The mantra Tziporah Malkah uses to avoid unhealthy habits

Tziporah Malkah feels "absolutely amazing" since losing 50kg.

The 45-year-old -- who currently weighs 70kg -- sat down exclusively with A Current Affair on Tuesday to talk about her weight loss journey.

"From a size 24 to a 12, I'm half of what I used to be," she told reporter Brady Halls. "I feel amazing ... I feel absolutely amazing."

In the '90s, Malkah -- then known as Kate Fischer -- was a model, actress, socialite and the fiancée of billionaire James Packer. Then she seemingly disappeared.

"Instead of rich famous and beautiful, I was poor, hiding away and morbidly obese," she said. "I had lap-band surgery and I had it removed because it didn't work for me."

When she appeared on I'm a Celebrity... Get Me Out of Here! in 2017, Malkah weighed 118kg. She lost 12kg during filming, and even more since then thanks to a number of lifestyle changes, including personal training.

Malkah said she also turned to hypnotist Mark Stephens for help, and together they identified she was using food as an emotional crutch.

He taught her a mantra that she uses when she goes through aisles of unhealthy food in a supermarket: "I don't need it, I don't want it, I won't have it."

Malkah said she now weighs what she did when she was modelling, and wouldn't say no to returning to her old career one day.

For more information on Mark's hypnosis and retreats, visit the A Current Affair website.