Vanillylmandelic acid
（重定向自Vanillyl mandelic acid）
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![Norepinephrine degradation. Vanillylmandelic acid is shown at top right. Enzymes are shown in boxes.[2]](/Images/godic/202502/19/Noradrenaline_breakdown.svg4944.png")
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Vanillylmandelic acid (VMA) is a chemical intermediate in the synthesis of artificial vanilla flavorings and is an end-stage metabolite of the catecholamines, epinephrine, and norepinephrine. It is produced via intermediary metabolites.