Fumonisin B3 (FB3) is a mycotoxin that has been found in Fusarium. It is cytotoxic to primary rat hepatocytes when used at concentrations of 125, 250, and 500 μM. Dietary administration of FB3 (0.05%) for 14 or 21 days induces hepatocyte nodules, a marker of cancer initiation, in rats. FB3 has been detected in corn and corn-based foods and livestock feeds.
