https://nymag.com/strategist/article/how-to-treat-glp-1-related-hair-loss.html
”There isn’t currently any data to suggest that the hair loss is directly caused by the medication itself. Rather, the medication causes significant and rapid weight loss, which in turn triggers something called telogen effluvium, or TE. “Telogen effluvium is a diffuse shedding that happens when a stressor pushes hair follicles from their active growth phase (anagen) into their resting phase (telogen),” explains Dr. Ashley Magovernboard-certified dermatologist and Dermstore Medical Advisory Board member. When the body is under stress, it will prioritize vital functions, adds Dr. Dendy Engelman, board-certified cosmetic dermatologist at Shafer Clinic NYC. And unfortunately, hair growth is decidedly not in that category.
This type of stress-related shedding is the same kind of hair loss that can also happen during illness, childbirth, or major surgery, explains Dr. Connie Yang, board-certified dermatologist and Dermstore Medical Advisory Board member. “Normally, only about 5 to 10 percent of scalp hairs are in telogen at any given time, so you barely notice their daily shedding,” says Magovern. “In telogen effluvium, that balance shifts dramatically. A much larger proportion of hairs prematurely enter telogen at once, which is why people see sudden, heavy shedding a few months after a trigger” — in this case, weight loss and the associated nutrient deficiencies, hormonal fluctuations, and metabolic changes that often accompany it.”