Ergothioneine vs Quercetin
A side-by-side research comparison of Ergothioneine and Quercetin across mechanism, dosing, half-life, benefits, side effects and research status.
Comparison table
| Attribute | Ergothioneine | Quercetin |
|---|---|---|
| Full name | L-Ergothioneine | Quercetin (Flavonoid Senolytic) |
| Category | Detox & Antioxidant | Detox & Antioxidant |
| Status | OTC supplement | OTC supplement |
| Mechanism | Accumulates via the OCTN1 transporter in mitochondria and other high-stress cellular compartments, where it scavenges reactive oxygen species, chelates metals, protects DNA and mitochondria, and preserves other antioxidants. | Selectively induces apoptosis in senescent cells by inhibiting pro-survival (SCAP/BCL) pathways, especially when paired with dasatinib. Also scavenges free radicals, inhibits mast-cell histamine release, and modulates NF-kB inflammatory signaling. |
| Molecular weight | 229.30 Da | 302.24 Da |
| Half-life | Very long (weeks; retained in tissue) | ~11-28 hours |
| Bioavailability | Good oral via OCTN1 transporter | Low; improved by phytosome/bromelain formulations |
| Typical dose | 5-25 mg per day | 500-1000 mg per day (daily) or high-dose pulsed (senolytic) |
| Frequency | Once daily | Daily or intermittent |
| Route | Oral capsule | Oral capsule |
Ergothioneine reported benefits
- Potent cellular and mitochondrial antioxidant
- Long tissue retention
- DNA and lipid protection
- Neuroprotective potential
- Associated with lower age-related disease risk
- Anti-inflammatory
Quercetin reported benefits
- Senolytic (clears senescent cells)
- Antioxidant and anti-inflammatory
- Natural antihistamine
- Cardiovascular support
- Immune modulation
- Synergy with fisetin/dasatinib
Related comparisons
Research and educational reference only. Not medical advice.