Roxy Jacenko has revealed she has reached her ideal goal weight, but the experts don't agree.

The PR maven, 44, took to her Instagram story earlier this week to share a photo that showed her flaunting super slim and ripped frame in one of her trademark mirror selfie.

Captioning the image, Roxy said she had finally reached her goal weight after 12 months.

'12 months on and my goal weight achieved. 48kg,' she wrote.

However, according to the Heart Foundation's Body Mass Index (BMI) calculator Roxy is underweight for her height.

BMI is calculated by dividing weight by height squared.

According to the Department of Health And Ageing, a BMI of between 18.5 and 24.9 is considered healthy. 

Roxy's goal weight puts her BMI at just 17.

Speaking to Daily Mail Australia, Roxy said she had never paid too much attention to BMI.

'I don’t know about BMI and I’ve never been one to worry about what I should be,' she said. 

'Personally or professionally, most important for me is to feel well, healthy and energised and fit clothes without feeling like the buttons are going to pop off.

'If that means I am under what the "guidelines" suggest, I am good with that.'

Back in April 2024, Roxy revealed she had reached her then goal weight of 50.5 kilograms.

In November, Roxy admitted she had gained 18kg after moving to Singapore in 2023 with her husband Oliver Curtis and their two children.

She said on The Lazy CEO Podcast with Jane Lu she stacked on the kilos after relocating because of her lifestyle changes. 

Roxy explained she spent most of her time eating, drinking and going shopping and this led to the weight gain.

'Housewifery was not for me. I just shopped and shopped. It was the most boring existence,' Roxy, who announced her return to PR in September, said.

'I consumed 18kgs of alcohol in a year and realised this is not for me so I got back to work.'

She also discussed the terrifying moment she overdosed on Ozempic in an effort to lose weight.

Roxy said she'd taken four times the recommended dosage before she suffered from severe vomiting and non-stop shaking.

'I put so much weight on. I would have to undo my jeans when I sat in the car so I got sucked in by it,' she explained.

'I bought it, I tried it. I took four times the amount in the first go.' 

She said she thought she was going to 'die' after taking one milligram, which was four times the amount prescribed to her by a doctor.

'I thought I was actually going to die. I have had cancer, radiation therapy, all of that. It doesn't even compare to how bad I felt when I took this drug,' she told The Saturday Telegraph.

'For the first 12 hours I was OK. I vomited four times that morning, once in a hire car, and I went to work.'

Roxy told Daily Mail Australia she maintained her weight loss by doing daily contrast therapy, which involves taking baths in warm and cold water.

She also revealed she eats one meal a day and has a AG1 supplement every morning.

Roxy also completes a 45-minute workout on the treadmill per day at speed six and rolling hills and also does low weight exercises.

She said she only drinks alcohol on the weekend if she has an occasion and limits herself to two drinks.