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Apigenin – The Flavonoid for NAD+, Sleep, and Anti-Inflammation
What is Apigenin?
Apigenin (4',5,7-trihydroxyflavone) is a natural flavonoid polyphenol found in numerous plant food sources, with particularly high concentrations in chamomile (up to 68 mg/100 g dried flowers), parsley, celery seeds, thyme, artichokes, and marjoram. As one of the most extensively studied plant compounds, apigenin has long been known primarily for its anxiolytic and anti-inflammatory properties. More recently, its role as a potent CD38 inhibitor has brought it into focus in longevity research – CD38 degrades NAD+ in the body, and by inhibiting CD38, apigenin can increase NAD+ levels, thus acting synergistically with NMN.
Biochemical Mechanism of Action
Apigenin exerts its effects through several mechanisms simultaneously: As a CD38 inhibitor, it inhibits the NAD+-glycohydrolase activity of this enzyme, leading to increased cellular NAD+ availability. As a modulator of the GABA-A receptor, it explains its anxiolytic and sedative effects. By inhibiting NF-κB signaling and COX-2 expression, apigenin reduces pro-inflammatory cytokines. Additionally, apigenin activates telomerase (hTERT) and protects DNA from oxidative damage.
Scientifically Proven Effects
| Effect | Evidence Level | Effect Size |
|---|---|---|
| Anxiolytic and mild sedation (chamomile extract) | Moderate (RCTs with chamomile extract) | Low–Medium |
| Anti-inflammatory effect (NF-κB inhibition) | Moderate–Strong (in vitro + animal models) | Medium |
| CD38 inhibition and NAD+ increase | Strong (in vitro, initial human studies) | Medium–High |
| Antioxidant effect (free radicals) | Strong (in vitro, animal models) | Medium |
| Sleep support (apigenin-rich chamomile tea) | Moderate | Low–Medium |
Dosage & Intake
| Goal | Recommended Dose | Time of Intake |
|---|---|---|
| NAD+ optimization (CD38 inhibition) | 50–100 mg daily | Morning, together with NMN |
| Anxiety relief / Sleep support | 50 mg in the evening | 30–60 minutes before bedtime |
| Anti-inflammatory | 50–120 mg daily | With a meal |
Apigenin is fat-soluble and is better absorbed with a fatty meal. Since it can have a mild sedative effect, many people prefer to take it in the evening. As part of an NAD+ stack (NMN + apigenin), morning intake is recommended.
Synergies & Combinations
The combination of NMN and apigenin is considered one of the most efficient ways to optimize NAD+: NMN increases NAD+ production, while apigenin inhibits NAD+ degradation by CD38. Quercetin complements as a SIRT1 activator and another CD38 inhibitor. For sleep-promoting effects, apigenin harmonizes ideally with magnesium (glycinate) and L-theanine.
Possible Side Effects & Contraindications
Apigenin has been safely consumed in food-grade quantities for millennia. In supplement form, no relevant side effects have been reported in studies. Medical consultation is necessary for existing cancer conditions. Apigenin can influence the CYP1A2 and CYP2C9 metabolism of medications – interactions with warfarin are possible.
Frequently Asked Questions (FAQ)
Do I get enough apigenin from chamomile tea?
A cup of chamomile tea provides approximately 1–3 mg of apigenin. The doses used in studies for NAD+ optimization (50–120 mg) significantly exceed what can be achieved from normal tea drinking. Concentrated extracts are necessary for therapeutic effects.
How does apigenin differ from other flavonoids?
Apigenin's uniqueness lies in the combination of CD38 inhibition, GABA-A modulation, and telomerase activation, which is not found in any other commonly supplemented flavonoid.
Can apigenin improve my sleep?
Studies with standardized chamomile extract show significant improvements in sleep onset difficulties. As a standalone sleep aid, apigenin is rather mild; however, in combination with magnesium and L-theanine, it can make a significant difference.
Conclusion
Apigenin is a versatile flavonoid with a remarkable combination of anxiolytic, anti-inflammatory, and NAD+-boosting properties. It is one of the most exciting plant compounds in the field of longevity and is particularly interesting as part of an NAD+ optimization protocol (together with NMN).
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