Dr. Ahmed Farhan
Scroll through sleep tips online, and two names keep popping up: melatonin and apigenin. Melatonin is the old favorite that sits on every pharmacy shelf.
Apigenin is the newer one, a plant chemical linked to chamomile tea and to popular “sleep stack” routines on podcasts and social media. Both promise easier sleep. But do they actually work? And are they safe to use night after night?
This article compares the two using the best research we could find. It also adds a twist that most sleep articles skip: what each one might mean for your blood sugar, which matters a lot if you care about diabetes, weight, or metabolic health.
A quick note before we start. We label how strong each piece of evidence is, using these words: established (many good human studies), emerging (some human studies, but small or mixed), observational (patterns in data, which cannot prove cause), hypothesis (an idea that is plausible but not proven in people), and expert opinion.
The quick answer
- Melatonin has real human trials behind it, but the benefit is small. In most studies of adults, it helps people fall asleep only a few minutes faster. Evidence: established, but modest.
- Apigenin capsules have almost no human sleep trials. Most of the human research is on chamomile, which contains apigenin plus many other plant chemicals. Evidence: emerging for chamomile, hypothesis for apigenin on its own.
- Melatonin may raise blood sugar in some people. A new 2026 study found that a common gene variant makes this more likely. Evidence: emerging.
- Neither one is the first thing doctors reach for. For ongoing insomnia, the top recommendation is a talk-based program called CBT-I (cognitive behavioral therapy for insomnia). Evidence: established.
What are apigenin and melatonin?
Melatonin is a hormone. Your brain makes it when the lights go down. Think of it less like a “sleep switch” and more like a clock signal that tells your body, “It’s nighttime now.” The melatonin in supplements is a lab-made copy of that hormone.
Apigenin is a plant chemical called a flavonoid. You find it in chamomile, parsley, celery, and other plants. In supplements, it is sold as an isolated capsule, often at far higher amounts than you would ever eat.
That difference matters. Melatonin is something your body already makes, and its main job is timing. Apigenin is a plant compound that scientists think might calm the brain, but that idea has mostly been tested in labs and animals.
How are they supposed to work?
Melatonin works on melatonin receptors in the brain. This helps shift or support the body clock. That is why it has its strongest track record for timing problems, such as jet lag or a body clock that runs very late.
Apigenin has a different story. In a well-known 1995 lab study, researchers found that apigenin can attach to a spot on brain cells called the benzodiazepine binding site. This spot is part of the same calming system that some prescription anxiety and sleep medicines use. In mice, apigenin reduced anxious behavior without making them sleepy at the doses tested. When the dose was ten times higher, it caused mild sleepiness.
But the picture is not settled. A later study in rats found that apigenin did not reduce anxiety, and its sleepy effect was not blocked by a drug that normally blocks that receptor. So apigenin may work in a different way, or not very strongly at all. Evidence: hypothesis (lab and animal studies only).
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What does the research say about apigenin?
Here is the honest answer: very little has been tested in people. We could not find a randomized controlled trial (the gold-standard type of study) that tested isolated apigenin capsules for sleep.
Several independent evidence summaries say the same thing, including that popular doses of 50 mg or more come from theory and animal studies, not from human trials.
What we do have is research on chamomile:
- A 2019 review pooled 12 randomized trials. It found that chamomile improved sleep quality, but there was only one trial on insomnia itself, and that trial found no clear change.
- A 2024 review looked at 10 studies with 772 people. Chamomile seemed to help people wake up less during the night or fall back asleep more easily. But it did not make sleep longer, and it did not improve sleep efficiency (the share of time in bed spent asleep) or how people felt during the day.
These studies were small and varied a lot. Chamomile is a promising, low-risk herb, but the proof is still thin. Evidence: emerging.
There is a catch. Chamomile is a mix of many compounds, so we cannot say apigenin caused the benefits. And here is some simple math: the chamomile extracts used in trials were often 400 to 560 mg a day, and one supplement retailer’s guide says they contain roughly 1% apigenin.
That works out to a few milligrams of apigenin. A 50 mg apigenin capsule is about ten times that amount. This is our rough estimate, not a measured fact, but it shows why a capsule is not simply “the chamomile trials, but stronger.”
What does the research say about melatonin?
Melatonin has been studied much more, and the results are consistent: it helps a little.
- A meta-analysis of 19 studies and about 1,700 people found that melatonin shortened the time to fall asleep by about 7 minutes and added about 8 minutes of sleep. The authors called the effect modest.
- A summary in the American Family Physician journal looked at 15 trials that used objective sleep measures. It found sleep onset came about 7 to 8 minutes sooner. It also notes that the American Academy of Sleep Medicine gave a weak recommendation against a 2 mg dose for insomnia and says CBT-I should come first.
- A 2022 review of 24 trials in people with long-term insomnia found that melatonin did not clearly help adults whose insomnia had no other cause. It did seem to help children and teens.
- A review that looked at dose and timing across 26 trials found the best effects around 4 mg a day, and that taking it earlier, about 3 hours before bed, might work better than the usual “30 minutes before bed.” This is a pooled analysis, so it points to an idea worth testing, not a rule. Evidence: emerging.
