- $499 for Three Micro-Needling Hair Restoration Sessions ($1,185 value)
Hair Growth: It’s Just a Phase
Hair growth patterns change across our bodies, throughout our lives, and from species to species. Check out Groupon’s guide to explore the science behind the strands.
Hair varies in thickness and length across our body, from the head’s massive jungle to the knuckles’ tiny brambles. But regardless of where it is, each strand of hair cycles through three phases: anagen, also known as the active growth phase; catagen, or transitional phase; and telogen, or resting phase. During the growth phase, a new hair shaft sprouts from a follicle as its cells rapidly divide and grow upward, forming tightly packed bundles rich with keratin protein. Next, the transition phase kicks in for about two to three weeks, during which growth stops and the outer root sheath shrinks, anchoring the hair to the follicle as it enters the final phase. At that point, the follicle lies dormant until the hair is shed and the cycle begins again.