Apigenin (Chamomile Flavone · Anxiolytic · GABA-A Modulator)
| CAS No. | 520-36-5 |
| Class | Polyphenol · Flavone · Flavonoid |
| Source | Matricaria chamomilla (Chamomile) flowers — highest concentration; Petroselinum crispum (Parsley); celery, artichoke, oregano, thyme |
| Claim strength | Moderate |
| Buy from Herbuno | Apigenin 98% Powder (Botanical Source Varies) | High-Purity Flavone Isolate → · Apigenin 98% Powder (Chamomile) | High-Purity Isolate | Matricaria recutita → |
Traditional roots: Chamomile (Matricaria chamomilla), the primary source of apigenin, has been used medicinally since ancient Egypt and was one of the nine sacred herbs of the Anglo-Saxons — employed for fever, inflammation, and nervous conditions across millennia. Mechanism identified: Modern pharmacological characterisation revealed apigenin as a partial agonist at GABA-A benzodiazepine binding sites — the same receptor complex targeted by pharmaceutical anxiolytics and sedatives — though with weaker affinity and a benign safety profile. Longevity dimension: Apigenin has more recently been identified as an activator of cellular autophagy via mTOR inhibition and as a promoter of NAD+ metabolism, placing it within the healthy aging research space alongside fisetin and quercetin. Consumer awareness: Andrew Huberman's popularisation of the 50 mg pre-sleep protocol has significantly driven formulator and consumer interest in isolated apigenin.
Evidence for Anxiety, Sleep Support & Cellular Homeostasis
Anxiolytic and sleep-supporting: Apigenin binds the benzodiazepine site on GABA-A receptors as a partial agonist. Multiple animal studies document anxiolytic effects without tolerance development or dependence. A human crossover RCT with chamomile extract standardised to apigenin showed significant reductions in GAD (Generalised Anxiety Disorder) scores. Preliminary human sleep research at 25–50 mg documents improvements in sleep onset and quality. Claim strength: Moderate.
Anti-inflammatory: Inhibits COX-2 expression, NF-κB activation, and pro-inflammatory cytokine production. Documented mast cell stabilisation activity comparable to quercetin. Claim strength: Moderate.
Neuroprotection and autophagy: Promotes neurogenesis and neuronal differentiation in stem cell models, inhibits acetylcholinesterase mildly, and activates autophagy via mTORC1 inhibition — positioning it in longevity and brain health stacks. Claim strength: Emerging.
Apigenin 98% Powder (Botanical Source Varies) | High-Purity Flavone Isolate →
Apigenin 98% Powder (Chamomile) | High-Purity Isolate | Matricaria recutita →
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Dosage, Bioavailability & Formulator Specification
Clinical dose: 25–50 mg/day for anxiety and sleep support; chamomile extract trials use the equivalent of approximately 14–28 mg of apigenin daily. Longevity/autophagy protocols: 50 mg/day.
Bioavailability: Moderate — better than quercetin aglycone due to lipid solubility. Achieves meaningful plasma and CNS concentrations at supplement doses. Fat co-administration improves absorption.
Two available grades: High-purity isolate (98%) from chamomile or parsley for standalone apigenin supplements. Chamomile extract standardised to apigenin % (typically 1.2–2%) for formulations where the whole-herb botanical complex is desired alongside the isolated marker compound.
Synergistic pairs: L-theanine (anxiolytic/relaxation stack), lemon balm extract (GABA transaminase inhibition + GABA-A activity), passionflower extract (isovitexin + apigenin for sleep), magnesium glycinate (comprehensive sleep formula), ashwagandha (cortisol + GABAergic calming).
Frequently Asked Questions — Apigenin
How does apigenin produce calming and sleep-supporting effects?
Apigenin binds to the benzodiazepine binding site on GABA-A receptors as a partial agonist, potentiating GABA's inhibitory effects on neuronal excitability. This produces mild anxiolytic and sedative effects without the tolerance, dependence, or respiratory depression risk associated with pharmaceutical benzodiazepines.
What dose is needed for sleep and anxiety support?
Chamomile extract trials provide approximately 14–70 mg of apigenin per day. For isolated apigenin, 25–50 mg/day covers the clinically referenced range for anxiolytic and sleep-supportive effects. The widely cited 50 mg before sleep protocol sits at the upper end of the studied range.
Does apigenin cause daytime drowsiness?
At supplement doses (25–50 mg), apigenin is not reported to cause significant daytime sedation. Its partial agonist profile produces anxiolytic effects at lower doses and sleep-promoting effects at higher doses, with dose-dependent mild sedation unlikely to impair daytime cognitive function.
Is chamomile extract the same as isolated apigenin?
No. Chamomile extract standardised to apigenin provides apigenin alongside α-bisabolol, chamazulene, and other flavonoids (luteolin, quercetin), reflecting the traditional multi-component botanical. Isolated 98% apigenin provides the pure compound for precise dosing and is appropriate for formulations where apigenin is the specific primary active.
Claim-strength scale – High = multiple human RCTs; Moderate = limited trials or strong preclinical convergence; Emerging = early-stage lab or animal data.
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