Production of hop extracts having oestrogenic and antiproliferative bioactivity

摘要

A method for the production of a hop extract which is enriched in 8-prenylnaringenin with respect to 6-prenylnaringenin include the steps of subjecting a hop product to (1) an isomerisation reaction in the presence of water as a solvent and in the presence of an amount of a base and (2) to at least one extraction. In that way a hop extract is obtained which contains 6-prenylnaringenin and 8-prenylnaringenin in a ratio (8-prenylnaringenin×100%)/(8-prenylnaringenin+6-prenylnaringenin) of at least 50%. The extract preferably also contains xanthohumol, the weight ratio of xanthohumol to 8-prenylnaringenin being at least 10.