The bottom line: melatonin is best studied for timing problems (like jet lag or a very late body clock). For ordinary trouble falling asleep, the average gain is small. Evidence: established, but modest.
The label problem: what is really in the bottle?
Supplements are not checked the way medicines are. A 2023 study in JAMA tested 25 melatonin gummies sold in the United States.
Only 3 had an amount within 10% of the label. Amounts ranged from 74% to 347% of what the label claimed. One product had no melatonin at all but contained 31.3 mg of CBD.
This study tested only gummies, and only one bottle of each brand, so we do not know how common the problem is in capsules or tablets.
Still, it is a good reason to look for products that have been tested by an outside group, such as USP. The same worry applies to apigenin capsules, which have even less oversight data.
The blood sugar twist
This is where the story gets interesting for anyone worried about diabetes or weight.
Your body makes melatonin at night, and at night your body also handles sugar differently. Studies show that eating a big meal when your own melatonin is high leads to worse blood sugar control.
The effect is stronger in people who carry a common version of a gene called MTNR1B. This gene variant is linked to a higher risk of type 2 diabetes, and the researchers say about half of people carry it.
In June 2026, researchers from Mass General Brigham published a new study in Diabetes Care. They gave 21 healthy adults a single 5 mg melatonin dose on one day and a placebo (a dummy pill) on another. Neither the people nor the researchers knew which was which.
Here is what they found:
- In people with the gene variant, melatonin made blood sugar control worse. In people without the variant, it did not.
- Melatonin reduced the pancreas’s quick first burst of insulin when blood sugar rose.
- It also interfered with the body’s built-in “brake” that slows insulin release once enough has come out.
Now the limits. This was a small study of healthy adults, using a single dose in a lab. It does not show that taking melatonin for months causes diabetes. Older studies on melatonin and blood sugar have also pointed in different directions. Evidence: emerging.
Still, the authors say these findings support more personal guidance on melatonin, including when to take it in relation to meals. If you have prediabetes, diabetes, or a family history of type 2 diabetes, this is a good thing to ask your doctor or pharmacist about.
What about apigenin and blood sugar? In obese mice fed a high-fat diet, apigenin improved fasting blood sugar and insulin measures, although it did not change body weight.
Reviews of apigenin and metabolic health rely mostly on animal and lab work. Nobody has shown that apigenin capsules improve blood sugar or help with weight in people. Evidence: hypothesis.
Safety: what to know
Melatonin. For short-term use, melatonin is generally seen as low risk, and a large review found no clear sign of harm in many trials. But a few cautions are worth knowing:
- A study presented at the American Heart Association’s 2025 meeting looked at health records of more than 130,000 adults with insomnia. People who used melatonin for a year or more had about a 90% higher chance of a heart failure diagnosis, and nearly 3.5 times the chance of a hospital stay for heart failure, compared with similar people who did not use it.
- This was an observational study, and it was a conference presentation that had not yet been published in a peer-reviewed journal. It cannot prove melatonin caused the problem. People with worse insomnia, anxiety, or early heart problems may be more likely to take melatonin, which could explain part of the link. Evidence: observational and preliminary.
- The takeaway many experts draw is not “panic,” but “use it for a clear reason, for a limited time, and talk to a clinician if you plan to use it long term.”
Apigenin and chamomile. Chamomile looks well tolerated in short-term trials, with only mild side effects in a few. Long-term safety of high-dose apigenin capsules has not been well studied.
Chamomile belongs to the daisy family, so people with allergies to those plants should be careful. A 2020 review also suggested chamomile might increase the blood-thinning effect of warfarin, so anyone on blood thinners should check with their doctor first.
Extra caution is wise for children, pregnant or breastfeeding people, and anyone taking prescription medicines. There is not enough solid research on either supplement in these groups to make simple promises.
Side by side | Apigenin Vs Melatonin
| Feature | Melatonin | Apigenin |
| What it is | A hormone your body makes | A plant chemical found in chamomile and other plants |
| Human sleep trials | Many, over decades | Almost none for isolated capsules |
| Size of benefit | Small for most adults (a few minutes) | Unknown for capsules; chamomile shows modest signs |
| Best-studied use | Timing problems like jet lag | Chamomile for sleep quality and anxiety |
| Blood sugar | May worsen it in gene-variant carriers (new, small study) | Mouse data only; no human proof |
| Main safety flags | Heart failure link in observational data; mislabeled products | Little long-term data; chamomile and warfarin; daisy-family allergy |
| Overall evidence | Established but modest | Hypothesis (capsules); emerging (chamomile) |
What sleep experts usually suggest first
Before reaching for any supplement, major sleep groups point to CBT-I as the first-choice treatment for long-lasting insomnia.
It teaches skills for thinking about sleep and setting a steady routine, and it has strong evidence behind it. Simple habits also help: a regular wake-up time, morning daylight, less caffeine in the afternoon, a cool dark bedroom, and not eating a large meal right before bed.
If you are curious about the plant route, it is worth knowing that chamomile tea is the form closest to what the trials tested.
