Apigenin has become one of the more talked-about plant compounds in longevity and sleep circles, largely because it turns up in chamomile tea: something most people already have in their kitchen. The logic seems straightforward: drink chamomile, get apigenin, feel calmer and sleep better. The reality is a bit more complicated, and the gap between a mug of tea and a concentrated supplement is wider than most people expect.
This article breaks down what apigenin is, how much of it you realistically get from brewed chamomile versus a capsule, what the proposed mechanisms are, and who should be cautious before adding either to their routine. No cures are claimed here: apigenin research is genuinely interesting, but much of it is early-stage or conducted in cell and animal models rather than large human trials.
Key Takeaways
- A standard cup of chamomile tea delivers roughly 0.5 to 3 mg of apigenin: highly variable and difficult to standardize.
- Apigenin supplements typically provide 50 to 100 mg per serving, representing a 17 to 200x dose increase over tea.
- Apigenin’s proposed mechanisms (GABA-A modulation, CDK2/CDK6 inhibition, CD38 inhibition) are biologically plausible but not yet supported by large human clinical trials.
- In laboratory assays apigenin inhibits CYP1A2, CYP2C9, and CYP3A4; no clinical interaction study of apigenin is available, but caution is reasonable for anyone on warfarin, certain statins, benzodiazepines, or other CYP-metabolized medications [7][8][9][5].
- Choose the form based on your goal: tea for gentle ritual use, supplements if you want a specific and consistent dose, and consult a physician if you take any prescription medications.
What Is Apigenin?
Apigenin (chemical name 4′,5,7-trihydroxyflavone) is a flavonoid: a class of plant-derived polyphenols found across the food supply. It is particularly concentrated in chamomile flowers, but also present in parsley, celery, oregano, and certain other herbs and vegetables. As flavonoids go, apigenin has drawn unusual scientific interest because it appears to interact with several biologically relevant targets rather than acting through a single pathway.
Three proposed mechanisms have received the most attention. First, apigenin binds to benzodiazepine-binding sites on GABA-A receptors, the same receptor complex that prescription sleep and anxiety medications target, which may explain chamomile’s traditional reputation as a calming herb.[1][2] The binding is well documented, but the functional direction is not the one supplement marketing implies: the 1995 report that identified apigenin as a central benzodiazepine-receptor ligand found anxiolytic activity in mice,[1] while a 2000 study using the same binding assay found apigenin reduced GABA-activated chloride currents and produced no anxiolytic, muscle-relaxant or anticonvulsant effect in rats.[2] Second, it has been studied as an inhibitor of cyclin-dependent kinases CDK2 and CDK6, proteins involved in cell-cycle regulation, prompting interest in oncology research. Third, it modestly inhibits CD38, an enzyme that consumes NAD+: a coenzyme central to cellular energy metabolism. None of these mechanisms has translated into approved therapeutic applications, and human evidence for most of them remains limited.
Apigenin Content in Chamomile Tea: The Real Numbers
German chamomile (Matricaria chamomilla) is the primary commercial source, and it is genuinely one of the richest dietary sources of apigenin available. However, how much ends up in your cup depends on several variables: the grade and freshness of the flowers, water temperature, steep time, and whether you are using loose flowers or a commercial teabag.
Research note: In an enzyme study of flavones and flavonols, apigenin (with chrysin, baicalein, luteolin and others) inhibited CYP2C9-mediated diclofenac hydroxylation with Ki values at or below 2.2 micromolar, competitively at the substrate site. The authors say flavonoids can take part in interactions with CYP2C9 substrate drugs; this is in vitro only [19].
Estimates for a standard 8-ounce (240 mL) cup of brewed chamomile tea typically range from roughly 0.5 mg to 3 mg of apigenin, with many commercial teabag preparations falling toward the lower end of that range. Some high-potency loose-flower preparations or double-steep protocols may push higher, but consistent dosing from tea is difficult to achieve. The apigenin is also bound to glycoside forms (primarily apigenin-7-glucoside) in the plant, and how efficiently the gut converts these to free apigenin varies between individuals based on gut microbiome composition and enzyme activity. A human absorption study measured the gap directly: apigenin taken as the free aglycone was poorly absorbed, with metabolites equal to about 0.5% of intake recovered in urine, while the apigenin-7-O-glucoside in chamomile tea peaked in plasma at two hours and produced urinary metabolites equal to about 34% of intake.[3]
The honest takeaway: a nightly cup of chamomile tea is a pleasant, low-risk ritual with a modest and variable apigenin payload. It is not a reliable way to reach the doses used in most laboratory studies. A review of chamomile tea’s bioactivity makes the same point from the other direction: human studies are limited and clinical trials examining the tea’s purported sedative properties are absent, and people allergic to other plants in the daisy family can react to chamomile.[4]
Chamomile flowers hold mostly apigenin glycosides, with only small amounts of free apigenin. The one human absorption study found that the glucoside in chamomile tea produced urinary metabolites equal to 34% of intake, while free apigenin gave 0.5% of the dose, so a milligram of apigenin in tea and a milligram of free apigenin in a capsule are not the same exposure [18][3].
