Comparison
Magnesium L-Threonate vs Inositol (Myo-Inositol)
Magnesium L-Threonate
MIT-developed magnesium that crosses the blood-brain barrier. Shown to enhance synaptic density and reduce 'brain age'.
Inositol (Myo-Inositol)
Sugar alcohol that functions as a second messenger in cellular signaling. Studied for PCOS, anxiety, and panic disorder.
| Field | Magnesium L-Threonate | Inositol (Myo-Inositol) |
|---|---|---|
| Category | neuroprotective | neuroprotective |
| Dose range | 1000–2000mg | 2000–18000mg |
| Half-life | 6h | — |
| Onset | — | — |
| Evidence | EVIDENCEB | EVIDENCEA |
| Safety | ●●●●● | ●●●●● |
| Legal (US) | USOTC | USOTC |
| PubMed refs | 90 | 3800 |
The comparison in plain English
Auto-generated from dataMagnesium L-Threonate and Inositol (Myo-Inositol) are both in the neuroprotective category respectively. Magnesium L-Threonate MIT-developed magnesium that crosses the blood-brain barrier. Inositol (Myo-Inositol) Sugar alcohol that functions as a second messenger in cellular signaling.
Bottom line
Magnesium L-Threonate (evidence B, safety 5/5) has a stronger evidence base than Inositol (Myo-Inositol) (evidence A, safety 5/5). 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 Inositol (Myo-Inositol) if
Inositol (Myo-Inositol) is the better fit when your goal aligns with its mechanism (Functions as a precursor to phosphatidylinositol, a key second messenger system in intracellular signaling) and the dose range (2000–18000mg) suits your protocol. Half-life is —h.