A medicinal combination of herbs, herbal extracts, and their chemical constituents that is synergistically effective for promoting human and veterinary health. The combination is a blood lipid level lowering synergistic composition comprising Ku ding cha, berberine or a berberine-containing plant extract, and other optional active ingredients. Methods of extraction and combination in synergistic amounts are also disclosed. The compositions according to the present invention may be used to treat or reduce the chance of contracting or the progression of a number of diseases or conditions in a subject, particularly cardiovascular diseases.