Comparison
Magnesium L-Threonate vs Quercetin
Magnesium L-Threonate
MIT-developed magnesium that crosses the blood-brain barrier. Shown to enhance synaptic density and reduce 'brain age'.
Quercetin
Flavonoid found in onions, apples, capers. Senolytic (especially with dasatinib), antiviral, anti-inflammatory.
| Field | Magnesium L-Threonate | Quercetin |
|---|---|---|
| Category | neuroprotective | neuroprotective |
| Dose range | 1000–2000mg | 250–1000mg |
| Half-life | 6h | — |
| Onset | — | — |
| Evidence | EVIDENCEB | EVIDENCEB |
| Safety | ●●●●● | ●●●●○ |
| Legal (US) | USOTC | USOTC |
| PubMed refs | 90 | 4600 |
The comparison in plain English
Auto-generated from dataMagnesium L-Threonate and Quercetin are both in the neuroprotective category respectively. Magnesium L-Threonate MIT-developed magnesium that crosses the blood-brain barrier. Quercetin Flavonoid found in onions, apples, capers.
Bottom line
Magnesium L-Threonate (evidence B, safety 5/5) matches the evidence base of Quercetin (evidence B, safety 4/5). Magnesium L-Threonate has the slightly cleaner safety profile. For users new to either, the higher-evidence option is the safer first try.
Choose Magnesium L-Threonate if
Magnesium L-Threonate is the better fit when your goal aligns with its mechanism (L-threonate is a sugar-acid carrier that uniquely enables magnesium to cross the blood-brain barrier in meaningful quantities — most oral magnesium forms (oxide, citrate, glycinate) raise serum magnesium but not central magnesium) and the dose range (1000–2000mg) suits your protocol. Half-life is 6h.
Choose Quercetin if
Quercetin is the better fit when your goal aligns with its mechanism (Senolytic activity that is substantially amplified when combined with the prescription drug dasatinib — this combination (D+Q) is the most-studied senolytic intervention in current human trials) and the dose range (250–1000mg) suits your protocol. Half-life is —h.