Roxy Jacenko continued her rigorous health kick on Monday as she was spotted enjoying a green juice with friends in ritzy Double Bay, Sydney. 

The PR maven, 45, has revealed she is going to extreme methods to maintain her recent 15kg weight loss, including cutting back to just one meal per day. 

It seems she has used juice as one of the substitutes for a meal, as she was seen slurping one down while flashing her wealth in an all-designer ensemble.

The mother-of-two slipped her slimmed-down frame into a Prada hooded jacket and matching shorts as she strolled down the street with her gal pals.

She paired it with a basic white T-shirt and crisp Hermes sneakers plus a gold chain necklace with blue flowers to the look.

Roxy opted for minimal makeup during her day out and pulled her blonde tresses back into a half up-do. 

The PR queen revealed the extreme measures she goes to in order to maintain her goal weight of just 50.9kg. 

She told Daily Mail Australia she is doing daily contrast therapy, which involves taking baths in warm and cold water from Monday to Friday.

This method is believed to help to improve blood circulation throughout your body.

She also does 40 minutes in an infra-red sauna each day before completing a 45-minute workout on the treadmill at speed 6 and rolling hills, as well as low-weight exercises.

Roxy also revealed she eats just one meal a day at dinner which is focused on protein only.

'I don't do breakfast or lunch, instead I do dinner at 7pm each day which is focused on protein only and salad,' she explained.

'Last night I had grilled calamari, rocket pear and Parmesan salad. If I'm desperate for something sweet, I have dark chocolate-covered sultanas.'

Roxy also has an AG1 supplement, which includes multiple vitamins, minerals, probiotics and plant compounds, every morning.

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

Roxy also recently spoke about the terrifying moment she overdosed on Ozempic in an attempt to rapidly lose weight.

She took four times the recommended dosage, resulting in 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 on The Lazy CEO Podcast with Jane Lu.

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

Roxy said she is 'so sick of people' who deny using Ozempic, adding: 'I call a spade a spade on my platform and I don't care.'

She had consulted her doctor about it, and got a prescription, but ignored the guidelines when it came to safe dosage.

'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 then suffered from severe vomiting and non-stop 'epilepsy type' shaking which landed her in a drug overdose clinic for three days.

'I called an ambulance. An ambulance was going to be an hour away but I thought I was going to die. I went to St Vincent's,' she said.

Roxy has since put out a warning to all who are tempted to use Hollywood's latest quick-fix weight loss drug.

Ozempic has been a hot topic in Hollywood, with stars either admitting to using the diabetes drug for weight loss or staunchly denying it.

Semaglutide is sold under the brand names Ozempic and Rybelsus as an antidiabetic medication used for the treatment of type 2 diabetes.

It is also sold under the brand name Wegovy as an anti-obesity medication for long-term weight management.

The drugs act like a hormone in the brain which slows the clearing of food from the stomach into the intestine, which makes people feel full for longer and spurs weight loss.

Ozempic and Wegovy have surged in popularity since becoming the first drugs proven to aid weight loss.