Weight loss jabs have taken England by storm. From GP waiting rooms to office conversations, GLP-1 drugs like Ozempic and Wegovy are everywhere. But with that popularity comes a flood of myths, horror stories, and half-truths. So what does the science actually say?
Let’s start with one of the biggest misconceptions doing the rounds: that these drugs completely kill your appetite. That’s false, according to Dr Federica Amati, nutrition lead at Imperial College School of Medicine. ‘The medicine is about 1,000 times stronger than what we naturally produce from our gut,’ she explains, ‘but it doesn’t completely suppress hunger. It’s powerful, but you will eventually get hungry.’
To understand why, it helps to know what these drugs are actually doing inside your body. GLP-1 medications mimic a hormone called Glucagon-like peptide-1, which your gut naturally produces when you eat. Normally, this hormone is released in short bursts as food passes through the digestive system, triggering feelings of fullness. Those bursts last just a few minutes. Amati describes it as being like a sparkler. The drugs, by contrast, are more like a bonfire that keeps roaring for a week. Because the hormone stays active in your system for much longer, you feel fuller faster and eat less overall. But the hunger doesn’t disappear entirely.
So what about the other claims swirling around? ‘Ozempic face’ is one that keeps coming up on social media, with users worrying that rapid weight loss leaves their face looking gaunt or saggy. There is some truth here, but it is not unique to these drugs. Significant weight loss of any kind can change the way your face looks, simply because fat is lost across the whole body, including the face. It is not a chemical side effect of the jab itself.
Hair loss is another side effect that has been widely reported by users in England and beyond. This one is real, though again it is linked to rapid weight loss rather than anything specific to the drug. When the body goes through sudden physical changes or calorie restriction, it can trigger a condition called telogen effluvium, where hair sheds more than usual. For most people, this is temporary.
Then there is the question of what happens when you stop taking the jabs. This is where things get a bit uncomfortable for the manufacturers. Evidence consistently shows that a significant proportion of people regain much of the weight they lost once they come off the medication. The drugs work while you are on them, but they do not rewire your metabolism permanently. That has led to serious questions in England about whether the NHS can sustain long-term prescriptions for large numbers of patients, and whether people are being given enough support around diet and lifestyle changes to maintain results.
On the more positive side, there is growing evidence that GLP-1 drugs do more than just help people lose weight. Research has pointed to potential benefits for heart health, with some studies suggesting reduced risk of cardiovascular events in people with obesity or type 2 diabetes. There is also emerging interest in whether these drugs could help with addiction behaviours, including alcohol consumption, though the evidence there is still early.
Mental health is another area where anecdotal reports have been striking. Some users have described feeling less consumed by thoughts about food, sometimes referred to as ‘food noise’, and report improvements in mood and overall wellbeing. Researchers are taking this seriously, though experts are cautious about drawing firm conclusions yet.
As for ‘Ozempic breath’, a term that has been floating around online, some users do report changes in their breath while on the medication. This is likely connected to changes in diet and digestion rather than the drug itself causing any distinct chemical reaction in the mouth.
The bigger picture in England is one of genuine medical potential mixed with a lot of noise. These drugs are not a magic fix, and they are not without side effects. Nausea, vomiting, and digestive discomfort are common, particularly in the early weeks. They are also expensive, and access through the NHS remains limited, pushing many people towards private prescriptions and online pharmacies where oversight can be patchy.
Health officials and doctors across England are urging people to approach these medications with realistic expectations. They can be a genuinely useful tool for people struggling with obesity, particularly where other methods have not worked. But they work best as part of a broader approach that includes changes to diet and physical activity, not as a standalone solution.
The science is still catching up with the hype. For now, the honest answer to most questions about these drugs is: it’s complicated.