Yes. A pilot study conducted at the Department of Dermatology and Venereology, DOH-Tondo Medical Center, followed test subjects using HairReve Hair Rescue Thickening Serum once daily for 16 weeks. Researchers recorded a 15-18% improvement in hair density, an increase of 10-15 hairs per square centimeter, and a 65% improvement on the Physician's Global Assessment scale as rated by three blinded dermatologists.