Amp up the appearance of your natural lashes and brows in just weeks! e.l.f. Enhancing Lash & Brow Serum is powered by antioxidants, amino acids, and vitamins to give you noticeably longer and fuller lashes and brows that will have people asking, are those lash extensions?! The conditioning formula helps to nourish thin, brittle, and short hairs for your healthiest looking lashes and brows ever.