Dr Amir Khan has explained why people taking weight loss medications such as Mounjaro, Ozempic, or Wegovy may experience hair loss, and he has outlined five simple ways to help minimise the issue.
What Causes Hair Loss on Weight Loss Jabs?
According to Dr Khan, the hair loss is not directly caused by the injections themselves but by a condition called telogen effluvium. This occurs when the body shifts hair into the shedding phase due to stress from rapid weight loss. He identified three main triggers: cutting calories too drastically, not getting enough protein, and deficiencies in iron or vitamins.
Dr Khan explained: “You've suddenly cut your calories and your body thinks ‘Uh oh, I'm in starvation mode’, so it prioritises essential organs, not your hair. You may not be getting enough protein – that's the second reason. Hair is made of keratin, that's a protein. So, if you're not eating at least 60 to 80 grams of protein a day, your hair follicles literally slow production and your nutrition may dip. Things like iron, vitamin D, B12, and zinc often drop when people eat less.”
How to Protect Your Hair While Losing Weight
Dr Khan listed five ways to protect your hair while using weight loss medications:
- Don't crash diet – aim for steady weight loss and include nutrient-dense whole foods.
- Hit your protein target – a minimum of one gram per kilo of your body weight, or more if strength training.
- Nutrient support – consider extra iron, vitamin C, vitamin D, zinc, and vitamin B12.
- Gentle brushing – avoid tight hairstyles and harsh treatments while hair is vulnerable.
- Give it time – once your body adjusts, hair will recover.
Dr Khan added: “Once your body adjusts, your hair will recover. So if you notice some shedding, don't blame the injections, blame the metabolic shock that comes with using them. Support your body properly, ride it out, and your hair will come back.”
Background on GLP-1 Inhibitors
GLP-1 (glucagon-like peptide-1) is a naturally occurring gut hormone that controls blood sugar levels and appetite. The use of GLP-1 inhibitors, or receptor agonists, has soared in popularity due to their effectiveness in managing blood sugar in diabetic patients and aiding weight loss. Available in injectable and pill forms, some can be prescribed via the NHS to eligible patients. However, as with all medicines, they can cause side effects.
Dr Khan's advice comes as a reassuring message for those experiencing hair loss while on these medications, emphasising that the condition is temporary and manageable with proper dietary and lifestyle adjustments.
