Comparison
Magnesium L-Threonate vs Spirulina
Magnesium L-Threonate
MIT-developed magnesium that crosses the blood-brain barrier. Shown to enhance synaptic density and reduce 'brain age'.
Spirulina
Blue-green microalgae used as nutritional supplement. High protein, complete amino acids, phycocyanin antioxidant.
| Field | Magnesium L-Threonate | Spirulina |
|---|---|---|
| Category | neuroprotective | neuroprotective |
| Dose range | 1000–2000mg | 1000–5000mg |
| Half-life | 6h | — |
| Onset | — | — |
| Evidence | EVIDENCEB | EVIDENCEB |
| Safety | ●●●●● | ●●●●○ |
| Legal (US) | USOTC | USOTC |
| PubMed refs | 90 | 2400 |
The comparison in plain English
Auto-generated from dataMagnesium L-Threonate and Spirulina are both in the neuroprotective category respectively. Magnesium L-Threonate MIT-developed magnesium that crosses the blood-brain barrier. Spirulina Blue-green microalgae used as nutritional supplement.
Bottom line
Magnesium L-Threonate (evidence B, safety 5/5) matches the evidence base of Spirulina (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 Spirulina if
Spirulina is the better fit when your goal aligns with its mechanism (Provides complete protein with all essential amino acids) and the dose range (1000–5000mg) suits your protocol. Half-life is —h.