What is the number which is listed as the first ingredient on some bottles? September 21, 2020 19:31 Updated 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 you use dimethicone in your products? Where are AlumierMD products manufactured? Does AlumierMD use parabens or sulfates in their products? Why does my EverActive C&E + Peptide serum leave behind a white residue?