Apigenin

01 What is Apigenin?

Apigenin is a flavonoid found abundantly in chamomile, parsley, celery, and various herbs. It has been used medicinally for thousands of years (chamomile tea for sleep, anyone?) but modern research is revealing it to be far more interesting than a simple sleep aid. Andrew Huberman brought it mainstream attention by discussing its ability to promote sleep via GABA modulation, but the longevity community is equally excited about its effects on CD38 inhibition and NAD+ preservation. Here is why apigenin is gaining traction in biohacking circles: CD38 is an enzyme that consumes NAD+ — and CD38 activity increases dramatically with age. It is one of the main reasons NAD+ declines as you get older. Apigenin inhibits CD38, which means it helps preserve your existing NAD+ levels. Combine it with an NAD+ precursor like NMN, and you are both producing more NAD+ and preventing its destruction. The anti-cancer research is also compelling. Apigenin has shown activity against multiple cancer types in preclinical research — breast, prostate, colon, and pancreatic — through multiple mechanisms. It is not a cancer cure, but the breadth of its anti-tumour activity is noteworthy for a simple plant flavonoid.

02 How Does It Work?

Sleep: Apigenin binds to GABA-A receptors as a positive allosteric modulator (like a gentle benzodiazepine). It enhances GABA signalling without the sedation, tolerance, or dependence of pharmaceutical GABA drugs. The effect is anxiolytic and sleep-promoting rather than sedating. Longevity: Apigenin potently inhibits CD38, the NAD+-consuming enzyme that increases with age. By blocking CD38, apigenin preserves intracellular NAD+ levels — supporting sirtuin activity and DNA repair without requiring exogenous NAD+ supplementation. Anti-cancer: inhibits aromatase, suppresses NF-kB, induces apoptosis in cancer cells, and inhibits angiogenesis.

03 What Does The Research Say?

Sleep: Clinical studies confirm chamomile extract (standardised for apigenin) improves sleep quality in elderly and postpartum populations. GABAergic mechanism confirmed in receptor binding studies. CD38 inhibition: In vitro and animal studies show potent CD38 inhibition and NAD+ preservation. Human clinical data specifically for CD38 inhibition is still emerging but mechanistic evidence is strong. Anti-cancer: Extensive preclinical data across multiple cancer types. No completed cancer clinical trials with apigenin alone, but the breadth of preclinical activity is impressive. Epidemiological data suggests higher flavonoid intake correlates with reduced cancer risk.

04 Reported Dosages

Sleep: 50mg apigenin before bed (Huberman protocol). Some studies use chamomile extract standardised to 3-10% apigenin. NAD+ preservation: 250-500mg daily (higher doses for CD38 inhibition). Available as pure apigenin capsules or chamomile extract. Taken in evening for sleep benefits, any time for metabolic benefits. Legal supplement worldwide.

05 Side Effects & Risks

Very well-tolerated. One concern: apigenin has mild aromatase-inhibiting effects, which could theoretically reduce oestrogen in women or men at very high doses. At standard supplemental doses (50-500mg), this is unlikely to be clinically significant. Mild sedation at higher doses (which is the point for sleep use).

06 Legal Status

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