MAGNIFIES AND BOOSTS LENGTHBiotin and Hyaluronic Acid are the crucial potent in Fine Threads Advanced Biotin serum. Lash and Brow Growth Serum helps condition & protect to minimize breakage and bring hydration to dry, brittle lashes. Improves health of lashes and brows by adding shine, volume, strengthening thinning by promoting and protecting its length. VEGAN-FRIENDLYBotanically derived ingredients that is safe to use on delicate tissues along the lash line and beneath eyebrows. 2 IN 1 FORMULAOne step formula for your Brows and Lashes. This advanced eyelash serum uses botanical extracts rich in peptides and amino acids to turbocharge production of keratin, the key structural protein of hair. The result is longer, stronger and fuller lashes that resist breakage, damage and loss. EASY TO USE Apply a thin line just like an eyeliner along the base of your upper and lower lash line once a day at nigh time. You can apply serum on clean eyebrows as well. Use daily for the perfect lash boost.