Magnesium Glycinate
Magnesium bound to the amino acid glycine. The most bioavailable form for brain and nervous system support — and the most commonly deficient mineral in modern diets.
What it is
Magnesium is a cofactor in over 300 enzymatic reactions including ATP production, neurotransmitter regulation, and muscle function. Glycinate form (magnesium chelated to glycine) crosses the blood-brain barrier effectively, has minimal laxative effect (unlike magnesium oxide or citrate), and the glycine itself is a mild GABAergic calming agent.
How it works
Modulates NMDA receptors (calming overactive glutamate signaling), supports GABA production (the brain's primary inhibitory neurotransmitter), regulates cortisol in response to stress, and is required for ATP-dependent processes in every cell. Deficiency manifests as anxiety, poor sleep, muscle tension, and cognitive fatigue.
What the research says
Evidence strength is ranked against the total body of peer-reviewed research, not marketing claims.
Who it helps
Adults with chronic stress, poor sleep, anxiety, or muscle tension. Knowledge workers who drink 3+ cups of coffee daily (caffeine depletes magnesium). Athletes. People on proton pump inhibitors, diuretics, or birth control (all deplete magnesium).
Who should skip it
People with kidney disease (impaired magnesium clearance can be dangerous). Anyone on heart medication — check with your doctor first. If you take it and notice loose stools, you're either taking too much or the form isn't actually glycinate (many cheap 'glycinate' products are oxide-heavy blends).
Typical dose
200-400 mg elemental magnesium per day, taken in the evening with food. For sleep, 30-60 minutes before bed. RDA is 400 mg/day but most diets provide only 250-300 mg, so the supplement fills the gap.
How to take it
Look for products that disclose 'elemental magnesium' content, not total magnesium glycinate mass. A 1000 mg magnesium glycinate capsule only provides ~140 mg elemental magnesium. Avoid magnesium oxide (terrible absorption, laxative effect). Magnesium L-threonate is better specifically for brain but much more expensive.
Common misuses
People take too much at once and get loose stools. Split the dose. People take it on an empty stomach and get nausea. Take with food. People take it in the morning and feel slightly sedated. Take it in the evening.
Where to buy
Browse Magnesium Glycinate on Amazon
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