Malic acid (Standard) is the standard substance of Malic acid, and it is applicable for quantitative analysis, quality control, and related research in biochemical experiments. 1. Malic acid (Pomalus acid) did reduce populations of L. monocytogenes on poultry. 2. Malic acid supplementation may be useful for conservative treatment of calcium renal stone disease by virtue of its capacity to induce these effects.