MARRIED At First Sight UK star Thomas Hartley has told of how he couldn’t speak after taking Mounjaro.
Opening up about his experiences with Mounjaro, and an alternative fat jab he is currently using, the 35-year-old reality star got candid on his Instagram page on Monday.
Thomas Hartley looks so different from his 2022 MAFS UK stintCredit: Instagram/@thomashartleyofficial
He has been using weight loss injectionsCredit: Instagram/@thomashartleyofficial
He looked so different while appearing on the E4 showCredit: E4
In May 2025, he showed off his initial weight loss – but now looks even more slenderCredit: Instagram
Doing a Q&A on his stories about an alternative weight loss drug, Thomas encouraged his fans to ask him questions.
The first question he answered was: “Have you suffered nausea and vomiting?”
Thomas replied: “Absolutely not at all, I did with OZ.”
The next question was: “Did you try Mounj before this?” to which he replied: “Yes I did, I lost my voice and it really just didn’t feel nice for me.”
Thomas then revealed he has not experienced any side effects from the alternative he is using, but warned “everyone’s different”.
Someone then asked if the new drug he is using to shed weight is “a lot stronger than Mounjaro” to which he replied: “MJ made me sick.
“This doesn’t. It’s just made me slim with lean muscle.”
Thomas looks incredibly different from his stint on Married At First Sight UK four years ago.
Last May, he could be seen showing off his impressive six pack in a photo on social media.
In the new snap, the reality star looked at the camera while holding his black top up to display his torso.
He made a peace sign with his other hand and then shared another throwback photo alongside it.
In the throwback, Thomas can be seen in a pink top and cap doing a peace sign.
The MAFS star captioned his post: “No caption needed #healthy #sobriety #wellbeing.”
While on the show, Thomas married moments after meeting him – but their union ended badly.
Everything you need to know about fat jabs
Weight loss jabs are all the rage as studies and patient stories reveal they help people shed flab at almost unbelievable rates, as well as appearing to reduce the risk of serious diseases.
Wegovy – a modified version of type 2 diabetes drug Ozempic – and Mounjaro are the leading weight loss injections used in the UK.
Wegovy, real name semaglutide, has been used on the NHS for years while Mounjaro (tirzepatide) is a newer and more powerful addition to the market.
Mounjaro accounts for most private prescriptions for weight loss.
How do they work?
The jabs work by suppressing your appetite, making you eat less so your body burns fat for energy instead and you lose weight.
They do this my mimicking a hormone called GLP-1, which signals to the brain when the stomach is full, so the drugs are officially called GLP-1 receptor agonists.
They slow down digestion and increase insulin production, lowering blood sugar, which is why they were first developed to treat type 2 diabetes in which patients’ sugar levels are too high.
Can I get them?
NHS prescriptions of Wegovy is controlled through specialist weight loss clinics, while Mounjaro is available from GPs but only for the highest risk patients.
For Wegovy, a patient will typically have to have a body mass index (BMI) of 30 or higher, classifying them as medically obese, and also have a weight-related health condition such as high blood pressure. They will be expected to have tried diet and exercise already.
Mounjaro is available from NHS GPs for weight loss but only to a tiny group of patients, with the rollout starting with those with a BMI higher than 40 and with four weight-related health conditions.
Private prescribers offer the jabs, most commonly Mounjaro, to anyone who is obese (BMI of 30+) or overweight (BMI 25-30) with a weight-related health risk.
Private pharmacies have been rapped for handing them out too easily and video calls or face-to-face appointments are now mandatory to check a patient is being truthful about their size and health.
Are there any risks?
Yes – side effects are common but most are relatively mild.
Around half of people taking the drug experience gut issues, including sickness, bloating, acid reflux, constipation and diarrhoea.
Dr Sarah Jarvis, GP and clinical consultant at patient.info, said: “One of the more uncommon side effects is severe acute pancreatitis, which is extremely painful and happens to one in 500 people.”
Other uncommon side effects include altered taste, kidney problems, allergic reactions, gallbladder problems and hypoglycemia.
Evidence has so far been inconclusive about whether the injections are damaging to patients’ mental health.
In April 2024, Thomas who has been open about his mental health, said his
He explained at the time: “I’ve secretly drank and used in lots of situations, sometimes from morning until night and it is only when I’ve been completely obliterated or out of it that anyone would have even noticed.
“I could sink a lot of drinks in a very short time and still appear completely sober, sneak off and use and come back.”
Thomas struggled with an addiction to alcohol and drugs following his departure from .
Fans are impressed with Thomas’ new lookCredit: Instagram/@thomashartleyofficial
Eze Chidiebere Paul
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