In everyday supplement use, “magnesium glycinate” and “magnesium bisglycinate” usually refer to the same idea: magnesium chelated with glycine. The term “bisglycinate” emphasizes the chelate structure (often described as magnesium bound to two glycine molecules), and many brands use it interchangeably with glycinate. However, products can differ: some are buffered, and some are blends (for example, oxide plus glycinate). The most reliable check is the supplement facts panel—look for clear labeling of elemental magnesium and the exact magnesium forms included. When comparing products, always compare elemental magnesium, not total compound milligrams. If labeling is unclear, dosing becomes imprecise and tolerability or outcomes may not match expectations.