New iDiet OnDemand

It’s iDiet on Your Schedule

As Easy As:

1. Choose Your Meals

Lose weight hunger-free thanks to our unique and proven EasyPlans — customized to your goals — with full support, backed by science.

2. Eat Delicious Food

We know which foods keep you full while you reduce calories. Whether you’re a kitchen klutz or a cook, we have delicious options for you.


3. Lose Weight

With no need for willpower, and no suffering. iDiet’s science provides life-changing and permanent success.

What is iDiet OnDemand?

OnDemand is our newest and most convenient program. Until now, you’ve needed to attend live online groups to learn the iDiet hunger-free weight loss method. iDiet OnDemand packages the iDiet experience into convenient video lessons you can watch on your own schedule. Receive all the resources and knowledge you get with a regular iDiet group, but in a convenient self-paced recorded video program.

What Makes it Different?

iDiet OnDemand is designed for busy people who want to dive right in and get direct, immediate access. You can participate in this 10-week video program on your own schedule, and with as much or as little group sharing as you wish. Join in the forum discussions or just use our reference materials on your own. The choice is up to you!

Join iDiet OnDemand

Benefit from our newest, most time-flexible program. With full iDiet support. 

“Perhaps the most comprehensive approach to eating for effective weight control.”

— Jane E Brody, The New York Times

“I was never hungry and I never felt deprived while dieting. I find it to be freeing.”


“When I hit the 50lbs loss mark, I was very proud of my accomplishment.”


“The iDiet has been a life changing experience for me. The science makes sense. The recipes are fantastic. I went from being 312 lbs to 185 lbs in 24 weeks.”


“The program has completely changed my relationship with food. iDiet is science-based and aimed at helping control cravings. My cravings are reduced to nearly nothing. I have lost 15 pounds and feel much better, in control and healthier.”


“I am amazed by the iDiet. It surpassed my goals. I am happy to say I lost more weight than I originally planned.”


“To my surprise and utter delight, the weight began coming off immediately, and after the first two weeks of the program, I had lost 10 pounds!”


“The other programs that I have tried – WW in particular – did not give me the longer term skills that the iDiet gave me.”


“I don’t worry about my weight anymore. I now have the tools to maintain a healthy weight.”


“Before I knew it, after 20 weeks of the program I had lost 45 pounds and was eating healthier than I had ever before. The iDiet truly worked!”


“With the iDiet education I am now finally aware of what my body is doing when I see and smell food and how, not to fight nature, but to work with it and feed myself in a healthy purposeful manner.”


“I have tried many diets in the past but the iDiet just works.”


“The iDiet program has been the first diet on which I have lost weight. I lost 45 lb and I’ve referred at least 8 people to the program, all of whom have lost weight. The program is a life changer!”


“Almost three months now since starting the maintenance phase, I’m holding steady with my weight. Thank you Dr. Roberts and the iDiet!”


“After losing 40 pounds along side me while I was dieting, my husband just started in his own iDiet group to continue his weight loss. He also was amazed at how well the iDiet worked for him.”


What Do I Get?

With iDiet OnDemand, you’ll receive an extraordinary level of education and support. Our video lessons, easy food plans and helpful online support will help you achieve your weight loss goals and learn to avoid weight regain… once and for all. Our life-changing process is enhanced by our unique iDiet Meal EasyPlans as well as online tools like our Weight Tracker, iDiet Recipes and iPhone app.

You’ll receive:

  • On-Demand video lessons, to watch at your own pace, on your own schedule. We’ve captured everything good about our live group process in easy video lessons led by Dr Roberts and her team.
  • Advanced nutrition education
  • Easy Food plans and your choice of daily menus
  • Both no-cook meal suggestions and delicious, easy iDiet recipes
  • Meal options for everyone, whether you eat meat, are vegetarian, vegan or eat gluten-free
  • Online help overcoming plateaus and challenges
  • Support and guidance in exclusive online forums
  • Exclusive AI learning assistant — chat with our iDiet Knowledgebase
  • Online Tools: Weight Tracker, reference materials and bonus recipes
  • Daily Menu Plans
  • Mobile-friendly app-like website
  • Bonus holiday and entertaining recipes to lose weight while celebrating

iDiet iPhone AppGet our new app-like mobile-friendly website for learning on the go.  Log your progress, get support, learn anywhere.

