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Hollywood is obsessed with protein diets and now an Australian biochemist believes he has fine tuned the science with his own weight-loss formula.

Dr Robert Buist developed IsoWhey, believing there is a need for a meal replacement product containing high quality protein that can be quickly absorbed.

"As you know, if you eat chicken or fish or steak you're going to get these big chunks of meat sitting in the stomach, it's hard to digest," he said.

"If you've actually got the IsoWhey protein it dissolved 100 per cent in water and it does so in very quick period of time."

The whey protein in the powder is the key ingredient, according to Dr Buist.

He said many diets may cause people to lose weight on the scales but they are often losing muscle tissue and that is needed to burn fat.

The idea is this, you replace one-to-two meals a day with a shake or protein bar, along with a healthy diet plan minimising carbohydrates.

Exercise is encouraged but you can do without it.

Margot Brunswick has tried it all, including undergoing stomach stapling surgery.

None of it worked and she ballooned to 184kg.

Margot replaced two meals with a shake, spent no time at the gym and lost 62 kilos over a year.

"To be able to get into a size 18 and get into it and not have a corset on makes me feel like a part of the regular human race," she said.

"I am on the fat end but I am not in gigantor-land anymore."

Mother-of-three Kerryn Hoffman had always been slim but snacking with the kids and lack of sleep contributed to an extra 20kg.

She lost 10kg in the first five weeks.

"I wasn't doing any extra exercise, I was losing two kilos a week and I was really only doing the same pump class I had been doing for years, once a week," she said.

Exercise physiologist Dr Jarrod Meerkin admits he was sceptical of IsoWhey at first, but did his own research and now believes it could be useful for anyone who needs a kick-start.

"If there is someone out there morbidly obese or overweight, this product may be a way to help them get underway their weight loss journey," he said.

Visit or phone 13 23 10.

Dr Jarrod Meerkin's website is .

The following SA stores are stockist for IsoWhey:

Foods For Life
15 Rundle Mall
(08) 8410 1788

A Life Abundant
587 Magill Road
(08) 8333 3144

Blackwood - Healthy Life
248 Main Rd
(08) 8278 5226

Also available at all National Pharmacies and selected health food stores.