The present invention is a fibroblast activator, collagen production promoter, collagen contraction promoter, hyaluronic acid production promoter, ATP production promoter or melanin formation suppressor, which contains, as an active ingredient, at least one kind of compound selected from the group consisting of conagenin, a conagenin derivative, and a pharmaceutically acceptable salt thereof, as well as a composition (skin external preparation, cosmetic, pharmaceutical product or food, which is a composition for the improvement of wrinkles or a whitening composition) containing such activator, promoter or melanin formation suppressor. According to the present invention, a safe skin external preparation, cosmetic (cosmetic composition), pharmaceutical product or food, which shows a high wrinkle improving effect, can be provided, and a safe skin external preparation, cosmetic (cosmetic composition), pharmaceutical product or food, which shows a high whitening effect can be provided.