Why Try the iDiet?

iDiet is the only weight loss program clinically proven to Retrain Your Brain™ to crave healthier foods, and also the only diet program ever proven to reduce hunger during weight loss (Batra et al 2013). iDieters are actually less hungry while losing weight than they were before. No other diet plan can say that.

You can lose weight without hunger or cravings, and maintain your new healthy weight without struggle. You’ll eat delicious real food, make better food choices, and feel in control.

iDiet’s science-based real-food meals keep you full and satisfied, which eliminates the need for willpower. You won’t have to fight your hunger, because you won’t be hungry. Our comprehensive education, habit change techniques, friendly group support, web site and app keep you motivated while you learn.

The iDiet Will Help You:

  • Finally achieve your weight loss goal and sustain it – for life!
  • Avoid plateaus and eliminate cravings
  • Stay on track even while socializing and traveling
  • Lower your cholesterol and improve your blood pressure numbers
  • Reduce your risk of Type 2 diabetes, sleep apnea, acid reflux and more
  • Reduce or eliminate your need for common daily medications
  • Feel more energetic and youthful — with the iDiet you can look good and feel good.

We’ll stand by you all the way as you Retrain Your Brain™ to change your relationship to food. We’ll help you lose weight and gain better health, vitality and an exciting instinctive control over food.

iDiet Delivers

While other diets overpromise, the iDiet is clinically proven to deliver an average weight loss of 25 pounds in 18 weeks. That’s 2 ½ times higher than other programs.

State-Of-The-Art Science

Incorporating the best nutrition, psychology and neurobiology findings, our groundbreaking meal plans address your basic hard-wired food instincts and help reprogram a lifetime of eating habits.

Stay Full

Our unique meal plans keep you feeling full and satisfied. You’ll be hunger-free while losing weight and enjoying foods you love.

Eat Delicious

iDieters rave about our fantastic no-cook meals and delicious yet easy recipes. You’ll enjoy a wide variety of mouth-watering foods, including old favorites such as chicken parm, burgers and chocolate desserts.

Sustain Your Results

We incorporate life-changing psychology and neurobiology for unprecedented success. You’ll develop natural control over food choices, reducing temptation, eliminating both cravings and emotional eating.


Watch videos on your own schedule, choose what you want to eat from the simple meal plans, enjoy, and repeat. Our powerful science and behavioral help are built into customized EasyPlan menus, plus simple effective strategies for every daily challenge.

As Seen In:

Two Convenient Options

Take prerecorded video classes (weekly), or attend live online group meetings (weekly).


Online Small Groups
  • Live Online Groups
  • Customized EasyPlan
  • Quick-Start Guide
  • Typical loss: 7% of starting weight
  • Convenient Online Groups
  • Online Tools and Resources
  • Weely Online Group Support
  • Best for: Live support
  • Live classes
  • Length: 10 weekly online meetings
  • Registration: Semester-based

Learn More About the iDiet

Meet Dr. Roberts

landing_meet dr robertsCreated by Susan Roberts, PhD, of Tufts University, the iDiet is based on advanced clinical research and helps dieters change their total approach to food, without hunger and without deprivation.
landing_book the i dietDr. Roberts, author of the groundbreaking book The “I” Diet and more than 200 clinical studies on nutrition and weight loss, decided she had to become a “diet doctor” because she had discovered the secret to lifelong weight loss…and lives transformed.
Dr. Roberts has collapsed her advanced nutrition science down into simple, doable, delicious menus. To succeed on the iDiet, all you have to do is follow the menus. And because Dr. Roberts worked as a chef before her career as a scientist, her iDiet recipes are delicious.

Discover Group-based Weight Loss That’s Hunger-Free and Works!

If you are tired of dieting and are looking for lasting change, join us. Once and for all, get power over food, lose more weight without hunger or giving up foods you love, and maintain your new healthy weight without struggle. Lose weight at the maximum healthy rate, and keep it off without effort. Make better food choices and crave healthier foods. iDiet doesn’t rely on willpower or deprivation, but rather on science-based real-food meals that keep you full and satisfied, coupled with comprehensive education for habit change, and friendly support to keep you motivated while you learn.

iDiet fMRI brain scans

fMRI scans actually show the reward centers of the brains of iDiet participants craving healthy foods over junk foods. (Deckersbach et al. Nutrition & Diabetes(2014) 4, e129)

Register for OnDemand Now

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