PROBLEM TO BE SOLVED: To provide a Serenoa repens extracts containing-formulation that inhibits the discoloration of Serenoa repens extracts over time.SOLUTION: A Serenoa repens extracts containing-formulation is prepared by blending Serenoa repens extracts with Piper longum products. It is preferable that Peucedanum japonicum products are further blended to obtain the Serenoa repens extracts containing-formulation.