Developed in the lab and tested by women. The clinically tested Lash Serum from L’Oréal Paris provides fuller, stronger, and longer-looking lashes. This ophthalmologist-tested serum, enriched with hyaluronic acid, amino acids, and castor oil, intensely nourishes the lashes. The lash line appears denser and more voluminous. The texture is pleasantly odorless and color-neutral, and it does not stick. With the brush applicator, the serum can be precisely applied to the entire lash line, from the base to the tips. Testers have confirmed: the lashes look stronger and the lash line appears fuller. When used twice a day, initial results are visible after just four weeks.