Magnesium Glycinate, ranked by real cost

Magnesium glycinate, also known as magnesium bisglycinate, is a form of magnesium chelated to two molecules of the amino acid glycine. This chelation improves gastrointestinal tolerability compared to less bioavailable forms like magnesium oxide or citrate, making it a common choice for people who experience digestive discomfort from other magnesium supplements. It''s widely used for sleep quality, muscle relaxation, and general magnesium deficiency correction. Magnesium glycinate is approximately 14% elemental magnesium by weight. Supplement labels typically show a line like "Magnesium (as magnesium glycinate) 200mg" — the number next to "Magnesium" is the elemental magnesium content, which is what the body actually absorbs. Some products list a larger "magnesium glycinate" compound weight separately; this compound number is not directly comparable across products because it includes the bound glycine. A minority of products are "buffered" with magnesium oxide to increase the elemental magnesium per capsule at a lower cost, though this is rarely disclosed on the label. Most research uses 200–400mg elemental magnesium per day. Products below are ranked by cost at your chosen daily dose.