Andrew Huberman, the Stanford neuroscientist and host of the Huberman Lab podcast, has publicly discussed a personal sleep supplement stack that includes apigenin, magnesium threonate, and L-theanine. His mentions of these compounds brought significant public attention to apigenin, a plant-derived flavonoid that had been studied in research settings for years but was largely unknown outside of specialty health circles.
This article explains what apigenin is, the proposed biological mechanism behind its potential sleep-supporting effects, how it fits into Huberman’s broader discussion of sleep optimization, and the honest caveats anyone should understand before adding it to their routine. No claims here constitute medical advice, and these statements have not been evaluated by the FDA. Apigenin is not intended to diagnose, treat, cure, or prevent any disease.
Key Takeaways
- Apigenin binds the benzodiazepine site of the GABA-A receptor, but what it does after binding is not what the marketing says: in patch-clamp recordings it reduced GABA-evoked currents rather than enhancing them.
- Andrew Huberman’s published sleep stack is 50 mg apigenin, 145 mg magnesium threonate (or 200 mg magnesium bisglycinate) and 100 to 400 mg L-theanine, 30 to 60 minutes before bed; this reflects his personal use and publicly shared opinion, not a clinical protocol.
- Apigenin inhibits CYP1A2, CYP2C9, and CYP3A4, meaning it can interact with warfarin, certain statins, benzodiazepines, and other drugs; consult a physician if you take any of these medications.
- Research on apigenin’s other proposed properties — CDK2/CDK6 inhibition and CD38 inhibition for NAD+ support — is largely from cell and animal studies and should not be interpreted as human clinical evidence.
- These statements have not been evaluated by the FDA; apigenin is not intended to diagnose, treat, cure, or prevent any disease.
What Is Apigenin?
Apigenin is a naturally occurring plant flavonoid with the chemical name 4′,5,7-trihydroxyflavone. It is found in meaningful concentrations in chamomile flowers, parsley, celery, and certain other herbs and vegetables. Chamomile tea, one of the most widely consumed herbal teas in the world, owes much of its traditional reputation for promoting calm and sleep to the apigenin it contains, though the dose in a typical cup of tea is lower than what is used in concentrated supplement form.
As a flavonoid, apigenin belongs to a large family of polyphenolic compounds produced by plants, many of which have been studied for various biological activities. It is fat-soluble, meaning absorption may be improved when taken with a small amount of dietary fat. Supplement manufacturers typically offer apigenin in doses ranging from 25 mg to 50 mg per capsule, often standardized from chamomile extract.
The Proposed Mechanism: GABA-A Receptor Binding
The most discussed mechanism by which apigenin may support sleep and anxiolysis involves its interaction with GABA-A receptors in the brain. Specifically, apigenin binds the central benzodiazepine site, competitively displacing flunitrazepam with a Ki near 4 micromolar, while having no effect on binding at the GABA site itself[1]. GABA (gamma-aminobutyric acid) is the brain’s primary inhibitory neurotransmitter, and the GABA-A receptor complex is the same target at which benzodiazepine drugs like diazepam act to produce sedation and anxiolysis.
Binding is not the same as activation, and this is where the popular account and the published electrophysiology part company. The phrase positive allosteric modulator, borrowed from benzodiazepine pharmacology, is not what the channel recordings show: in recombinant alpha1beta2gamma2 receptors and in cultured cortical neurons, apigenin reduced GABA-evoked currents and decreased both the amplitude and the frequency of spontaneous inhibitory currents, an antagonist profile rather than a potentiating one[2]. In rats, its sedative effect was not reversed by the benzodiazepine antagonist flumazenil, and apigenin produced no anxiolytic effect at all in that model[3]. The authors of the patch-clamp study concluded that inhibition at the GABA receptor cannot explain what the compound does in a living animal, and proposed a general reduction in network excitability via NMDA-receptor antagonism as the more plausible route to sedation[2]. Apigenin is therefore not equivalent to pharmaceutical benzodiazepines in strength, in effect, or even in direction, and the clinical magnitude of any sleep benefit in healthy adults at standard supplement doses is not established.
This same mechanism is also why apigenin carries a meaningful drug-interaction caution: combining it with other GABA-acting compounds — including benzodiazepines, alcohol, or sleep aids that also affect GABA — could produce additive or unpredictable sedative effects. This concern extends to stacking apigenin with melatonin, which operates via a different receptor system but still adds to overall sedative load.
Huberman's Sleep Stack: How Apigenin Fits In
Huberman’s published sleep toolkit lists 50 mg of apigenin alongside 145 mg of magnesium threonate, or 200 mg of magnesium bisglycinate as an alternative, and 100 to 400 mg of L-theanine, taken 30 to 60 minutes before sleep. The magnesium detail is worth getting right, because it is widely misreported: threonate is the form he specifies, and 145 mg refers to elemental magnesium rather than the weight of the salt, so a label showing a few hundred milligrams of magnesium L-threonate is not the same quantity. He frames each compound as targeting a different part of the sleep-onset process: magnesium for muscular relaxation and general nervous system support, L-theanine for reducing mental rumination without causing drowsiness, and apigenin for anxiolysis. He also stresses that the stack is optional, that some people need none of it, and that compounds should be added one at a time.
