Hair loss affects millions of people worldwide. Although treatments do exist, these solutions are costly and not always effective. Looking for a more lasting and effective solution, scientists have turned their attention to understanding the molecular mechanisms that regulate hair growth, leading to a new frontier in hair regeneration: dermal exosomes. When people go bald, hair follicles (the tube-like pores that surround the root and strand of a hair) don’t disappear, they shrink. Herein lies the key to a long-lasting treatment for hair loss. The hair follicle cycle is divided into three dist…