Jiaogulan and Sleep: What the Research Shows
- , by SANUSq Research team
- 13 min reading time
Jiaogulan is often sold as a calming evening herb, and its nickname, "southern ginseng", adds to the sense that it must do something for rest. But if you look for solid jiaogulan sleep research, you find a wide gap between what tradition says and what has actually been tested in people. This article sets out both, honestly.
What is jiaogulan?
Jiaogulan (Gynostemma pentaphyllum) is a climbing vine in the cucumber family that grows across southern China and South-East Asia. Its dried leaves have long been brewed as a tea.
Its characteristic compounds are called gypenosides. They are saponins, and some are structurally similar to the ginsenosides found in ginseng. That resemblance explains the nickname, and it is also why jiaogulan is usually grouped with the adaptogens: plants described as helping the body cope with stress in general, rather than acting on one specific symptom.
A review of the plant's chemistry and pharmacology by Su et al. (2021) lists a broad range of biological activities attributed to Gynostemma pentaphyllum and its gypenosides, including effects on blood lipids, blood sugar and the nervous system. Almost all of this work comes from cell and animal experiments rather than studies in people.
Jiaogulan sleep evidence: what has actually been tested
To be direct: there is no clinical trial showing that jiaogulan improves sleep, and none showing it helps with insomnia. As far as we can find, no published study in humans has measured sleep quality, the time it takes to fall asleep or night-time waking as its main outcome after jiaogulan.
The idea that it might help comes from three places. The first is traditional use as a soothing evening tea. The second is animal research on stress and anxiety. The third is a chain of reasoning: stress is one of the main drivers of poor sleep, so a plant that softens the stress response might, in principle, make sleep easier.
In a mouse study, Zhao et al. (2015) gave gypenosides orally for 10 days before exposing the animals to repeated stress. The treated mice showed less anxiety-like behaviour in standard tests, along with lower levels of the stress hormone corticosterone and changes in brain dopamine and serotonin. These are animal findings and say nothing directly about sleep in people.
There is one small human trial that comes closer to the question, although it looked at anxiety, not sleep.
Choi et al. (2019) randomly assigned 72 healthy Korean adults with chronic stress and moderate anxiety scores to a jiaogulan leaf extract (200 mg twice a day) or a placebo for eight weeks. The extract group showed a 16.8% greater reduction in trait anxiety, the main outcome, than the placebo group. Most other measures, including other anxiety scales and stress hormones, showed no significant difference.
Put together, the reasoning is plausible but unproven. A single modest result on one anxiety score, plus animal data, is not enough to call jiaogulan a sleep aid. Presenting it as one would be misleading.
The jiaogulan benefits that have been studied in people
Most human research on jiaogulan concerns metabolism, in small and short trials.
Park et al. (2014) ran a 12-week randomised, double-blind, placebo-controlled trial in 80 Korean adults with obesity. Those taking 450 mg a day of a heat-processed jiaogulan extract lost more body weight, body fat and abdominal fat than the placebo group, with no clinically significant safety concerns.
In a small crossover study in Vietnam, Huyen et al. (2013) gave people with newly diagnosed type 2 diabetes, who were not yet taking medication, either jiaogulan tea (6 g a day) or a placebo tea for four weeks each. Fasting blood glucose was lower after the jiaogulan period, and the authors linked this to improved insulin sensitivity.
A wider look at the evidence urges caution about how far these results can be taken.
A systematic review by Dai et al. (2022) gathered 22 randomised trials of jiaogulan in 2,407 people with abnormal blood lipids. Only one trial was judged at low risk of bias, and the certainty of most findings was rated low or very low. The authors noted that use for more than eight weeks appeared safe.
None of these studies measured sleep, and none of them justify describing jiaogulan as a treatment for anything. Jiaogulan also has no authorised health claim in the EU. What can fairly be said is that it is an actively researched plant with some early human findings on weight and blood sugar, and very little on sleep.
What is better established for sleep
If better sleep is your goal, it makes sense to start with the approaches that have the most evidence behind them. They are mostly about habits, not supplements.