It is worth being clear about what Huberman’s recommendations represent: they are his personal self-experimentation and publicly shared opinions, not clinical prescriptions. He has repeatedly stated on the podcast that individuals vary considerably in their responses to these compounds and that not everyone benefits from the same stack or the same doses. The scientific discussion he provides is largely mechanism-focused, not drawn from large randomized controlled trials on exactly this combination.
For people considering this stack, the honest starting point is to try compounds individually before combining them, to begin with the lower end of any suggested dose range, and to consult a healthcare provider if any existing medications or health conditions are relevant.
Other Researched Properties of Apigenin
Beyond the sleep-related GABA-A research, apigenin has been studied in other contexts. In cancer biology research, it has been investigated as a potential inhibitor of cyclin-dependent kinases CDK2 and CDK6, proteins involved in cell-cycle progression. Inhibiting these kinases is one pathway through which apigenin is thought to promote apoptosis in cancer cell lines studied in laboratory settings. This is laboratory research, primarily in cell cultures and animal models, and does not translate to a clinical claim about cancer prevention or treatment in humans.
Apigenin has also received attention in the context of NAD+ biology. It is described as a modest inhibitor of CD38, an enzyme that consumes NAD+ as part of its normal function; in the study that characterised this, apigenin raised NAD+ in cultured cells and, in obese mice, lowered global protein acetylation and improved several measures of glucose and lipid handling[4]. Because NAD+ is important for mitochondrial energy metabolism and declines with age, compounds that inhibit CD38 have drawn interest as potential supports for NAD+ availability. Again, this is an active and early research area; translating cell-level and animal findings to meaningful human outcomes requires clinical trials that have not yet been conducted at scale for apigenin specifically.
Drug Interactions and Safety Considerations
In laboratory assays, apigenin inhibits several cytochrome P450 liver enzymes, specifically CYP1A2[5], CYP2C9[6] and CYP3A4[7]. The CYP2C9 result is the most concrete: apigenin inhibited the metabolism of the blood-pressure drug losartan in human liver microsomes with a half-maximal inhibitory concentration near 4 micromolar, and behaved as a competitive inhibitor of the enzyme[6]. These are test-tube findings. Whether a 50 mg oral dose reaches inhibitory concentrations at the liver in a living person has not been tested, so this is a reason to ask a pharmacist rather than a documented human interaction. These enzymes are responsible for metabolizing a wide range of drugs and compounds. Inhibiting them can increase blood levels of medications that depend on these pathways for clearance, potentially leading to elevated drug concentrations and associated side effects or toxicity.
Practically, this matters most for people taking warfarin (a blood thinner metabolized partly via CYP2C9), certain statins (some of which use CYP3A4), and benzodiazepines or other sedatives. If you are on any of these medications, apigenin supplementation should be discussed with a physician before starting. The interaction risk is not a theoretical edge case; it is a pharmacologically grounded concern that deserves direct attention.
Beyond drug interactions, the sedative potential of apigenin means it should not be combined casually with alcohol or other sedating substances. Pregnant or breastfeeding individuals, those with hormone-sensitive conditions (flavonoids can have mild estrogenic activity), and anyone with liver impairment should also exercise caution and seek medical guidance.
Practical Considerations: Dosing, Timing, and Sources
The dose Huberman has discussed publicly is 50 mg of apigenin, taken 30 to 60 minutes before sleep. Supplements on the market are commonly standardized from chamomile extract and available in 25 mg or 50 mg capsules. Consuming chamomile tea as a natural source does deliver apigenin, but the concentration per cup is substantially lower than a concentrated supplement dose, making it difficult to replicate supplement-level intake through tea alone. Dose is not the whole story, though. In the only human study to measure it, free apigenin of the kind sold in capsules was the worst absorbed form tested, with metabolites equal to 0.5% of intake recovered in urine over 24 hours, against 34% from chamomile tea[8]. A supplement’s real advantage is the size of the dose, not the efficiency of its absorption.
Because apigenin is fat-soluble, taking it with a meal or a small amount of fat may improve absorption, though this has not been rigorously studied in humans at supplemental doses. Quality and standardization vary across supplement brands; choosing products from manufacturers that provide third-party testing for purity and potency is advisable.
Some users report that apigenin taken alone produces mild but noticeable relaxation without the grogginess associated with stronger sedatives. Others notice minimal effect. Individual response variability is real, and starting at 25 mg before trying 50 mg is a reasonable approach for those sensitive to sleep-related supplements.