What Apigenin Supplements Actually Deliver
Standalone apigenin supplements, typically sold as capsules or softgels, are now widely available and generally standardized to provide 50 mg or 100 mg of apigenin per serving, with some formulations going higher. This represents anywhere from roughly 17 to 200 times the apigenin in a typical cup of chamomile tea, depending on where that cup falls in the dose range described above.
Most supplements use apigenin derived from chamomile extract that has been concentrated and purified, though some use parsley or other sources. The form matters: supplements that provide free apigenin (the aglycone form) may have different bioavailability characteristics than those providing glycoside-bound apigenin. Supplement labels do not always specify which form is present, so it is worth checking with the manufacturer if bioavailability is a concern.
It is worth noting that the doses used in cell-culture and animal studies are often far higher than what any supplement provides, and extrapolating those findings to human supplementation requires significant caution. Research specifically examining supplemental doses in healthy humans is limited.
The Dose Gap: Why It Matters for Realistic Expectations
If you are drinking chamomile tea primarily for its taste and its gentle, ritual calming effect, the dose question is largely irrelevant: you are not using it as a targeted supplement and your expectations are calibrated accordingly. Problems arise when people assume that chamomile tea and a 50 mg apigenin capsule are equivalent, or that either one is equivalent to the doses studied in mechanistic research.
For sleep and relaxation purposes, some users report that even modest doses, whether from tea or a low-dose supplement, have a noticeable effect, but expectation is a known confounder in chamomile trials: in an open-label chamomile extract trial for generalized anxiety disorder, patients who expected more benefit at baseline were more likely to respond [10]. For the CDK2/CDK6 and CD38 mechanisms that have attracted longevity researchers, the concentrations required appear to be substantially higher, and whether oral supplementation in humans achieves those tissue concentrations is not established by current evidence.
The practical framing: chamomile tea is a gentle, food-grade exposure; supplements are a deliberate pharmacological step up. Neither is a substitute for the other if you have a specific goal in mind, and neither has proven clinical efficacy for any condition in the way a regulated drug would.
Drug Interactions and Who Should Exercise Caution
In laboratory assays apigenin inhibits three cytochrome P450 enzymes, CYP1A2, CYP2C9, and CYP3A4, that the liver uses to metabolize many drugs. If that happened in people, blood levels of co-administered medications could rise, but no clinical interaction study of apigenin is available. Drugs that would warrant particular caution include warfarin and other anticoagulants (metabolized via CYP2C9), certain statins, and benzodiazepines (CYP3A4 substrates) [7][8][9][5]. The CYP3A4 arm of this has been characterised in vitro: apigenin and three related flavonoid aglycones found in parsley, honey, celery and chamomile tea all inhibited CYP3A4 activity, though the authors note that whether that produces a clinically meaningful food-drug interaction still has to be assessed in people.[5]
Anyone taking prescription medications in these categories, or any drug with a narrow therapeutic index, should consult their physician or pharmacist before using apigenin supplements. This concern is less acute for occasional chamomile tea at normal culinary doses, but it becomes relevant at supplement doses, especially if consumed daily. A randomised crossover trial in healthy volunteers is consistent with that: a single dose of chamomile tea prolonged prothrombin time by an average of 0.7 seconds, and neither the tea nor a 500 mg chamomile extract capsule reached the study’s predefined 10% threshold for clinical significance.[6]
Caution is also warranted when combining apigenin supplements with other sedative compounds, including melatonin, valerian, kava, or alcohol. Because apigenin has GABAergic activity, additive central nervous system depression is plausible, even if it has not been formally quantified in human studies. Pregnant and breastfeeding individuals should avoid apigenin supplements due to insufficient safety data, though chamomile tea at moderate culinary intake is generally considered a different risk category.
Chamomile Tea, Supplements, or Both: A Practical Framework
For most healthy adults without drug interaction concerns, chamomile tea is a reasonable nightly ritual with a long history of traditional use and a favorable safety profile at ordinary consumption levels. If your goal is simply winding down before bed, the ritual itself (warm liquid, low lighting, no screens) may contribute as much to sleep onset as the apigenin content.