Sleep habits that matter
- A fixed wake-up time, every day, including after a bad night and at weekends.
- A cool, dark, quiet bedroom.
- No caffeine after early afternoon. Its effects last far longer than most people expect.
- Dimmer light and fewer screens in the hour or two before bed.
- A short, repeatable wind-down routine, so your body learns the signal that sleep is coming.
CBT-I for persistent insomnia
For insomnia that has lasted three months or more, the approach with the strongest evidence is not a plant or a pill but cognitive behavioural therapy for insomnia, known as CBT-I. It combines techniques such as stimulus control, sleep restriction, relaxation and work on the worries that keep people awake.
A systematic review and meta-analysis by Trauer et al. (2015), pooling 20 randomised trials in 1,162 adults with chronic insomnia, found that CBT-I shortened the time taken to fall asleep by about 19 minutes and reduced time awake during the night by about 26 minutes. The improvements appeared to last after treatment ended, and no adverse effects were reported.
Other herbs and supplements
Among supplements, melatonin has the most research. Melatonin contributes to the reduction of time taken to fall asleep, with 1 mg taken close to bedtime, and to the alleviation of subjective feelings of jet lag, with at least 0.5 mg taken close to bedtime on the first day of travel and the following few days. Both are EU-authorised claims.
A meta-analysis of 19 placebo-controlled trials in 1,683 people by Ferracioli-Oda et al. (2013) found that melatonin shortened the time taken to fall asleep by about 7 minutes and lengthened total sleep by about 8 minutes, with a small improvement in overall sleep quality. The authors described these effects as modest.
Valerian, chamomile and passionflower all have a long history of evening use, but study results are mixed or limited. None of these options matches the evidence for good sleep habits and CBT-I.
How jiaogulan is taken
Traditionally, the dried leaves are steeped in hot water as a tea. Jiaogulan is also available as capsules of powdered leaf or extract. If you choose a product, it is worth looking for one that states the part of the plant used and, for extracts, the gypenoside content, rather than a vague description.
If you want to try it in the evening, a cup of jiaogulan tea can become part of a regular wind-down routine. Much of any benefit you notice may come from the routine itself, and that is not a criticism: a consistent signal that bedtime is approaching is one of the better-established ways to support sleep.
Why adaptogens often disappoint
Part of the problem lies in the word itself. An adaptogen is not meant to have a single, targeted effect. It is described as helping the body handle strain more generally. That is a broad idea, hard to measure and poorly suited to clinical trials, which need one clear outcome. As a result, research on these plants tends to be rich in laboratory work and thin on robust human trials, and marketing often promises more than the data allow.
Any effect is likely to be subtle and slow, best judged over weeks rather than by a single night's sleep.
Safety and precautions
Jiaogulan is generally well tolerated in short-term studies. Reported side effects are usually mild and digestive, such as nausea or loose stools. Even so, a few standard precautions apply:
- Diabetes medication. Because a trial observed lower blood glucose, jiaogulan could add to the effect of glucose-lowering medicines. Check with your doctor first.
- Blood thinners and antiplatelet medicines, such as warfarin, clopidogrel or aspirin. As a general precaution with herbs of this kind, ask your doctor before combining them, and stop jiaogulan before planned surgery.
- Immunosuppressants, or if you have an autoimmune condition. Herbs studied for effects on immune activity are best avoided with these medicines unless your doctor agrees, as a standard precaution.
- Pregnancy and breastfeeding. There is no safety data, so it is best avoided.
If poor sleep has lasted more than a few weeks, is affecting your daytime life, or comes with loud snoring, pauses in breathing, low mood or anxiety, please see your doctor. Persistent insomnia often has an underlying cause that deserves proper assessment, and effective help is available.
The bottom line
Jiaogulan is an actively researched plant with a handful of small human trials, mostly on weight and blood sugar, plus one on anxiety. On sleep, the evidence in people is essentially absent. If sleep is your concern, start with consistent sleep habits, consider CBT-I for long-standing insomnia, and see jiaogulan for what it is: a traditional herbal tea with a modest, still-uncertain place.
