Lose the weight and
keep it off for good.

A long-term, sustainable approach to weight loss — developed by Dr Nick Fuller, obesity researcher at the University of Sydney.

See if IWL is right for you

Featured in 1,000+ International Media Stories

ON THE MEDIA

Dr Nick Fuller explains Interval Weight Loss

As one of the country's leading obesity experts, Dr Nick is the voice the media turns to on weight loss, cutting through the fad-diet noise with what the science actually says.

1 min

7-News

The evidence: why 95% of diets fail — and what works instead

A 25-year study of 4,000 twins, the biology behind weight regain, and one member's story of losing 8kg and keeping it off.

7 min

Sunrise

Crash diets, Ozempic, and what actually keeps weight off

Dr Nick on why decades of dieting have only made things worse, where the new weight-loss drugs really fit, and the approach that lasts.

30 min

Dr. Nick in conversation

What is Interval Weight Loss?

A detailed walkthrough of the research, how alternating months work, and what to expect in your first 90 days. Worth watching if you want to go in fully informed.

Optional — 30 mins

See if IWL is right for you

Backed by Health & Government Partners

Dr. Nick Fuller’s research, delivered as a step-by-step program

Independently validated and ranked #1 for sustainable weight loss in Australia by a study from University of Wollongong. [1]

Approved and backed by Australia’s major health institutes and health insurers.

See if IWL is right for you

Dr. Nick Fuller

Leading Obesity and Metabolic Health Expert, 4x Best Selling Author

Losing weight is hard,
keeping it off is harder

IWL is built from over a decade of clinical research and real-world testing to stop the
cycle of losing and regaining weight.

Work with your biology, not against it

Alternate between weight-loss and maintenance months, so your body adapts instead of rebounding.

Gradually implement habits one at a time

Learn small, sustainable changes one at a time so nothing feels overwhelming.

No rigid meal plans or calorie counting

You’ll adapt the method to your lifestyle, not the other way around.

Slow but sustainable for life

No crash diets or restrictions. Progress is steady, safe, and designed to last.

See if IWL is right for you

For those who just
wanted something that lasts

"It was time to find a program based on science and common sense... My life has changed in so many ways. I am the happiest and healthiest I have ever been in my life."

Sharon Contin

“A very smart and understanding approach to losing weight. No crazy meal plans, no restricted foods, just sensible guidelines.”

Chris

“This plan is about learning how to eat regular nutritious foods... there is no diet! It is not a quick fix... I feel really good, I enjoy hiking more now that hills are easier!”

Bet Reichstein

Recognised by private health insurers and Medicare for eligible rebates