What Is Apigenin?

Reviewed by SOMA HEALTH's Medical Research Team

Apigenin is the flavonoid most people have already consumed without knowing it – the compound in a warm cup of chamomile tea. In recent years it has jumped from the teapot to the supplement shelf, promoted for winding down at night and, more speculatively, for healthy aging. Here is a measured explanation of what apigenin is, how it is thought to work on both the sleep and the cellular-aging fronts, what human evidence supports, and where it clearly outruns the data.

What apigenin is

Apigenin is a flavone, a subclass of the flavonoids – the large group of plant pigments and defense compounds that give many fruits, vegetables, and herbs their color and bioactivity. It is found in chamomile flowers, parsley, celery, and a range of other plants, but chamomile is the source most associated with its calming reputation. Chemically it is a small, relatively stable molecule; in plants it often exists bound to sugars (as glycosides) and is released to its active ‘aglycone’ form during digestion.

On its own, apigenin has modest water solubility, which affects how much is absorbed and is one reason isolated-apigenin supplements and chamomile extracts can behave somewhat differently. That distinction matters when you read the research: much of the human data actually studies standardized chamomile extract rather than purified apigenin.

The sleep angle: GABA and the calm-before-bed reputation

The most popular reason people take apigenin is for sleep and relaxation. The proposed mechanism, characterized mainly in cell and animal models, is that apigenin interacts with GABA-A receptors – the same broad receptor system that governs the brain’s primary ‘calming’ signaling. By modulating this system, apigenin is thought to produce a mild anxiolytic, sedative-leaning effect. This is a preclinical mechanism; it is a plausible explanation for chamomile’s traditional use, not a demonstrated drug-like action in humans.

On the human side, the better evidence comes from chamomile preparations rather than isolated apigenin. Randomized trials of standardized chamomile extract have explored sleep quality and symptoms of anxiety, with generally modest, mixed but sometimes favorable results. It is honest to say that chamomile has a reasonable, if not overwhelming, human track record for supporting relaxation, and that the leap from ‘chamomile extract helped’ to ‘this many milligrams of pure apigenin will do the same’ is an extrapolation the data does not fully cover. Apigenin is a sleep-support ingredient, not a treatment for insomnia or any anxiety disorder – if sleep problems are persistent, that is a conversation for your doctor.

The healthy-aging angle: apigenin, CD38, and NAD

The second reason apigenin appears in longevity stacks – often next to NMN or NR – is its relationship with an enzyme called CD38. CD38 is one of the body’s major consumers of NAD, the coenzyme central to energy metabolism, and CD38 activity tends to rise with age. In preclinical (cell and mouse) research, apigenin can inhibit CD38, which in theory could help slow the depletion of NAD. That is the logic behind pairing apigenin with NAD-precursor supplements: one supplies the raw material, the other is proposed to reduce how fast it is burned.

This is genuinely interesting biology, and it is genuinely early. The CD38–NAD story for apigenin rests largely on laboratory and rodent work, and it has not been established in robust human trials that apigenin meaningfully raises or preserves NAD levels in people. A 2024 review in Frontiers in Nutrition framed apigenin as a molecule sitting ‘at the intersection of sleep and aging’ – an accurate description of an intriguing candidate whose human aging evidence is still forming, not finished.

How apigenin compares to urolithin A

Apigenin and urolithin A are frequently mentioned in the same ‘healthy aging’ breath, but they are not doing the same thing. Apigenin is a flavone studied for GABA-related calming and, preclinically, for sparing NAD by inhibiting CD38. Urolithin A works through mitophagy – the cellular housekeeping process that recycles worn-out mitochondria so healthier ones can take over. It is a gut postbiotic your microbiome makes from ellagitannins in pomegranate, walnuts, and berries, though only some people convert it efficiently, which is why it is commonly supplemented.

The evidence maturity also differs. Urolithin A carries a comparatively developed human record. In humans, Andreux and colleagues (2019, Nature Metabolism) reported the first-in-human trial and found it safe and well tolerated up to 1,000 mg per day, with a mitochondrial gene-expression signature. Randomized human trials by Liu and D’Amico (2022, JAMA Network Open) in older adults and Singh and colleagues (2022, Cell Reports Medicine) in middle-aged adults, using 500 mg and 1,000 mg arms, examined muscle endurance, strength, and exercise performance; a 2025 Nature Aging randomized trial reported support for immune-cell mitochondrial health in midlife adults. The original mitophagy and lifespan findings (Ryu and colleagues, 2016, Nature Medicine) are preclinical, from C. elegans and rodents. For the full breakdown, see our complete urolithin A guide, our roundup of the best urolithin A gummies, and our review of the urolithin A clinical studies. If steadier daytime energy is your aim, our page on urolithin A for energy is a useful companion.

Practical notes if you are considering apigenin

Apigenin supplements are usually sold in the tens-of-milligrams range, and chamomile extracts are standardized differently – check the current label for what a given product actually delivers. Most people tolerate chamomile-derived preparations well, but apigenin can interact with the way some medications are metabolized, and chamomile is in the ragweed family, so people with those allergies should be cautious. If you are pregnant, nursing, on prescription medication (especially sedatives or blood thinners), or dealing with an ongoing sleep or mood concern, talk with a qualified healthcare provider first. Apigenin is a wind-down and general-wellness ingredient, not a therapy for any medical condition.

As with any single ingredient, the sensible approach is to be clear about which job you are hiring it for – relaxation at night is well within its traditional lane; large aging claims are not – and to choose a third-party-tested product.

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. This guide is educational and is not a substitute for advice from a qualified healthcare provider.