Key result
The addition of minute amounts of synthetic pteroylglutamic acid (folic acid) reduced the rate of oxidation by milk xanthopterin oxidase to less than 5% of its original activity.
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Folic acid (pteroylglutamic acid) was noted as early as 1948 to be a strong inhibitor of xanthine oxidase.
Kurt A. Oster (1977) reported a letter. Folic acid (pteroylglutamic acid) was evaluated on Xanthine oxidase activity. The addition of minute amounts of synthetic pteroylglutamic acid (folic acid) reduced the rate of oxidation by milk xanthopterin oxidase to less than 5% of its original activity.
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