Rodan + Fields Lash Boost is a popular lash enhancer that helps improve the appearance of lashes. This serum is formulated with a blend of peptides, biotin, and keratin that work together to nourish and strengthen lashes. With regular use, you can expect to see longer, fuller, and more voluminous lashes. The serum is easy to apply and is safe for use with lash extensions. It is also ophthalmologist-tested and suitable for all skin types.