🛒 Where to Buy Apigenin
- Momentous ApigeninLab-tested / studied
capsules, 50 mg per capsule, 60 count — The only NSF Certified for Sport option here, 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
The human evidence base for apigenin as a sleep supplement at standard doses remains limited; most mechanistic findings come from cell-culture and animal research, and individual responses vary. It is worth being specific about what has actually been tested. The one randomised, double-blind, placebo-controlled trial in chronic primary insomnia gave 34 adults a standardised chamomile extract, 270 mg twice daily for 28 days, and found no significant difference from placebo on any sleep diary measure, including total sleep time, sleep latency, sleep efficiency and night-time awakenings[9]. No trial has tested isolated apigenin at 50 mg for sleep at all. Anyone on medications metabolized by CYP1A2, CYP2C9, or CYP3A4 — including warfarin and certain statins — should consult a physician before use, as apigenin inhibits these enzymes and can raise drug blood levels unpredictably.
Frequently Asked Questions
Why does Andrew Huberman recommend apigenin for sleep?
Huberman has cited apigenin’s proposed mechanism of action at benzodiazepine-binding sites on GABA-A receptors as the rationale for including it in his sleep stack. He views it as a mild anxiolytic that can ease the transition into sleep without the next-day grogginess associated with stronger sedatives. His recommendations are personal and based on his reading of the mechanistic research, not clinical trial outcomes.
Is apigenin safe to take every night?
No large long-term safety trials in humans have been conducted on nightly apigenin supplementation at 50 mg doses, so definitive answers about long-term daily use are not available. Short-term use at standard doses appears to be well-tolerated for most healthy adults based on available information, but individuals on medications metabolized by CYP1A2, CYP2C9, or CYP3A4 face real interaction risks and should consult a physician before regular use.
Can I get enough apigenin from chamomile tea?
Chamomile tea does contain apigenin, but the concentration in a typical brewed cup is considerably lower than a 50 mg supplement dose. To approach supplemental levels through tea, you would need to consume multiple concentrated cups, which is impractical for most people. Absorption runs the other way, though: in the only human study to measure it, 34% of the apigenin in chamomile tea was recovered as metabolites in urine, against 0.5% for the free apigenin used in capsules. Capsules give you a larger and better-measured dose, not a better-absorbed one.
Does apigenin affect NAD+ levels?
Apigenin is described in research literature as a modest inhibitor of CD38, an enzyme that consumes NAD+ during its normal enzymatic activity. In theory, inhibiting CD38 could support NAD+ availability, particularly as CD38 expression increases with age and inflammatory conditions. However, demonstrating a meaningful increase in human NAD+ levels from apigenin supplementation at typical doses has not been confirmed in large, well-controlled clinical trials.
Can I stack apigenin with melatonin?
Combining apigenin with melatonin is a common practice, but it adds two sedative-adjacent compounds together. Melatonin works through melatonin receptors and apigenin through GABA-A modulation, so the mechanisms are different, but both tilt toward reduced arousal. Huberman has noted that he personally does not always include melatonin in his stack and has expressed some caution about high-dose melatonin use. If you combine them, start with low doses of each and monitor how you feel, particularly in terms of morning alertness.
Who should avoid apigenin or consult a doctor first?
Anyone taking warfarin, certain statins, benzodiazepines, or other medications relying on CYP1A2, CYP2C9, or CYP3A4 for metabolism should speak with a physician before starting apigenin. Pregnant or breastfeeding individuals, people with hormone-sensitive conditions, those with liver disease, and anyone already using multiple sedating substances including alcohol should also seek medical guidance before use.
References
- Viola H et al. Apigenin, a component of Matricaria recutita flowers, is a central benzodiazepine receptors-ligand with anxiolytic effects. Planta Med (1995). PMID 7617761
- Losi G et al. Apigenin modulates GABAergic and glutamatergic transmission in cultured cortical neurons. Eur J Pharmacol (2004). PMID 15464088
- Zanoli P et al. Behavioral characterisation of the flavonoids apigenin and chrysin. Fitoterapia (2000). PMID 10930722
- Escande C et al. Flavonoid apigenin is an inhibitor of the NAD+ ase CD38: implications for cellular NAD+ metabolism, protein acetylation, and treatment of metabolic syndrome. Diabetes (2013). PMID 23172919
- Shimada H et al. Differential mechanisms for the inhibition of human cytochrome P450 1A2 by apigenin and genistein. J Biochem Mol Toxicol (2010). PMID 20806393
- Wang Z et al. Inhibitory effect of apigenin on losartan metabolism and CYP2C9 activity in vitro. Pharmacology (2016). PMID 27287328
- Kondza M et al. Characterization of the CYP3A4 enzyme inhibition potential of selected flavonoids. Molecules (2021). PMID 34069400
- Borges G et al. Absorption, distribution, metabolism and excretion of apigenin and its glycosides in healthy male adults. Free Radic Biol Med (2022). PMID 35452808
- 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 Complement Altern Med (2011). PMID 21939549
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.