For individuals specifically interested in the CD38 mechanism that has driven interest among longevity researchers, apigenin inhibited purified human CD38 in the test tube at an IC50 of 10.3 micromol/L, and pure apigenin was poorly absorbed in healthy men (urinary metabolites equal to 0.5% of the dose). Whether a 50 mg supplement reaches tissue concentrations that matter, or translates to human benefit, has not been shown [11][3].
No study has tested a nightly chamomile tea habit combined with an apigenin supplement, so the safety of combining both is untested; if you do combine them, review the drug interaction considerations above first. Stacking is common in supplement culture but does not automatically mean more benefit; it does mean more total apigenin exposure, which compounds both potential effects and potential interactions.
🛒 Where to Buy Apigenin
- Momentous Apigenin
capsules, 50 mg per capsule, 60 count: NSF Certified for Sport, meaning batch testing against a banned-substance list and verification that the label matches the contents - Vitamatic Apigenin 50mg
capsules, 50 mg per capsule, 120 vegetarian capsules: The lowest cost per dose on this list, and a vegetarian capsule if gelatin is a constraint; the listing states no third-party certification - Nutricost Apigenin 50mg
capsules, 50 mg per capsule, 180 count: Non-GMO, gluten free and vegan, and the best cost per capsule among the larger bottles here - Swanson Apigenin 50mg
capsules, 50 mg per capsule, 90 count: A long-established supplement brand, in the smaller 90-count bottle; the listing frames it around sleep and relaxation
As an Amazon Associate we earn from qualifying purchases. Apigenin products differ mainly in what else is in the capsule (some are plain apigenin, others blend it with L-theanine, valerian root or magnesium) so check the label for the actual apigenin dose per serving, and prefer products that publish third-party testing.
A Note on the Evidence
These statements have not been evaluated by the FDA; apigenin supplements are not intended to diagnose, treat, cure, or prevent any disease. Most apigenin research has been conducted in cell cultures or animal models, human clinical evidence is limited, and individuals on warfarin, benzodiazepines, certain statins, or any CYP1A2, CYP2C9, or CYP3A4-metabolized medication should consult a physician before use.
Frequently Asked Questions
How much apigenin is in a cup of chamomile tea?
Estimates vary widely based on flower quality, steep time, and water volume, but most commercial teabag preparations provide roughly 0.5 to 1.5 mg of apigenin per 8-ounce cup. Higher-quality loose chamomile flowers steeped longer can push toward 2 to 3 mg. Consistent dosing from tea is inherently difficult.
Is 50 mg of apigenin from a supplement safe?
50 mg is a commonly sold supplement dose, but published safety data for isolated apigenin in people are limited. The one human trial that included 50 mg of apigenin gave it inside a blend with magnesium L-threonate and L-theanine for two weeks to healthy adults, and its sample was 103 people. This is not medical advice, and anyone with health conditions or on prescription medications should consult a physician [12]. This is not medical advice, and anyone with health conditions or on prescription medications should consult a physician.
Can apigenin supplements interact with warfarin?
No clinical study of apigenin and warfarin is available, but caution is reasonable. In laboratory assays apigenin inhibited CYP2C9, an enzyme involved in metabolizing warfarin. For chamomile itself, one case report describes an older woman on warfarin and amiodarone who had multiple internal haemorrhages after using chamomile tea and a chamomile lotion, so causation is not proven [8][13]. Anyone on warfarin or other anticoagulants should not add apigenin supplements without discussing it with their prescribing physician.
Does chamomile tea contain enough apigenin to affect sleep?
This has not been shown. The chamomile insomnia pilot used extract equal to 15 g of chamomile flowers a day, an amount that could not feasibly be delivered as tea, and found no significant effect on sleep diary measures. In 55 cancer patients, chamomile tea once a day for two weeks had no effect on anxiety. Whether apigenin in tea contributes at all is hard to separate from the ritual of drinking warm tea [14][15][16].
What is CD38 inhibition and why do longevity researchers care about apigenin?
CD38 is an enzyme that consumes NAD+, a coenzyme essential for cellular energy metabolism and implicated in aging biology. Apigenin modestly inhibits CD38, which theoretically could support NAD+ levels. This has drawn interest in longevity research communities, but human evidence linking apigenin supplementation to meaningful NAD+ increases or longevity outcomes is not yet established.
Can I take apigenin with melatonin?
