A magnesium supplement providing 500 mg per vegetarian capsule in a blend of three forms—magnesium oxide, citrate, and succinate. Designed to support cardiovascular function, bone health, nervous system function, and energy metabolism. Take one capsule one to three times daily; note that higher doses may have a laxative effect.
Meta-analyses and RCTs support magnesium supplementation for sleep quality, particularly in older adults and those with low baseline magnesium status. The strongest evidence concerns sleep latency and quality rather than healthy individuals. Dosing and form variability across trials limit generalizability.
Mechanism
Magnesium is a cofactor in >300 enzymatic reactions, including those governing muscle relaxation, nervous system signaling, and ATP synthesis. Low magnesium status has been associated with sleep disruption, anxiety, and muscle tension; supplementation may restore these functions in deficient individuals.
“BACKGROUND: Magnesium supplementation is often purported to improve sleep; however, as both an over-the-counter sleep aid and a complementary and alternative medicine, there is limited evidence to support this assertion.”
“Magnesium is the most abundant intracellular divalent cation and essential for maintaining normal cellular physiology and metabolism, acting as a cofactor of numerous enzymes, regulating ion channels and energy generation.”
“Vitamin D and magnesium are essential nutrients that play key roles in an athlete's performance, recovery, and overall health.”
Caveats
Most studies enrolled older adults or those with documented magnesium deficiency or sleep disorders; evidence in young, healthy, replete individuals is sparse. Bioavailability varies by form (oxide absorbs poorly; glycinate and threonate absorb better). Gastrointestinal side effects (loose stool) are common at doses >400 mg/day. RCTs are typically short-term (<12 weeks), so long-term safety and efficacy remain incompletely characterized. The 500 mg dose in this product exceeds the RDA (Recommended Dietary Allowance; 400 mg/day for men, 310 mg/day for women) and could cause GI upset in sensitive individuals.
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