Provided is a nutrient composition for promoting collagenproduction, which contains vitamin C, an iron preparation, andcollagen as active ingredients, promotes collagen production ina living body such as skin or bone, prevents or treats skin agingor bone and joint diseases, and is an iron preparation-containingcomposition having stability imparted thereto. Also provided area food or beverage, a feed, and a medicine each containing the nutrientcomposition incorporated therein.
