FBI diet

Question
Hi Tanya. Honestly, I'm your old dieter and I do know what FBI is but I want others to know, too.

Answer
Hi Debbie,

Thank you for your question, it's my first one here at allexperts.com :)

Let me start with explanation what the abbreviation FBI stands for. In fact, we prefer using "FBIndex" or "Fat Burning Index" and it's a modified (simplified) "Ketogenic Ratio" the ratio of amount of fat to protein plus carbohydrate in a food or meal  - the higher the ratio, the more ketogenic the diet.


Ketogenic to anti-ketogenic nutrient ratio is calculated by this formula:

K/A=(0.9 fat +0.46 protein) divided by (1.0 carb +0.1 fat+0.58 protein)

The numbers in front of nutrient names are coefficients that are calculated based on nutrient ability to cause ketosis or anti-ketosis.

Clinical ketogenic diets are operated with ketogenic ratio from 2:1 to 5:1. Below 2:1 it is difficult to achieve ketosis, below 1.5:1 ketosis is impossible. "Normal" mixed diet has a ketogenic ratio between 1:2 to 1:3.

Fat Burning Index uses inverse numbers, which are easier to read and remember, e.g., 2 instead of 2:1, 5 instead of 5:1, etc. but the meaning remains: the higher the FBIndex the more ketogenic the meal.

Here's why:

* Carbohydrate is assigned the coefficient 1.0 because it is an absolutely anti-ketogenic and pro-insulin nutrient. The more carbohydrate grams contained in a diet, the less ketone bodies the body can produce and the more insulin it releases.

When carbohydrate intake exceeds 100 gram a day, there can be no ketosis ?period. Because of that, any diet allowing more than 100 grams carbohydrates a day are not ketogenic.

* Fat is a 90-percent ketogenic nutrient because it is only 10-percent efficient in releasing insulin and insulin is a regulator working against ketosis.

* Protein is something in between; an approximately 50-percent ketogenic nutrient. For every 1 gram of protein consumed, 1/2 gram will be inevitably converted into glucose, raising insulin levels and slowing down the ketosis.

However, the rest of consumed protein will stimulate the release of insulin's opponent hormone glucagon, thus helping the ketosis. It is important that sufficient amounts of protein in a weight loss diet allow keep the muscle tissue intact while using body fat for fuel.



Hope this answers the question.  

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