Experts and hairstylists have reported a noticeable increase in temporary hair loss among users of weight-loss medications such as Ozempic and other GLP-1 drugs. This side effect, known as telogen effluvium, is attributed to the body’s stress response to rapid weight loss. According to Dr. Philip Rabito, an endocrinologist in New York City, the body may interpret dramatic weight loss as a form of starvation, triggering temporary hair loss that typically regrows once weight loss stabilizes.
Hairstylists such as Ashley DiMatteo and Briana Delvecchio, both affiliated with Ashley Lauren Beauty Lounge in Westchester, New York, have observed a steady rise in clients coming in reporting thinning or shedding hair while on weight-loss medications. DiMatteo noted that this can range from gradual to sudden, and from thinning out to complete loss. Delvecchio, who herself takes a GLP-1 drug, pointed to factors like new medications, vitamin deficiencies, and weight loss as potential causes of hair changes.
Becky Watt, a veteran hairstylist from Ohio with over two decades of experience, echoed these observations, noting thinning and shedding in her clients who are taking weight-loss drugs. Watt emphasized that while some clients do not experience hair loss, repetitive weight loss and underlying issues like thyroid problems or micronutrient deficiencies—especially in iron, B12, or vitamin D—can exacerbate the condition. Medical professionals recommend working with a healthcare provider to manage these nutrient levels effectively.
Dr. Rabito explained that hair loss following weight loss is often associated with traditional bariatric surgery, which results in the loss of 70% of excess body weight within six months. This type of procedure typically leads to hair loss within six to nine months, as the body may perceive the rapid weight loss as a form of starvation. He stressed that the speed of weight loss correlates with the severity of hair loss, and that it is primarily a response to severe physical stress.
Hairstylists also advised their clients to consult with a physician before undergoing any hair treatments, emphasizing the importance of checking for micronutrient deficiencies and balancing vitamins. DiMatteo and Delvecchio recommended adjusting hair care routines, such as using gentler shampoos, reducing heat treatments, and avoiding harsh chemical processes like coloring or lightening. They also suggested scalp stimulation and rinsing with cool water to support hair health during the recovery phase.
Novo Nordisk, the manufacturer of Ozempic and Wegovy, confirmed that hair loss is an identified risk associated with semaglutide. The company noted that in clinical trials of Wegovy, hair loss was reported in 2.5% of treated patients compared to 1.0% in those receiving a placebo. The company emphasized that patient safety is a priority and that they continue to monitor the safety profile of their products, including providing adequate information on side effects like hair loss.
Experts underscore the importance of a balanced approach to weight loss, ensuring that clients receive proper medical guidance and nutritional support. While the hair loss is temporary, patients are encouraged to monitor their vitamin levels, maintain a stable weight, and follow recommended hair care practices to support regrowth. According to Dr. Rabito, as long as the body is no longer in a state of starvation and nutrient levels are adequately balanced, hair regrowth is expected over time.