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Pettinger WA, Soyangco F, and Oates JA, Inhibition of Monoamine Oxidase in Man by Furazolidone, Clin Pharmacol Ther , 1968, 9:442

Blocks Melanin Production: It blocks an enzyme known as tyrosinase

If you notice cloudiness, floating particles, or an unusual color change, that's your cue to discard it and use a fresh supply

PMID: 37062921

For the time being, SC supplementation continues to be the advised method of supplementation in EPI
