The Insulin Index May Make You Skinny

The Insulin Index May Make You Skinny

The Insulin Index May Make You Skinny


Who isn’t looking to lose weight these days? Well, there is good news – the insulin index may make you skinny! Educating yourself on the insulin index can go a long ways in helping you to either maintain your weight or lose unwanted pounds.

Wikipedia states: The Insulin Index of food represents how much it elevates the concentration of insulin in the blood during the two-hour period after the food is ingested.

The insulin index or food insulin index (FII) – can help with weight loss because knowing the potential impact of any given food on insulin levels will allow you to choose foods that do not spike insulin. These spikes lead to weight gain and metabolic chaos.

The Insulin Index May Make You Skinny

How The Insulin Index Differs From The Glycemic Index


The glycemic index is associated with blood-sugar levels, and the impact food as on blood-sugar rise. For instance, ice cream and candy are high on the glycemic index due to the rise in blood sugar they cause, whereas, low-starch vegetables would be low on the glycemic index because they cause a negligible rise in blood sugar.

The FII may be more effective as a weight-loss tool than the glycemic index (GI) because it measures insulin release, which is the fundamental problem in obesity, insulin resistance, and diabetes -with all the complications associated with these two conditions.

For instance, a meal that is low glycemic may still require a lot of insulin, but may not cause a significant rise in blood glucose because it digests more slowly, in part due to the fiber content. An example of this would be low fat-dairy products.

Low-fat flavored yogurt rates 21 on the GI, but 84 on the FII. Low-fat foods are typically sweetened with artificial sweeteners, which are not taken into account in the GI, but are very relevant in the FII because they do, in fact, stimulate insulin. The FII also takes into account protein and fiber. Quantity and quality are both important.

Another difference between the GI and FII pertains to foods containing a lot of fructose. These foods may not cause blood-sugar spikes, but they do cause rises in insulin. This is why foods that were previously considered safe for people with diabetes, may not be ideal after all.

Health Test Express

The FII Is More Comprehensive


The FII is more comprehensive as a guide to blood-sugar levels than the GI. While the GI can help decrease diabetic markers, such as the A1C, by focusing on low-glycemic carbs, it doesn’t factor in the other macronutrients protein and fat.

The FII takes into account other foods than just carbohydrates – like protein for example, which does raise insulin levels. Fat is a neutral macro nutrient, meaning it does not stimulate insulin.

The reason the FII is so relevant regarding weight loss is that you cannot burn fat in the presence of insulin. Not only do elevated insulin levels lead to weight gain, these elevated levels also prevent weight loss. Think of it as your fat being held hostage. Not a pleasant visual I know.

High-insulin levels will also promote cravings after meals so it’s basically three strikes you’re out on the fat-loss front until these levels come down. That’s just how human biochemistry works.

This explains why fat, although higher in calories, ranks low on the FII as it has a negligible effect on insulin. This is why people lose weight on high-fat eating plans such as the Atkins or Ketogenic Diet.

 The Insulin Index May Make You Skinny?
Chart taken from Beyond Glycemic Index: New Food Insulin Index

by Kent, Franz, Millet and Willet

As you can see the FII may be a more relevant tool, than the GI, for those trying to lose weight because it measures the postprandial (after-meal effect) insulin release of a whole food. It also takes into account the macro nutrients that are consumed at the meal. The GI, however,  only measures the effect of the carbohydrate on postprandial blood-sugar levels. It is not always proportional to the FII.

How Meal Timing Affects Insulin Levels


Sticking to just two or three meals a day is another great way to lower insulin levels, and stimulate the fat-burning hormones glucagon and human growth hormone. Utilizing intermittent fasting is another great tool for this.

If you need to snack between meals, then go for the fat, as it will allow you to continue to burn your body fat for fuel as no insulin release is required. Remember that insulin shuts down fat burning.

The ultimate goal is to burn what you eat and then use your body fat for fuel between meals.  Low-insulin levels, between meals, allow you to tap into your energy stores. This is called balancing the oxidative rate.

The Insulin Index And Weight Loss

Further comparison of the FII and GI


People who are dieting typically try to consume foods low on the GI. This is a helpful strategy. However, a  better model may be to eat foods that are also low on the FII.  These tools can be used in conjunction with each other.

We all remember when the low-fat movement became popular, and  many people gained weight due to the impact of these foods on hormones. Even though fat has twice the calories of protein and carbohydrate, it allows insulin levels to remain low, which is far more conducive to fat loss.

The GI is based more on a calorie model while the FII is based on the hormonal response a particular food evokes. Hormones control metabolism, and we can tell our hormones what to do based on diet and lifestyle factors.  So, in essence,  we have control over metabolism.

Fat is such an important macro nutrient as it is needed for essential fatty acids, production of hormones, cell-membrane integrity, brain function, and improved body composition. However, fat does not contain the necessary micro nutrients needed for healthy physiology so it needs to be balanced by consuming a liberal amount of non-starchy vegetables that are high in the essential micro-nutrients. The fiber from these foods is also important for optimal intestinal health, and increased satiety.

Benefits Of Low Insulin


Increased energy

Increased fat loss

Reduced cravings

Reduced glucose levels

Decreased triglycerides and cholesterol

Diabetes prevention

Decreased inflammation

Decreased blood pressure

Increased longevity

Better brain function

Think of it this way!

Healthy Dietary Fat = Skinny

You can test blood-sugar levels on your own at home. It's easy and effective, however, you'll need to go through a doctor to get your fasting insulin levels checked - fasting insulin test. You want it to be under 5 for sure, but ideally under 3.

Final Thoughts


Can you see the importance of eating according to the insulin index? Identifying foods that require a lowered insulin response will lead to weight loss. Since insulin is an anabolic (building) hormone, you want to keep your levels low.

If weight loss is your goal, try focusing on lowering your insulin levels through your dietary and lifestyle habits. There are many other benefits of decreased insulin, as well, like decreased inflammation, decreased blood pressure, and prevention of diabetes. Since insulin is intricately connected to hormones, lowering it will lead to better hormonal balance.

The FII is more effective for weight loss than just counting carbs as it accounts for the hormonal response generated from foods.

Are your insulin levels higher than they should be? How can you tell?

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