Over the past few years, we’ve documented a spike in telogen effluvium, a temporary shedding triggered by illness, stress, or hormonal changes. Normally, about 10% of hairs are in the shedding phase — with telogen effluvium, that can jump to 30–40%.⁠ ⁠ Common triggers include COVID, emotional stress, poor sleep, coming off birth control, and nutrient deficiencies like low iron or vitamin D. Even weight loss medications like Ozempic can trigger shedding (linking our GLP-1 video in the caption).⁠