Frequently asked questions
Does jiaogulan help you sleep?
No clinical trial has shown that it does. Its reputation comes from traditional use and from the idea that easing stress might ease sleep. Human trials have looked at weight, blood sugar and anxiety, not sleep.
What are the main jiaogulan benefits studied in people?
Small trials have reported reductions in body fat in adults with obesity and lower fasting blood glucose in people with newly diagnosed type 2 diabetes. One eight-week trial found a modest reduction in trait anxiety in stressed adults. All were small and short.
Is jiaogulan the same as ginseng?
No. They are different plants from different families. Jiaogulan's gypenosides are chemically similar to some of ginseng's ginsenosides, which is why it is sometimes called "southern ginseng" and grouped with the adaptogens.
Can I drink jiaogulan tea before bed?
Jiaogulan tea is naturally caffeine-free, so many people drink it in the evening as part of a wind-down routine. Just don't expect it to work like a sleep aid. If you take diabetes medication, blood thinners or immunosuppressants, or you are pregnant, check with your doctor first.
What is the best natural approach to insomnia?
Regular sleep habits come first. For insomnia lasting three months or more, cognitive behavioural therapy for insomnia (CBT-I) has the strongest evidence. If poor sleep persists, see your doctor.
Are there any side effects of jiaogulan?
It is generally well tolerated in short-term studies, with mostly mild digestive effects reported. Take care if you use diabetes medication, blood thinners or immunosuppressants, and avoid it during pregnancy and breastfeeding because safety data is lacking.
Prefer a capsule to a cup of tea?
Jiaogulan (Gynostemma pentaphyllum) in capsule form — a convenient alternative to brewing the leaves.
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References
- Su C, Li N, Ren R, et al. Progress in the medicinal value, bioactive compounds, and pharmacological activities of Gynostemma pentaphyllum. Molecules. 2021;26(20):6249. PMID 34684830
- Zhao TT, Shin KS, Choi HS, Lee MK. Ameliorating effects of gypenosides on chronic stress-induced anxiety disorders in mice. BMC Complementary and Alternative Medicine. 2015;15:323. PMID 26370834
- Choi EK, Won YH, Kim SY, et al. Supplementation with extract of Gynostemma pentaphyllum leaves reduces anxiety in healthy subjects with chronic psychological stress: a randomized, double-blind, placebo-controlled clinical trial. Phytomedicine. 2019;52:198–205. PMID 30599899
- Park SH, Huh TL, Kim SY, et al. Antiobesity effect of Gynostemma pentaphyllum extract (actiponin): a randomized, double-blind, placebo-controlled trial. Obesity (Silver Spring). 2014;22(1):63–71. PMID 23804546
- Huyen VT, Phan DV, Thang P, Hoa NK, Östenson CG. Gynostemma pentaphyllum tea improves insulin sensitivity in type 2 diabetic patients. Journal of Nutrition and Metabolism. 2013;2013:765383. PMID 23431428
- Dai N, Zhao FF, Fang M, Pu FL, Kong LY, Liu JP. Gynostemma pentaphyllum for dyslipidemia: a systematic review of randomized controlled trials. Frontiers in Pharmacology. 2022;13:917521. PMID 36091752
- Trauer JM, Qian MY, Doyle JS, Rajaratnam SM, Cunnington D. Cognitive behavioral therapy for chronic insomnia: a systematic review and meta-analysis. Annals of Internal Medicine. 2015;163(3):191–204. PMID 26054060
- Ferracioli-Oda E, Qawasmi A, Bloch MH. Meta-analysis: melatonin for the treatment of primary sleep disorders. PLoS One. 2013;8(5):e63773. PMID 23691095
Read more on the blog
- Jiaogulan: The Adaptogen Known as the Herb of Immortality →
- 6 Best Herbal Teas for Sleep →
- GABA + Ashwagandha: A Natural Approach to Stress and Sleep →
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