Calcium diglutamate, sometimes abbreviated CDG and also called calcium glutamate, is a Compound (chemistry), compound with formula Ca(C₅H₈NO₄)₂. It is a calcium acid salt of glutamic acid. CDG is a flavor enhancer (E number E623)—it is the calcium analog of monosodium glutamate (MSG). Because the Glutamic acid (flavor), glutamate is the actual flavor-enhancer, CDG has the same flavor-enhancing properties as MSG but without the increased sodium content. As a soluble source of calcium ions, this chemical is also used as a first-aid treatment for exposure to hydrofluoric acid.

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{{Calcium compounds Glutamates Calcium compounds E-number additives