What’s the best way to lose weight? Should you reduce the total number of calories in your diet or lower the total glycemic load? There is scientific evidence to support both approaches, so which one should you follow? Well, it turns out that both are important!

Everyone knows that calories are important, but not everyone knows that when you eat those calories you can do three things with them: burn them for energy; store them as fat; or use them to build lean body mass.

What you do with those calories is determined by hormones in your body, the most important being insulin. Your insulin level is determined not only by the number of calories you eat, but also by the type of calories you eat.

This is why what you eat (glycemic load) is as important as how much you eat (calories)!

The Low-Glycal Diet™ app by BioFit uses both glycemic load and calories to calculate the number of “glycals” in a meal, which is a better predictor of how fattening that meal will be.

The “glycal” is calculated from a formula developed by Dr. Jeffrey S. Dunham, M.D., Ph.D., M.P.H., medical director of BioFit Medical Group and graduate of Harvard Medical School, and is based on the latest medical research.

The total number of glycals in a meal equals the total number of calories in a meal that will be stored as fat.

The Low-Glycal Diet™ app by BioFit contains over 1000 easy-to-find foods which are color coded as green (low-glycal), yellow (medium-glycal), or red (high-glycal) if eaten alone.

You assemble a meal by choosing the individual foods in that meal. The app then calculates the total number of glycals in that meal and gives you a green, yellow or red result.

The number of glycals will change depending on how you pair foods together. For example, eating two fried eggs (a green food) with two slices of cheddar cheese (a green food) will give you a green meal, but eating two fried eggs with two slices of dry whole wheat toast (a green food) will give you a red meal.

The ranges of green, yellow and red also change depending on when you have the meal, since eating carbohydrates after 6PM can be more fattening than eating them in earlier in the day.

You never have to be hungry on The Low-Glycal Diet™ by BioFit. You can have all the green meals you want in a day, as long as they are separated by two hours. You’re allowed one yellow meal a day and one red meal a week.

The fat loss is almost effortless, so start losing fat today!

Unleash the full power of The Low-Glycal Diet with Low-Glycal PRO:

Glycal Tracking – Calculates customized maximum daily glycal ranges based on your age, gender, height, weight and hours of sleep. Graphs daily glycals so you can monitor your progress visually.
Calorie Tracking – Counts and graphs your total daily caloric intake.
Glycemic Load Tracking – Tabulates and graphs daily glycal load totals. The perfect tool for diabetics!
Favorite Meals – Saves the complete meals and snacks you eat most often in one convenient, time-saving location.
Meal Diary – Creates a record of all the meals you eat each day and stores them for future reference.
My Weight – Records and graphs your weight loss over time.

Low-Glycal PRO requires a $3.99 one-time fee. Payment will be charged to your iTunes Account at confirmation of purchase.

What’s New

Version 2.3

We've updated the app for full iOS 10 compatibility, and have improved the overall user experience! We've also fixed a number of bugs that caused issues for some users.

Ratings and Reviews

3.2 out of 5
52 Ratings
52 Ratings
Syl223456789 ,

Great tool!

A few weeks ago I went to a nutritionist to help me lose weight and get as healthy as I can. I learned that sugar is the root of all evil in your body. It creates inflammation, and inflammation leads to cancer, heart disease, joint pain and many other problems.

The nutritionist put me on a diet free from sugar and processed foods and free from high glycemic foods. I do not feel hungry most of the time, my joint pain is significantly reduced, I am losing weight and I feel great. I think this is the answer for me!

Finding this app has been very useful for me. I have learned some things that I didn't know and I'm very grateful for this information to be put out there in such clear and simple terms.

I learned that eating the same meal earlier in the evening is much healthier than eating it later in the evening. We have all heard that, but understanding the science behind it makes it all that much more significant in the choices I make.

This is a great app. Thank you! I also bought the book. It's very educational! This is the real science behind how the body stores and releases fat. Knowledge is power. Thank you!

2littlegirls ,

Good, but wish there were more foods

This app has the potential to be great. I've used other apps before that require you to keep a food diary, so to speak, and this is the one that had the fewest amount of foods in the database. There is not even an option to add a food and enter the nutrition information - this would be another great option. To get there most out of it, I recommend that you purchase the book and then the pro version of the app. It helps to understand the science behind it in order to be successful. I want to love this app, but it needs to have the capability to add custom foods based on nutrition facts in order for me to give it five stars. There are just too many food options missing in the app.

Fz32 ,

Works as expected.

As you can see from other reviews some folks have problems with this app. I bought the pro version and it has functioned fine on my 6+. I do agree the food list is somewhat limited and there seems to be a bug in seeing your weight data over a long period of time.

But the key thing is the app works with the book and so far I am very please with the results! The book without the app would not be as effective; together they are great!


Biofit, Inc.
40.1 MB
Health & Fitness
Requires iOS 7.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© BioFit, Inc.
In-App Purchases
  1. Low-Glycal PRO $0.99
  2. Low-Glycal PRO $3.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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