💊 What it does
Magnesium L-threonate is a patented magnesium compound developed specifically to increase magnesium levels in the brain. It is the only form of magnesium that has been shown in studies to cross the blood-brain barrier effectively and raise cerebral magnesium concentrations. Clinical evidence suggests benefits for memory, cognitive flexibility, and sleep quality — particularly in older adults. While all magnesium forms benefit general magnesium status, L-threonate is the only form with evidence specifically for brain magnesium and cognitive applications.
👤 Who needs it
People with cognitive concerns — memory, focus, mental clarity. Older adults experiencing age-related cognitive decline. Those with sleep difficulties, particularly difficulty maintaining sleep through the night. People who have tried other magnesium forms for sleep or cognition without sufficient effect.
🥦 Food sources first
Same food sources as other magnesium forms: pumpkin seeds, dark chocolate, almonds, spinach, avocado, black beans. However, no food source specifically elevates brain magnesium — this is specific to the L-threonate form.
🗓 When to supplement
When cognitive benefits or brain-specific magnesium elevation are the primary goal. For sleep maintenance rather than just sleep onset. As a premium alternative to magnesium glycinate when cognitive effects are the priority.
🏷 Best form to look for
Magtein (branded magnesium L-threonate) is the form used in clinical trials. Note that the elemental magnesium per dose is lower than other forms — typically 3 capsules provide 144 mg elemental magnesium, which is less than 2 glycinate tablets. The value is in the brain-targeting delivery, not elemental magnesium quantity.
⏰ When to take it
Evening, 1-2 hours before bed — cognitive-relaxing effects support sleep quality. Can split: 1 capsule in the morning and 2 in the evening.