Married At First Sight alum Katie Johnson has opened up about Mounjarro use and the little-known dangers that come with taking it regularly.

The reality TV star, 37, took to Instagram on Monday to defend her use of weight-loss drugs while also issuing a chilling ‘warning’ about their effects.

‘I have to issue a major warning. If you are on GLP1 or if you know of anyone who is on GLP1, please send them this message,’ she began.

GLP1 receptor agonists are used to target a naturally occurring hormone in the body that helps regulate blood sugar levels, appetite and digestion, and is an umbrella term that encompasses popular weight loss drugs such as Mounjaro and Ozempic.

‘I’ve been learning so much about the GLP1 medication and it works. It does the job. You lose your appetite,’ she told the camera.

Married At First Sight alum Katie Johnson is opening up about Mounjarro use and the little-known dangers that come with taking it regularly

‘But what I didn’t realise and what I didn’t fully understand is that people are so unaware – through no fault of their own – that you are sending yourself into malnutrition,’ she said.

‘Not only will your body look for energy and eat away your muscles, but also your vitamins and your minerals that you get from nutrition are rapidly depleting. And people wonder why they’ve got symptoms.

‘I am pro GLP1 if it’s done right.’

In the past, Katie has been transparent of her use of weight loss drugs.

In May, she exclusively told Daily Mail Australia she initially tried Mounjaro in an effort to lose weight, but struggled with harsh symptoms, including fatigue and sickness.

Mounjaro, also known as tirzepatide, is often used for type 2 diabetes and also causes weight loss – much like Ozempic, which is also known as semaglutide.

‘I didn’t feel alive. I was shrinking physically, but I had no energy – no spark,’ she said.

She then resumed using Mounjaro, but this time she took it with a supplement which she says helped with side effects.

In May, Katie exclusively told Daily Mail Australia that she initially tried Mounjaro, but struggled with fatigue and sickness

‘It changed everything,’ Katie said.

‘I felt energised, excited to work out, and like I was finally living again.’

The former MAFS bride revealed she has already dropped a dress size – and has two more to go until she hits her target.

‘I’m not chasing a number. I’m chasing a feeling – health, strength, and pride in how far I’ve come.’