neuLash neuBROW Brow Enhancing Serum is a brow-enhancing formula that helps create a thicker-looking and renewed appearance within 3 to 4 weeks. Its Dual-Weight Protein Complex promotes a stronger and healthier feel to your eyebrows to minimize a sparse, thinning look. Biotin, an essential B vitamin, keeps brows protected from further damage. | neuLash neuBROW Brow Enhancing Serum, 0. 2 fl. oz | Dermstore