**Magtein Magnesium L-Threonate** at 2,000mg per serving (144mg elemental magnesium) — this is the exact dose used in the MIT-developed human trials studying memory and cognitive function. L-threonate is the only magnesium form shown to meaningfully raise brain magnesium levels, making this a targeted pick if your goal is cognitive support rather than general magnesium supplementation.

Your 144mg of elemental magnesium falls comfortably within the 100–400mg clinical supplemental range, and the premium form means absorption isn't a concern. The brain-specific research also gives this product relevance for sleep and stress — magnesium broadly supports nervous system relaxation, and the threonate form may offer additional benefit for mood and mental clarity.

The tradeoff is that 144mg is modest if you're looking for whole-body magnesium coverage — muscle recovery, heart rhythm, or bone support typically call for 300–400mg daily. If brain health is your priority, this delivers. If you need broader magnesium support, you'd want to supplement with an additional form.