Both compounds are used for sleep, and combining them could in theory produce additive drowsiness, but how apigenin might act is unsettled: it binds a benzodiazepine site in rat brain tissue yet inhibited GABA activation in cell studies [1][17]. This combination is used by some people without reported serious problems, but it has not been formally studied for safety or optimal dosing. Use caution, start with lower doses of each, avoid driving or operating machinery after taking both, and do not add alcohol.
References
- Viola H, Wasowski C, Levi de Stein M, Wolfman C, et al. Apigenin, a component of Matricaria recutita flowers, is a central benzodiazepine receptors-ligand with anxiolytic effects. Planta Medica (1995). PMID 7617761
- Avallone R, Zanoli P, Puia G, Kleinschnitz M, et al. Pharmacological profile of apigenin, a flavonoid isolated from Matricaria chamomilla. Biochemical Pharmacology (2000). PMID 10751547
- Borges G, Fong RY, Ensunsa JL, Kimball J, et al. Absorption, distribution, metabolism and excretion of apigenin and its glycosides in healthy male adults. Free Radical Biology & Medicine (2022). PMID 35452808
- McKay DL, Blumberg JB. A review of the bioactivity and potential health benefits of chamomile tea (Matricaria recutita L.). Phytotherapy Research (2007). PMID 16628544
- Kondža M, Bojić M, Tomić I, Maleš Ž, et al. Characterization of the CYP3A4 Enzyme Inhibition Potential of Selected Flavonoids. Molecules (2021). PMID 34069400
- Kimura R, Schwartz JA, Romeiser JL, Senzel L, et al. The Acute Effect of Chamomile Intake on Blood Coagulation Tests in Healthy Volunteers: A Randomized Trial. The Journal of Applied Laboratory Medicine (2024). PMID 38300838
- Fei Lin et al. Inhibitory effect of Selaginella doederleinii hieron on human cytochrome P450. Frontiers in Pharmacology (2023). PMID 36874034
- Wang Z et al. Inhibitory Effect of Apigenin on Losartan Metabolism and CYP2C9 Activity in vitro. Pharmacology (2016). PMID 27287328
- Shimada H et al. Differential mechanisms for the inhibition of human cytochrome P450 1A2 by apigenin and genistein. Journal of biochemical and molecular toxicology (2010). PMID 20806393
- Keefe JR et al. Specific expectancies are associated with symptomatic outcomes and side effect burden in a trial of chamomile extract for generalized anxiety disorder. Journal of psychiatric research (2017). PMID 27716513
- Carlos Escande et al. Flavonoid Apigenin Is an Inhibitor of the NAD+ase CD38. Diabetes (2012). PMID 23172919
- Mastrofini GF et al. Modulating stress and sleep through a multi-compound dietary supplement: a randomized, double-blind, placebo-controlled trial. Journal of the International Society of Sports Nutrition (2026). PMID 42829807
- R. Segal Warfarin interaction with Matricaria chamomilla. Canadian Medical Association Journal (2006). PMID 16636327
- Zick SM et al. Preliminary examination of the efficacy and safety of a standardized chamomile extract for chronic primary insomnia: a randomized placebo-controlled pilot study. BMC complementary and alternative medicine (2011). PMID 21939549
- Atena Pasban et al. The Effect of Chamomile on Common Psychological Disorders Including Depression, Anxiety, Stress and Sleep Disorders: A Narrative Review. Iranian Journal of Psychiatry and Behavioral Sciences (2025). doi:10.5812/ijpbs-157547
- Sogand Saadatmand et al. The Effect of Oral Chamomile on Anxiety: A Systematic Review of Clinical Trials. Clinical Nutrition Research (2024). PMID 38784853
- Campbell EL et al. The dietary flavonoids apigenin and (-)-epigallocatechin gallate enhance the positive modulation by diazepam of the activation by GABA of recombinant GABA(A) receptors. Biochemical pharmacology (2004). PMID 15451406
- Corina Danciu et al. Botanical Therapeutics: Phytochemical Screening and Biological Assessment of Chamomile, Parsley and Celery Extracts against A375 Human Melanoma and Dendritic Cells. International Journal of Molecular Sciences (2018). PMID 30453564
- Si D et al. Mechanism of CYP2C9 inhibition by flavones and flavonols. Drug metabolism and disposition: the biological fate of chemicals (2009). PMID 19074529
These statements have not been evaluated by the Food and Drug Administration. This information is not intended to diagnose, treat, cure, or prevent any disease. Content is for informational purposes only and is not medical advice; consult a qualified healthcare provider before starting any supplement. As an Amazon Associate we earn from qualifying purchases.
