The present invention relates to a method for the production of a hop extractwhich is enriched in 8-prenylnaringenin with respect to 6-prenylnaringenin,which method comprises the steps of subjecting a hop product to (1) anisomerisation reaction in the presence of water as a solvent and in thepresence of an amount of a base and (2) to at least one extraction. In thatway a hop extract may be extract is obtained which contains 6-prenylnaringeninand 8-~prenyinaringening in a ratio (8-prenylnaringenin x 100%)/(8-prenylnaringenin + 6~prenyInaringenin) of at least 50%. The extract preferablyalso contains xanthohumol, the weight ratio of xanthohumol to 8-prenylnaringenin being at least 10.
