Quadruple Magnesium Supplement, 400mg of Chelate Magnesium Glycinate

What the brand says

Sold as “Quadruple Magnesium Supplement, 400mg of Chelate Magnesium Glycinate, L-threonate, Citrate & Malate | Max Absorption Complex w/Vitamin D3 & B6, for Sleep Heart Muscles Nerves, Non-GMO, 120”