Millions Trust and Use RapidHair, RapidLash and RapidBrow. Proven to regrow thinning hair for both men and woman, grow gorgeous lashes and a formula designed specifically for brows. The perfect combination! RapidLash is our first pick for a lash serum to ADD to your current Lash routine when in maintenance phase. Your lashes will love the nourishing ingredients, keeping your lashes healthy and thick even while in the resting phase.