In the present invention, a lipocalin family protein and/or a lipocalin family proteolytic product obtained by using a protease such as pepsin or pancreatin to decompose a lipocalin family protein is used as the active ingredient in a hyaluronic acid production promoter, a collagen production promoter, a food/beverage, and a collagen production promoting cosmetic. This lipocalin family protein and/or lipocalin family proteolytic product has the effect of increasing the amount of collagen.