Hair treatment agent containing an active ingredient combination with liposomes

The growth of human hair can be improved significantly when they are treated with an agent containing an active substance complex (A). The active ingredient complex (A) containing liposomes that can be constructed of betaines according to one of the formulas (B-II) or (B-III) either and / or at least one of betaines corresponding to one of formulas (BI) to (B-III ) are charged, and at least one penetration-enhancing kometischen raw material (P) and / or at least one polymer (G).