Brow and Lash Serum combines nourishing actives with Keratinocyte Growth Factor (KGF) for hair that looks thicker, stronger, and healthier. Exclusive Sea Kelp Bioferment is a nutrient and mineral dense anti-inflammatory that contributes to overall skin health. This lash extender serum should be applied to the brow line and/or lash line twice daily. Can be used under makeup or with lash extensions.