The iDiet Review

by The Diet Critic on August 20, 2020

i diet reviews
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The iDiet, previously called The Instinct Diet or “i Diet”, is a weight management program created by Dr. Susan Roberts. The iDiet is marketed as a “transformational, easy-to-follow program for healthy, hunger-free and long-term weight loss. It was originally published as a book, but has since become a web-based program that includes an official site that provides information about the program, the science behind it, info about foods to eat and a blog filled with advice, tips and guidance.

The iDiet is reportedly based on over 20 years of research and clinical trials and its purpose is to help to “retrain your brain” for healthier eating and effortless weight loss through the formation of new food habits and new healthier cravings.  Those who wish to follow an iDiet program are assigned to an iDiet-trained Group Leader.

The diet was developed by renowned scientist Susan Roberts, PhD, who is a Professor of Nutrition at Tufts University and Professor of Psychiatry and Scientific Staff Member in Pediatrics at Tufts Medical Center. Her primary focus is on the neurobiology of eating to make weight loss “instinctive.” The iDiet is based on her life’s work and has garnered respect from other weight loss experts and health care professionals.

Potential Benefits

There are a number of advantages that proponents of the iDiet claim it provides, such as:

  • Long-term weight control
  • Enhanced energy levels
  • Reversal of metabolic syndrome
  • Lower blood pressure
  • Reduced cholesterol levels
  • Decrease in aches and pains
  • Improved blood sugar levels
  • Prevention of Type 2 diabetes or helping to treat the disease

Additionally, those who effectively follow this program can lose 25 pounds over 24 weeks.

A Three-Phased Diet

The iDiet is separated into three phases.

  • Phase 1 – An introduction to the iDiet way of eating. This is a minimum of 2 weeks but can last for as long as the dieter wants to build new healthy habits.
  • Phase 2 – Ongoing education and support to help the dieter set their new lifestyle as a solid routine. During this phase additional healthy meal options are introduced.
  • Phase 3 – This is the maintenance phase and begins only once you’ve reached your weight loss goal. In phase 3, you monitor your weight and can enjoy any of the iDiet recipes and can also eat out and even enjoy sensible amounts of wine and cocktails. The goal is to promote sustained weight loss, whether you’re going about your daily life or are on holidays.

On this diet you will consume three meals a day (breakfast, lunch and dinner) and 2 snacks a day. The menu plan is designed to provide ideal body fat loss and reduction of hunger.

The iDiet Pros

  • Control over the design and goal of your diet – With the help of a group leader, you design your diet and decide when it is time to move on to the next phases. You also create your own menu plan from the recipe options available.
  • Realistic weight loss plan with no gimmicks – The aim is to lose 25 pounds in 24 weeks, which is safe and achievable for most adults.

The iDiet Cons

  • No free option – To follow this diet, you will need to pay for an OnDemand program or a Live Online Group program.
  • Limited recipes – While there are over 120 different recipes to build your menu plan, over time, eating the same recipes could become tiresome for certain people.
  • No focus on activity – The iDiet’s primary focus is on what you consume and building healthy eating habits, which is vital for weight loss. That said, it does not acknowledge the importance of a proper activity level as an essential part of healthy weight management and healthy living. Research has found that physical activity helps to prevent weight gain when previously overweight.

Finally, even though the iDiet seems to be a relatively decent weight loss program, due to the fact that it will require a lifestyle change, and one without recommended exercises, talk to your doctor first before you consider taking part.

{ 4 comments… read them below or add one }

Lia March 19, 2012 at 10:23 am

This book title sounds like it’s trying to take advantage of the popularity of Apple products! That said, I also don’t like any diet that claims to be healthy and doesn’t include physical activity in its focus.


Lizzy November 20, 2012 at 1:26 pm

LOL that’s funny!


Paige April 13, 2012 at 12:18 am

I lost 9 lbs in 10 weeks following this diet. I have been trying to rid myself of this weight for years, and this is the only diet that actually did it. I love how the menu is structured (I need structure as I can’t be left to my own devices) each day has meat or vegetarian option, and within that, there are options for home cooking or prepared foods. So everything is pre-planed, but there are options within the stucture.


Brenda October 6, 2012 at 6:29 pm

I really love this diet. Finally, something that gets me to where I want to be without having to starve myself!


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