The invention provides methods for treatment of conditions which require phytosterol therapy without adversely affecting the bioavailability of lipophilic vitamins or lipophilic drugs. The method includes administering a mixture of phytosterol ester(s) (PS-E) and 1,3-diglyceride(s) (DAG) dissolved in an edible oil or fat. The invention also provides a method of improving weight management and a method of treating metabolic conditions that result in overweight. Dietary nutrients, food supplements and food articles containing the mixture are also provided.