https://pubmed.ncbi.nlm.nih.gov/2678166/
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Two interconnected B vitamins: riboflavin and pyridoxine
Vitamin B6 needs to be converted in the human body to its active coenzyme form, pyridoxal 5'-phosphate (PLP), in a process which requires riboflavin in its cofactor form of flavin mononucleotide (FMN).
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