The only magnesium form clinically shown to cross the blood-brain barrier and boost brain magnesium levels. A 2026 clinical trial found it improved working memory and reaction times in healthy adults with poor sleep.
If you care about brain health and memory alongside sleep, L-threonate is the only form with real science showing it reaches your brain. It's pricier, but it's the only magnesium that addresses cognitive function directly—not just relaxation.
“Best magnesium L-threonate supplement: Sports Research Magtein Magnesium L-Threonate Capsules”
Healthline Sleep Experts · read full review →
“A 2026 clinical trial showed that magnesium L-threonate improved overall cognition especially in the areas of working memory and reaction times in healthy adults with poor sleep.”
Good Housekeeping · read full review →
“Magnesium L-threonate is a well absorbed magnesium that is most notable for boosting the concentration of magnesium within our brains, and is often promoted to help with memory retention and depression.”
Registered Nutritionist · read full review →
