WHAT MAKES IWL DIFFERENT

Most people who come to IWL have already tried something else. They started strong, then slowly drifted, or the weight eventually comes back.

IWL is specifically designed through research, to address the root causes of weight regain.

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THE SCIENCE

Most diets fail for the same biological reason. These videos explain the science and why IWL is built around your metabolism, not against it.

1 min
Overview

The science behind your weight loss failures

The metabolic set point explained, and how IWL is built around it.

1 min
How it works

The 6 principles of Interval Weight Loss

Portion control, eating patterns, sleep, exercise, and why the order matters.

30 min
Deep Dive

Dr. Nick Fuller in conversation — the full IWL story

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

The Program

Month 1
Learn the IWL meal system and build your habit structure. No pressure to lose weight yet. The focus is on getting the foundations right.
Months 2–3
Gradually layer in exercise and sleep habits. Your first weight loss month begins. Progress is sustainable and deliberately paced.
Month 4 and beyond
Continue losing approximately 2kg every other month until you reach your goal weight. Results vary between individuals depending on starting point, health history, and other personal factors.

IWL is available as:

For most people we recommend starting with 12 weeks of dietitian-led IWL, giving you confidence you're doing it the right way the first time.

After that, most people transition to self-guided Essentials and continue independently. You can toggle between them at any time.

More details on both plans below →

Day to Day

Balanced eating
  • 3 full meals a day, two natural snacks
  • Weekly treats and takeout allowance
  • No calorie counting or scales
  • Estimate with fist-size portioning system
  • Unlimited fruits and vegetables
Simple weekly rhythm
  • One meal planning and grocery day per week
  • One weigh-in day
  • No rigid meal plans
  • Prepare food at home with IWL guidelines
  • Recipe library provided for ideas
Learning IWL — first month
  • Allocate approximately 30 minutes per evening
  • Reduces as habits become automatic
Exercise
  • Introduced in month two — not before
  • Structured and flexible — choose what you enjoy
  • Gradually built up, never all at once

Is it right for you?

IWL is a good fit if you
  • Have tried losing weight before and keep returning to the same point
  • Are done with restrictive approaches and want something that works with your life
  • Are ready to invest the time to learn a method properly — not just follow instructions
  • Can prepare food at home most of the time
  • Are willing to build a basic weekly rhythm — nothing rigid, but some structure to anchor to
  • Are looking for gradual, permanent change rather than fast results
IWL may not be the right fit if
  • ·You're looking for fast results — the method works gradually by design, and that is not a compromise, it is the point
  • ·Home-cooked meals aren't realistic in your current life — the program is built around real food prepared at home
  • ·You're not in a position to invest time upfront in learning the method — there is a learning curve in the first few weeks, and that effort is what makes the rest easier
  • ·Your life is currently in a period of significant instability — IWL can work around a busy life, but it needs enough of a baseline routine to build on
  • ·You prefer complete flexibility with no structure — the method uses light habits and routines as its foundation, and that structure is what makes it sustainable

Real Results

Members who'd tried Jenny Craig, Weight Watchers, keto, and fasting... and finally found something that worked.

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OUR PLANS

We recommend starting with 12 weeks of IWL Plus. This is enough time to install the habits properly and have the confidence you're doing it right from the start.

Recommended
IWL Plus
Dietitian Guided
Start your journey with confidence — guided by an accredited practising dietitian who knows your history and adjusts the programme to you.
  • A 60-minute initial consultation to meet your dietitian, and review your full history to build a plan around you
  • Weekly 30-minute check-ins to review your progress and adjust what's not working
  • Everything in Essentials
  • Recommended initial 12-week duration to help you learn the IWL program and install the habits into your life

Cancel or step down to Essentials anytime.

Claimable with all private health insurers on extras (see item codes).

IWL Essentials
Self Guided
Most people come here after completing their initial Plus period and feel ready to continue independently.
  • Full access to the IWL app — habit tracker, progress tracker, resource library
  • 8 learning modules covering the science behind the programme
  • Weekly Q&A thread in the member community, answered by dietitians
  • Toggle back to Plus at any time you need support

Cancel or upgrade anytime. No lock-in.

Claimable with most private health insurers (see item codes).

Ready to book your free consult?

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Common Questions

Answers to what usually comes up on the consult call so you can go in prepared, or skip straight to a plan.

If something comes up, let your dietitian know — they can often work around it or adjust the plan. If needed, you can pause and come back when the time is right.

There is almost always a reason we can trace back to. If you're on Essentials, reach out to community dietitian support and they'll help identify what's getting in the way. If you're on Plus, let your dietitian know and it will be escalated to Dr. Nick directly.  We'll work to resolve it — and if there's something outside our scope that requires specialist management, we'll refer you appropriately.

Yes. You can toggle between the two at any time. All your data and progress carries across.

You're assigned automatically when you start. If you have a specific request or would prefer a different dietitian, reach out to support and we'll arrange it.

Yes. Conditions like menopause, diabetes, and GLP-1 use are very common amongst our clients and our dietitians are experienced managing them.

For GLP-1 users specifically, IWL is very effective alongside it — the lifestyle and habit foundation it builds is what allows you to eventually come off it.

For significant medical conditions requiring specialist care, IWL can run alongside that support but should not replace it — this will be discussed on your discovery consult call.

IWL Plus is priced in line with standard private dietitian rates, with the option to pay weekly or upfront for the initial 12 weeks.  IWL Essentials is our more affordable self-guided option. Exact pricing will be confirmed on your discovery consult call.

Please find the full guide here → Health insurance guide.

IWL can be cancelled anytime — both Plus and Essentials. You'll retain access until the end of your current billing cycle. Cancel through the app, or email your dietitian or support if you need help.

IWL works best when you have a reasonably stable window ahead of you — at least one month, ideally three, with no major travel, events, or disruptions on the horizon.

Busy is fine. Managing work, caring for children or elderly parents, a full social calendar — these are all workable. Many people find the structure and routine of IWL actually helps organise life and reduce daily decision fatigue.

If life is in a period of genuine upheaval right now, it may be worth waiting for a clearer window. Starting at the right time gives you the best chance of making it stick.

Ready to take the next step?

Book a free discovery consult call with an IWL dietitian. They'll review your survey responses beforehand and come prepared to recommend the best way to start.

See available consult slots