With Hyaluronic Acid, Argan Oil and KGF™Conditions Lashes & Brows Why Choose Lush Lash and Brow Serum? Fragrance FreeGluten FreeParaben FreeDye FreeCruelty Free Lush Lash and Brow Serum Lush Lash and Brow Serum can help protect and support the beauty of your lashes and brows with a formula of nourishing oils, proteins and vitamins which work to nourish follicles and condition hair. The Hyaluronic Acid in this serum is a vital natural element that locks in moisture. Apply nightly as directed to help protect the natural health and beauty of your lashes and brows. Hyaluronic Acid (HA) is a vital and natural element of healthy, vibrant skin. It is necessary to retain the skin's moisture and help maintain youthful looking skin. Keratinocyte Growth Factor (KGF™) is a special protein which is known to support healthy, vibrant hair follicles.