Our study demonstrated that two types of alfalfa seed extract: alfalfa ethanol precipitate (AEP) and alfalfa ethanol supernatant (AES) inhibited melanogenesis through the downregulation of tyrosinase expression, following the inactivation of CREB, b‐catenin and ERK signalling pathway in α‐melanocyte‐stimulating hormone (α‐MSH)‐stimulated B16F10 mouse melanoma cells. This evidence concerns the gene TYR and melanoma.