class of plant compounds called gypenosides. These are structurally similar to the ginsenosides found in Panax ginseng, which is why jiaogulan is sometimes marketed as “southern ginseng” or “poor man’s ginseng.” But the comparison undersells its complexity. Researchers have now characterized over 1,100 saponin compounds in the plant, with 588 accurately identified so far. That dwarfs the chemical diversity of ginseng itself.
This chemical richness likely explains the broad range of effects attributed to the plant. Gypenosides appear to influence several key metabolic pathways in the body, including one enzyme in particular that acts as a master energy switch in your cells.
How It Affects Your Metabolism
Much of jiaogulan’s activity traces back to an enzyme called AMPK, which your body activates when cells need more energy. Think of AMPK as a fuel gauge: when energy runs low, it flips on processes that burn stored fat, build new mitochondria (your cells’ power generators), and improve how efficiently your body uses glucose. Exercise is one of the strongest natural AMPK activators. Jiaogulan appears to trigger some of the same pathways.
In cell studies, jiaogulan extracts increase AMPK activation directly. Animal research has shown that activating this enzyme leads to increased mitochondrial production in skeletal muscles, essentially giving cells more capacity to generate energy. This is the same adaptation that happens with regular aerobic exercise, which is why researchers describe AMPK activators as “exercise mimetics,” compounds that simulate some benefits of physical activity.
Blood Sugar and Insulin Sensitivity
The most robust human evidence for jiaogulan involves blood sugar control. In a clinical trial of people with type 2 diabetes, those who drank jiaogulan tea saw their fasting blood glucose drop by an average of 1.9 mmol/L, compared to just 0.2 mmol/L in the placebo group. That’s a meaningful difference. When researchers switched the groups (giving the tea to the former placebo group and vice versa), the effect reversed, strengthening the case that the tea itself was responsible.
Beyond simple blood sugar numbers, the tea also improved insulin sensitivity. A key measure of how well your body responds to insulin dropped significantly after jiaogulan treatment, meaning cells were absorbing glucose from the bloodstream more efficiently. Over a 12-week period, insulin resistance scores also decreased. These findings suggest that jiaogulan doesn’t just lower blood sugar in the moment; it helps the underlying mechanism work better.
Exercise Performance
A study in healthy men found that Gynostemma pentaphyllum supplementation improved endurance exercise performance and altered how mitochondria function in the body. The proposed mechanism circles back to AMPK activation: by prompting cells to build more mitochondria, the supplement may increase the body’s capacity for sustained physical effort. In animal studies, strong AMPK activation enhanced running speed by 23% and increased distance covered by 44% in sedentary mice, though human effects are more modest.
The practical takeaway is that jiaogulan may complement exercise rather than replace it. It appears to nudge the same cellular machinery that training activates, which could make workouts feel slightly easier or help the body adapt to physical stress more efficiently.
Other Potential Effects
Jiaogulan has been studied for a range of additional effects, though the evidence for most is still limited to animal or cell research. It shows anti-inflammatory activity by suppressing key inflammatory signaling pathways. It activates a cellular defense system that ramps up your body’s own antioxidant production, protecting cells (particularly neurons) from oxidative damage. Early research suggests potential relevance for cholesterol management, weight loss, and neuroprotection, but these areas need more human trials before firm conclusions are possible.
One obesity trial used 225 mg of jiaogulan extract twice daily for 12 weeks in a double-blind, placebo-controlled design, a format that helps rule out the placebo effect. Traditional use in East Asian countries has long targeted conditions like high blood pressure, high cholesterol, and excess weight, so researchers are gradually testing whether those folk applications hold up under controlled conditions.
How People Use It
The most traditional preparation is a simple tea brewed from dried leaves. In clinical trials, participants typically used 6 grams of dried herb per day, split into two doses taken 30 minutes before meals. Traditional medicine recommends 3 to 9 grams of dried leaves daily.
Standardized extracts are also available in capsule form. Some references cite 20 mg tablets containing 85% gypenosides taken two to three times daily as a general wellness dose, with higher amounts (around 60 mg, two to three times daily) suggested for more targeted use. However, solid clinical data supporting those specific extract doses is limited. The tea form has the most direct evidence behind it from human trials.
Jiaogulan tea has a mildly sweet, slightly bitter taste, sometimes described as similar to green tea but earthier. It contains no caffeine, which makes it suitable for evening consumption.
Safety Considerations
Jiaogulan has been consumed as a food and tea for centuries with no widely documented serious adverse effects. Clinical trials have not reported significant side effects at standard doses. However, formal research on drug interactions is thin. None of the randomized controlled trials on jiaogulan have systematically tracked or reported herb-drug interactions, which means the absence of reported problems isn’t the same as confirmed safety when combined with medications.
Given its effects on blood sugar and its potential to influence blood clotting pathways, people taking diabetes medications, blood thinners, or immunosuppressants should be cautious. The herb’s ability to lower blood glucose could theoretically amplify the effects of diabetes drugs, raising the risk of blood sugar dropping too low. If you take any prescription medications, it’s worth discussing jiaogulan with your prescriber before adding it to your routine.