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. 2022 Aug 12;13:929262. doi: 10.3389/fphar.2022.929262

TABLE 3.

Compounds that inhibit FMO3 activity.

FMO3 inhibitor Results Mechanism References
Thiamazole Decreased TMAO level, increased TMA level Thiamazole is classic substrate and competitive inhibitor of FMO3 Schweifer and Barlow (1996)
3,3′-Diindolylmethane Decreased TMAO level 3,3′-Diindolylmethane inhibits FMO3 Chen et al. (2019)
Cashman et al. (1999)
Consuming indole Decreased the relative ratio of TMAO to TMA Consuming indole competitively inhibits FMO3 Steinke et al. (2020)