Comparison
Magnesium L-Threonate vs Krill Oil
Magnesium L-Threonate
MIT-developed magnesium that crosses the blood-brain barrier. Shown to enhance synaptic density and reduce 'brain age'.
Krill Oil
Phospholipid-bound omega-3 from Antarctic krill. Contains EPA and DHA in phospholipid form (more bioavailable than triglyceride fish oil) plus astaxanthin.
| Field | Magnesium L-Threonate | Krill Oil |
|---|---|---|
| Category | neuroprotective | neuroprotective |
| Dose range | 1000–2000mg | 500–2000mg |
| Half-life | 6h | — |
| Onset | — | — |
| Evidence | EVIDENCEB | EVIDENCEB |
| Safety | ●●●●● | ●●●●○ |
| Legal (US) | USOTC | USOTC |
| PubMed refs | 90 | 380 |
The comparison in plain English
Auto-generated from dataMagnesium L-Threonate and Krill Oil are both in the neuroprotective category respectively. Magnesium L-Threonate MIT-developed magnesium that crosses the blood-brain barrier. Krill Oil Phospholipid-bound omega-3 from Antarctic krill.
Bottom line
Magnesium L-Threonate (evidence B, safety 5/5) matches the evidence base of Krill Oil (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 Krill Oil if
Krill Oil is the better fit when your goal aligns with its mechanism (Krill oil delivers omega-3 fatty acids (EPA and DHA) bound to phospholipids rather than triglycerides) and the dose range (500–2000mg) suits your protocol. Half-life is —h.