EnvyDerm Eyelash Enhancement & Conditioning Nighttime Serum uses a specially formulated blend of ingredients to promote your natural keratin production in the lash line to help the follicle grow naturally stronger lashes. EnvyDerm's latest Peptides technology is clinically proven to increase length and density of lashes by 25% and by as much as 72% in 6 weeks of use. In addition, Proteins, Vitamins and Moisturizing Oils nourish, lengthen and strengthen the eyelash hairs. Our product contains only safe natural ingredients that have been proven to grow and thicken eyelashes effectively. The serum has undergone clinical tests to prove effectiveness The Serum uses the leading peptide technology to induce keratin production in the lash line thus promoting longer, stronger enhanced lashes. Moreover the proteins, vitamins, minerals and moisturizing oils fortify, nourish and add shine to for beautiful enhanced lashes and brows. Lashes lose fullness due to everyday wear and tear, make-up removal and the aging process. Eyelash hairs are quicker to break, more prone to fall out, and slower to grow than other hair. This is why it's so important to defend the eyelashes. EnvyDerm Eyelash Enhancement and Conditioning Nighttime Serum should last from 3 to 6 months depending on personal use. Expect three months of use on the upper and lower lash lines and brows and 6 months if only used on the upper lash line.