Some women are continuing to use popular weight-loss medications like Mounjaro, even after experiencing significant and embarrassing hair loss, a side effect listed by manufacturers but often overlooked in the pursuit of dramatic weight reduction.
Nicola Palfreyman, 41, from Oxfordshire, lost 8st (approximately 112 pounds) on Mounjaro, transforming her size 24 clothes to a size 14. While delighted with her weight loss and improved general health, the mother of four found her once-lush blonde hair had become thin and sparse. She now uses volumizing products and has switched to a darker hair color due to the bleaching process being too harsh for her thinning strands. Palfreyman estimates it will take another year for her hair to fully recover but does not regret her decision to use the medication.
Hair loss is a known potential side effect of GLP-1 medications such as Mounjaro and Wegovy. While official advice suggests it may be linked to rapid weight loss or nutrient deficiencies, a recent study from US researchers indicates a more direct link. The study suggests that GLP-1s can increase the risk of hair loss by 37 to 68 percent, implying a greater than 50 percent chance of experiencing this side effect.
Louise Atkinson, another user, described experiencing significant hair loss six months after starting Mounjaro, losing fistfuls of hair over a nightmarish six-week period. She found herself focusing on her receding hairline and visible scalp instead of her slimmed-down figure. Support groups for these medications often feature women discussing hair loss and trying various supplements and treatments like biotin, pumpkin seed oil, and collagen, often with little success.
Atkinson spent considerable money on treatments, including a £345 consultation with a trichologist at Philip Kingsley in London. The expert explained her condition as telogen effluvium, where an interruption in the hair's growth cycle causes a large amount of hair to shed simultaneously. The trichologist reassured her that new hair growth was already occurring, a sentiment echoed by Palfreyman's hairdresser who noted new baby hairs emerging all over her scalp.
Despite the distress, many users, like Palfreyman, remain committed to the medication. Palfreyman continued her Mounjaro doses, gradually increasing to 10mg before her hair loss began. She found that a lower maintenance dose of 2.5mg, taken on and off since prices increased, allowed her appetite to be controlled and hair to regrow.
Understanding the Mechanism
Experts suggest that rapid weight loss, in general, can shock the body, putting hair follicles into a 'disaster mode'. However, with the increasing popularity of GLP-1s, excessive shedding is being reported even with steady, slow weight loss and balanced diets. Susie Aikin-Sneath, a trichologist, explains that reduced calorie intake makes it difficult to obtain essential nutrients for hair growth, as the body prioritizes essential functions. She also suggests that the medication itself might act as a physiological stressor on the body.
US researchers speculate that caloric restriction contributes to micronutrient deficiencies and physiological stress, disrupting the hair growth cycle. They also point to other potential factors, including metabolic changes, altered hormone levels, and impacts on the immune system, which could affect hair growth processes.
Adrian Heald, professor of medicine, acknowledges that while a clear biological pathway is not yet established, there may be unknown factors at play.
Strategies for Management
Helen Bligh, 60, a former dietitian and now a GLP-1 coach, also experienced significant hair thinning on Mounjaro after losing 3.5st (approximately 49 pounds) in seven months. She found that her reduced food intake, due to strong appetite suppression, led to her body going into 'shock.' Bligh emphasizes the importance of good nutrition, recommending keeping GLP-1 doses low enough to allow for healthy eating. She advises eating smaller, more frequent meals and ensuring each calorie is nutrient-dense, with a focus on protein (1.2-1.6g per kg of target body weight), iron, zinc, vitamin B12, and vitamin D. Incorporating probiotic and prebiotic foods is also suggested.
Experts generally agree that reducing GLP-1 dosage or taking a break from the medication can help hair shedding. Discussing blood tests for iron stores, B12, and vitamin D with a GP is also recommended for targeted supplementation. Aikin-Sneath advises aiming for 'optimal' rather than just 'normal' levels for these nutrients to support hair health.
Despite her hair concerns, Bligh remains on Mounjaro for its significant health benefits, maintaining a low dose to manage her weight and blood pressure. Similarly, Atkinson plans to continue using GLP-1s, finding her hair has regrown significantly, albeit in a shorter style. Both women express that the health improvements outweigh the temporary distress of hair loss, with Palfreyman stating she would undergo the experience again to achieve a healthier weight and avert serious health risks.