What is the number which is listed as the first ingredient on some bottles? September 21, 2020 19:36 This is a formula number, allowing us to more easily identify which bottle contains which formula. Related articles What’s the difference between AlumierMD products and products sold at drugstores? Do the ingredients in AlumierMD products ever change? What clinical testing was performed on AlumierMD products? Does AlumierMD use synthetic dyes in their products? Does AlumierMD use parabens or sulfates in their products?