The lash pros have spoken—Borboletas clinically tested Lash Serum will give your lashes life and load them up with nourishing ingredients so they can do all the lash things while maintaining natural lash health. Consider this serum every lash-lover's best friend. Just one swipe each night makes lashes look fuller and thicker in as little as 4 weeks, with full results at 8 weeks The good-for-you formula works magic on natural lashes and is perfectly safe for lash extensions, too It’s cruelty-free, fragrance-free, opthamologist-tested, and made in the USA