New research provides clarity for patients and clinicians navigating the crowded magnesium supplement market. The evidence-based takeaway is straightforward: focus on total intake, not form.
First, long-term studies show no cognitive advantage for specific magnesium salts—whether citrate, L-threonate, or oxide. Second, brain imaging demonstrates that total magnesium consumption correlates with healthier gray matter and hippocampal volumes critical for memory function. The protective effects appear independent of which salt formulation delivers the magnesium.
Third, while head-to-head comparisons of different forms remain incomplete, current evidence suggests that consistent intake of any well-absorbed magnesium form at therapeutic doses provides comparable cognitive benefits. For practical purposes, this means patients need not invest in premium formulations; rather, selecting an affordable, bioavailable magnesium source and maintaining consistent intake offers the most benefit. Clinicians should counsel patients accordingly, emphasizing total dietary and supplemental magnesium intake over formulation marketing claims.
Read the full article on GMJ Newsroom.
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