Riboflavin is typically found as one of its coenzymes, NADPH.

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Riboflavin is not typically found as NADPH. NADPH is a reduced form of NADP+ and contains an additional phosphate group compared to NADH, which is a reduced form of NAD+. Riboflavin is a precursor to flavin mononucleotide (FMN) and flavin adenine dinucleotide (FAD), which are coenzymes that consist of riboflavin bound to adenosine monophosphate or adenosine diphosphate, respectively. These coenzymes participate in oxidation-reduction reactions as electron carriers.

Riboflavin Is Typically Found as One of Its Coenzymes, NADPH