That is information, not a prescription. If trouble sleeping lasts more than a few weeks, comes with loud snoring or gasping, or affects your mood or health, see a doctor. Sleep problems can signal other conditions, including sleep apnea, which supplements will not fix.
The bottom line
Melatonin wins on proof: it has been tested in many human trials, and it helps a little, especially for timing problems.
But it is not risk-free, product quality varies, and new research suggests that people with a common diabetes-risk gene may see worse blood sugar control after taking it.
Apigenin is the more exciting story and the less proven one. The idea is plausible, but we have almost no human trials of apigenin capsules, and what we know about chamomile does not automatically carry over.
If you have diabetes, prediabetes, heart problems, or take other medicines, talk to your doctor or pharmacist before you start either one. The best choice is the one that fits your health, backed by honest evidence rather than hype.
Frequently asked questions
Is apigenin better than melatonin for sleep?
There is no human evidence that says so. Melatonin has more human trials, though its benefit is small. Apigenin capsules have not been tested well enough to compare.
Can you take apigenin and melatonin together?
We did not find any trial that tested the combination. Because both are being studied for how they affect the brain and body, it is a question for your doctor or pharmacist, especially if you take other medicines.
Does melatonin raise blood sugar?
It may in some people, especially those with a common MTNR1B gene variant, based on small lab studies in healthy adults. Researchers are still working out what this means for everyday use. If you have diabetes or prediabetes, ask your care team.
Is “natural” the same as “safe”?
No. Natural products can still cause side effects, interact with medicines, or vary in strength from bottle to bottle.
This article is for education only. It is not medical advice, and it does not diagnose or treat any condition. Talk to a qualified health professional about your own sleep and supplement choices.
References
1. Viola H, Wasowski C, Levi de Stein M, et al. Apigenin, a component of Matricaria recutita flowers, is a central benzodiazepine receptors-ligand with anxiolytic effects. Planta Medica. 1995;61(3):213-216. [Link]
2. Zanoli P, Avallone R, Baraldi M. Behavioral characterisation of the flavonoids apigenin and chrysin. Fitoterapia. 2000;71(S1):S117-S123. [link]
3. Hieu TH, Dibas M, Surya Dila KA, et al. Therapeutic efficacy and safety of chamomile for state anxiety, generalized anxiety disorder, insomnia, and sleep quality: a systematic review and meta-analysis. Phytotherapy Research. 2019;33(6):1604-1615. [Link]
4. Kazemi A, Shojaei-Zarghani S, Eskandarzadeh P, Hashempur MH. Effects of chamomile (Matricaria chamomilla L.) on sleep: a systematic review and meta-analysis of clinical trials. Complementary Therapies in Medicine. 2024. [Link]
5. Sleep Medicine Reviews. Efficacy of melatonin for chronic insomnia: systematic reviews and meta-analyses. 2022;66:101692. [link]
6. American Family Physician. Melatonin to treat insomnia in older adults (Clinical Inquiries). 2021. [link]
7. Meta-analysis: melatonin for the treatment of primary sleep disorders (19 studies, 1,683 participants). Psychiatry Online. [link]
8. Dose-response meta-analysis of exogenous melatonin on sleep onset latency and total sleep time (26 randomized trials, 1987-2020). University of Surrey Open Research. [Link]
9. Cohen PA, Avula B, Wang YH, Katragunta K, Khan I. Quantity of melatonin and CBD in melatonin gummies sold in the US. JAMA. 2023;329(16):1401-1402. [Link]
10. Garaulet M, et al. Interplay of dinner timing and MTNR1B type 2 diabetes risk variant on glucose tolerance and insulin secretion: a randomized crossover trial (ONTIME-MT). Diabetes Care. 2022;45. [Link]
11. Qian J, Saxena R, Scheer FAJL, et al. Melatonin impairs glucose tolerance, first-phase insulin secretion, and insulin feedback inhibition; interaction with MTNR1B diabetes risk variant. Diabetes Care. 2026. doi:10.2337/dc26-0164. Summary: Mass General Brigham, Bench Press. [Link]
12. Nnadi E, et al. Long-term melatonin use and heart failure outcomes in adults with insomnia (conference abstract). American Heart Association Scientific Sessions 2025; not peer-reviewed at time of presentation. Coverage: [Link]
13. Apigenin ameliorates dyslipidemia, hepatic steatosis and insulin resistance in high-fat diet-induced obese mice. Nutrients. 2016;8(5):305. [Link]
14. Javadi B, Sobhani Z. Role of apigenin in targeting metabolic syndrome: a systematic review. Iranian Journal of Basic Medical Sciences. 2024;27(5):524-534. [Link]
15. Evidence summaries on isolated apigenin dosing and human trial gaps (secondary, supplement-industry sources; used only to confirm the absence of apigenin-only sleep trials and the approximate apigenin content of chamomile extract): Outliyr (https://outliyr.com/reports/apigenin); Nootropics Depot (https://nootropicsdepot.com/how-much-apigenin-for-sleep-dosage-guide-daily-recommendations/).
