A cosmetic composition contains (based on total composition weight) a combination of: (a) hyaluronic acid (0.001-3%); and (b) a saponin (0.01-4%). Independent claims are also included for: (1) a composition containing (a) (0.001-3%) and a leguminous extract (0.01-8%) containing a saponin at 0.01-99% of the extract; (2) a composition containing (a) (0.001-3%) and a soya extract (0.01-8%) containing a saponin at 0.01-99% of the extract; and (3) preparation of the above compositions.