Neutrogena Healthy Lashes Lash Enhancer Serum is a gentle and effective lash enhancer that helps improve the appearance of lashes. This serum is formulated with a unique blend of peptides, biotin, and hyaluronic acid, which work together to nourish and strengthen lashes. With regular use, you can expect to see longer, fuller, and healthier-looking lashes. The serum has a lightweight formula that is easy to apply and is suitable for all skin types. It is also ophthalmologist-tested and safe for use with lash extensions.