Mastering Diabetes Retreat: Changes in Insulin Sensitivity Following 4 Days of a Low-Fat Plant-Based Diet

It’s always a rare opportunity to learn about the day-to-day life of people living with both type 1 and type 2 diabetes. While everybody has their own individualized methods for controlling blood glucose, preserving insulin sensitivity, performing frequent exercise and taking medication, the one puzzle piece that unites many living with diabetes is simple:

Unfortunately, many people living with diabetes suffer from a serious lack of education about the actual cause of blood glucose variability. And it’s not their fault.


There seems to be a gross miss understanding of diabetes nutrition, which has resulted in alarmingly high rates of diabetes across the U.S. and across the world. On one hand, our country has some of the best medical care in the world. On the other hand, understanding exactly what to put into your mouth when living with diabetes has become an endlessly confusing question with a multitude of misleading answers.

That’s exactly why we put on the Mastering Diabetes Retreat in Southern California in January 2016. It provided us with an opportunity to connect and learn from individuals living around the world with both type 1 diabetes and type 2 diabetes.

I co-hosted the retreat with many extremely talented individuals – Jewels Brown and Robby Barbaro. In addition, we had top-notch medical support from Kylie Buckner RN, MSN, and Dr. Nancy Bohannon M.D., a diabetes endocrinologist practicing in San Francisco.  This all-star team of diabetes experts included Stefanie Dougherty, and our mission was to instruct, inspire and motivate people living with both type 1 and type 2 diabetes to understand a completely new version of nutrition and fitness for diabetes management, from the ground up. Watch this video for an idea of how much fun we had:  


Retreat Protocol

Step 1: On day 1 we transitioned everyone to a low-fat, raw food vegan diet. We chose a raw diet in order to simplify food preparation, make exceptionally tasty food, and because a low-fat, raw-food vegan diet is quickly becoming the new gold-standard for reversing insulin resistance in a repeatable manner.

Step 2: We maintained all individuals on this diet for 4 days in a row.

Step 3: We encouraged all participants to exercise twice per day – once in the middle of the morning for 30-45 minutes and once in the middle of the afternoon for 30-45 minutes.

Step 4: We hosted 3 lectures per day about the following topics:

  • Blood glucose variability
  • Emotional eating
  • Intermittent fasting
  • Exercise
  • Insulin resistance
  • Safely reducing medication
  • The biology of insulin
  • Glycogen: the forgotten fuel
  • And much, much more...

Step 5: We attached continuous glucose monitors (CGMs) to 6 individuals in order to understand the acute changes in blood glucose that occur when transitioning to a low-fat plant-based diet


In this article, I will report on only on the acute changes observed in 3 individuals living with type 1 diabetes, to highlight the profound difference a low-fat plant-based diet is capable of producing in a short period of time.

Simply stated, the results were astounding.

Participant #1:

  • 13-year old female
  • Diagnosed with type 1 diabetes in 2013
  • Most recent A1c: 12.0%
  • Average fasting blood glucose: 200+ mg/dL

Participant1A Participant1B

Participant #2:

  • 19-year old female
  • Diagnosed with type 1 diabetes in 2001
  • Most recent A1c: 6.3%
  • Average fasting blood glucose: 152 mg/dL

Participant2A Participant2B

Participant #3:

  • 25-year old female
  • Diagnosed with type 1 diabetes in 1998
  • Most recent A1c: 6.9%
  • Average fasting blood glucose: 142 mg/dL

Participant3A Participant3B


As you can see, participant #1 entered the retreat with an alarmingly high A1c value of 12.0%, and was using an average of 70+ units of insulin per day. Given her diet and lack of diabetes education, her blood glucose values remained above 200 mg/dL at all times. By reducing her fat intake, she was able to reduce her insulin usage by almost 50% in 4 days, while increasing her whole carbohydrate intake, for a combined insulin sensitivity increase of 245%.

Participants #2 and #3 both entered the retreat with great A1c values of 6.3% and 6.9%, respectively. Despite these A1c values, both participants experienced significant increases in their insulin sensitivity by dropping their fat intake below 20 grams per day.

Participant #2 more than doubled her carbohydrate intake while reducing her insulin usage by 33%. Participant #3 increased her carbohydrate intake by 62% while still recognizing a 17% drop in insulin usage.

The common threads that unite these 3 individuals are simple:

  • They each reduced their total dietary fat intake to less than 20 grams per day
  • They each increased their whole carbohydrate intake significantly
  • They each reduced their insulin usage in order to minimize hypoglycemia

How to Calculate Insulin Sensitivity

In each of these scenarios, insulin sensitivity was calculated as the ratio of 24-hour carbohydrate intake to insulin usage within the same 24-hour period. This gives a metric for the amount of insulin required to effectively metabolize carbohydrates, and is a metric that combines both short-term and long-term insulin.

insulin sensitivity equation

As you can see, in all 3 participants reported here we observed significant improvements in insulin sensitivity within a 4-day period, resulting from both a significant decrease in overall fat intake as well as consistent daily exercise. Teasing out the individual contributions of a low-fat, plant-based diet from daily exercise is not possible given our experimental design, given that both interventions occurred simultaneously. But in the end, understanding the individual contributions of each is less important than understanding the powerful additive effect of both diet and exercise together.

Interested in Attending the Next Retreat?

Given the success of this event, we plan on hosting another Mastering Diabetes Retreat in the very near future. if you are interested in participating in a future event please leave a comment below and we will be sure to notify you as soon as the event is planned.

About The Author

Cyrus Khambatta

Diagnosed with type 1 diabetes at the age of 22, I have spent over a decade learning the fundamentals of nutrition at the doctorate level. My goal is to share my knowledge of practical nutrition and fitness with people with prediabetes, type 1 and type 2 diabetes. Diabetes is an OPPORTUNITY to attain excellent health. Reversing the effects of insulin resistance can be a fun and enjoyable process if the right system is in place. That's why I've spent over 10 years developing a rock solid system that can minimize blood glucose variability and insulin resistance.

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