Apigenin: Anti-Aging, Sleep & Cellular Health — Evidence Review
⚡ 60-Second Summary
Apigenin is a flavone found in chamomile, parsley, celery, and many herbs. It has attracted research interest for its ability to inhibit CD38 (a key enzyme that degrades NAD+), support sleep via GABA-A receptor modulation, and exhibit anti-inflammatory and anti-cancer properties in cell culture studies.
Best-evidenced uses: Sleep quality (via GABA-A modulation — the same mechanism as chamomile tea); CD38 inhibition to support NAD+ levels (in vitro and animal studies; human RCTs lacking); anti-inflammatory effects (in vitro). Most exciting research is in longevity science but human clinical data is very limited.
Practical note: Chamomile tea provides ~3–6 mg of apigenin per cup — a small but consistent dose. Supplement doses (25–100 mg/day) are much higher and lack robust human RCT validation. Apigenin is considered a senolytic and NAD+ precursor enhancer in longevity circles, but clinical evidence is emerging, not established.
What is Apigenin?
Apigenin (4',5,7-trihydroxyflavone) is a flavone aglycone present as a glycoside (apigenin-7-glucoside) in chamomile flowers and as free apigenin in parsley and celery. It acts as a competitive inhibitor of CD38, a cyclic ADP-ribose hydrolase that consumes NAD+ as a substrate. By inhibiting CD38, apigenin may preserve NAD+ levels — the same goal pursued by NMN and NR supplementation, but through a different mechanism.
Apigenin also modulates GABA-A receptors (like benzodiazepines, but with much lower affinity), which may explain chamomile's mild anxiolytic and sleep-promoting effects. In cell culture studies, apigenin exhibits anti-proliferative activity against cancer cell lines, anti-inflammatory effects (NF-kB inhibition), and antioxidant properties. Human clinical validation of these effects at supplement doses is largely absent.
Evidence-based benefits
1. Sleep quality support (GABA-A modulation)
Chamomile's apigenin content contributes to its well-known mild sedative effects through partial GABA-A receptor agonism. A clinical trial in postpartum women showed chamomile (apigenin-containing) significantly improved sleep quality and reduced depression scores compared to controls.
2. CD38 inhibition and NAD+ preservation
Apigenin is a potent in vitro inhibitor of CD38, the enzyme responsible for ~70% of NAD+ degradation in cells. In mouse models, apigenin increases tissue NAD+ levels. If this translates to humans, apigenin could complement NMN/NR supplementation — but human RCTs are lacking.
3. Anti-inflammatory and antioxidant effects
Apigenin inhibits NF-kB signaling (reducing inflammatory gene transcription) and scavenges reactive oxygen species in cell culture studies. Clinical anti-inflammatory evidence in humans is not established through RCTs.
Supplement forms compared
| Form | Typical dose / Bioavailability | Best for | Notes |
|---|---|---|---|
| Chamomile extract (standardized to apigenin) | Moderate (variable bioavailability) | Sleep support, mild anxiety, natural apigenin source | Traditional and safe source. 200–400 mg dried extract (1–2% apigenin = 2–8 mg apigenin). |
| Pure apigenin (supplement) | Moderate (water-insoluble; absorption improves with fat) | Longevity protocols, CD38 inhibition, higher doses | 25–100 mg/day typical supplement doses. Take with a fat-containing meal for better absorption. |
| Chamomile tea | Low (small dose per cup) | Sleep ritual, mild relaxation | ~3–6 mg apigenin per cup; consistent gentle dose suitable for daily use. |
How much should you take?
- Chamomile extract: 200–400 mg/day
- Pure apigenin supplement: 25–100 mg/day
- Chamomile tea: 1–2 cups before bed
- No established RDA or Tolerable Upper Intake Level
Take apigenin with a fat-containing meal to improve absorption (apigenin is fat-soluble). For sleep benefits, take 30–60 minutes before bed. For longevity/NAD+ protocols, morning dosing is typical.
Safety and side effects
Common side effects
- Generally excellent tolerability at chamomile/tea doses
- Possible drowsiness — do not drive after taking high doses
- Rare allergic reactions in people with ragweed, chrysanthemum, or daisy sensitivity (Asteraceae family)
Serious risks
Apigenin is generally safe at chamomile doses used traditionally for centuries. At high supplement doses (50–100 mg), safety data in humans is limited. People with hormone-sensitive conditions (estrogen-receptor positive cancers) should be cautious as apigenin has weak estrogenic activity. Consult physician if taking blood thinners.
Drug and nutrient interactions
- Warfarin (anticoagulants) — apigenin inhibits CYP2C9, which metabolizes warfarin; may increase warfarin levels and bleeding risk; monitor INR
- Benzodiazepines and sedatives — additive CNS sedation; avoid combining with sleep medications unless under physician guidance
- Estrogen and hormone therapy — weak estrogenic activity; caution in hormone-sensitive cancers
Check our free interaction checker for additional combinations.
Who might benefit — and who should use caution
| Most likely to benefit | Use with caution or seek guidance |
|---|---|
| People with mild sleep difficulties wanting a gentle natural approach | People with estrogen-receptor positive cancers — discuss with oncologist |
| Those pursuing NAD+ optimization alongside NMN or NR | People on warfarin or blood thinners — monitor INR |
| Individuals with chamomile tea history who want standardized dosing | Pregnant women — insufficient safety data for high-dose apigenin supplements |
Frequently asked questions
How does apigenin support NAD+ levels?
Apigenin inhibits CD38, an enzyme responsible for degrading approximately 70% of cellular NAD+. By blocking CD38, apigenin theoretically reduces NAD+ breakdown, increasing available NAD+. This effect has been confirmed in mice; human trials comparing apigenin to NMN/NR for NAD+ elevation are not yet published.
Is chamomile tea the same as apigenin supplements?
Chamomile tea provides a low but consistent dose of apigenin (~3–6 mg/cup) with centuries of safety history. Apigenin supplements typically provide 25–100 mg — 5–30 times more per dose. For sleep and relaxation, chamomile tea is appropriate. For longevity/NAD+ protocols, higher-dose supplements are used but with less clinical backing.
Can apigenin cause drowsiness?
At chamomile doses, apigenin causes mild, pleasant relaxation. At high supplement doses, drowsiness is more likely. Do not drive or operate heavy machinery after taking high-dose apigenin supplements.
Does apigenin interact with medications?
Yes — apigenin inhibits the CYP2C9 enzyme, which metabolizes warfarin and some other drugs. This can increase drug levels and effects. People on warfarin should monitor INR carefully. Additive sedation can occur with benzodiazepines and sleeping medications.
Is apigenin safe for long-term use?
At chamomile tea doses, apigenin has an excellent long-term safety record. At higher supplement doses (50–100 mg), long-term human safety data is limited. Avoid high-dose supplements during pregnancy and if you have hormone-sensitive conditions or take blood thinners.
Related ingredients
NAD+ Precursors (NMN/NR)
Complements apigenin's CD38 inhibition by providing NAD+ building blocks.
Fisetin
Another flavonoid with senolytic and longevity research interest.
Lemon Balm
Another herb with GABA-modulating effects for sleep and anxiety.
Disclaimer: This information is for educational purposes only and should not replace medical advice. Always consult a qualified healthcare provider before starting any supplement, especially if you have a medical condition, are pregnant, or take prescription medications. 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.