Insulin and Insulin Resistance

Before we go any further, I want you to understand insulin because you're going to hear that word throughout this guide.

I don't want to make this complicated.

You don't need a medical degree to understand the basic idea.

You eat → your blood glucose changes → your body responds → insulin helps manage that glucose.

And understanding that simple process can help you understand why changing what you eat can change what's happening metabolically inside your body.

What Is Blood Glucose?

Let's start with blood glucose, sometimes called blood sugar.

When you eat carbohydrates, those carbohydrates are broken down into glucose.

After a higher-carbohydrate meal, more glucose enters your bloodstream and your blood glucose rises.

Your body then has to do something with that glucose.

That's where insulin comes in.

What Does Insulin Do?

Insulin is a hormone your body needs.

I don't want you thinking:

“Insulin is bad.”

That's too simple, and it's not how I want you understanding this.

One of insulin's major jobs is helping move glucose out of your bloodstream and into your cells, helping bring your blood glucose back down.

Think about it in very simple terms.

You eat carbohydrates.

Those carbohydrates can raise your blood glucose.

Your body releases insulin.

Insulin helps your cells deal with that glucose.

That's a normal physiological process.

And this is important:

The fact that insulin rises after you eat is not automatically a problem.

Your body is supposed to make insulin.

The concern we're talking about is when the insulin and glucose system isn't working as well as it should over time.

The material we've already developed makes this distinction directly: insulin isn't some evil hormone that needs to stay as low as possible every second of the day; the bigger concern is chronically elevated insulin and insulin resistance.

What Is Insulin Resistance?

Now let's talk about insulin resistance.

The source material doesn't give us a long technical definition, so I'm going to keep this at the level the material supports.

Normally, insulin is part of the system your body uses to manage glucose.

But with insulin resistance, that system is no longer functioning as effectively as it should.

That's why insulin resistance keeps coming up whenever we're talking about metabolic health.

The material you've gathered specifically connects insulin resistance with metabolic dysfunction, and it notes that fasting and ketogenic diets are often discussed in relation to insulin sensitivity and metabolic health because insulin generally becomes lower when you're not continually eating.

Here's how I want you thinking about it:

Insulin itself isn't the enemy.

The problem is when your body's relationship with insulin becomes dysfunctional.

That's a very different message.

What Is Hyperinsulinemia?

You're also going to hear the word:

Hyperinsulinemia.

The material we've gathered doesn't separately define that term, but it repeatedly talks about the problem of chronically elevated insulin.

That's what I want you connecting with this word in this guide.

Hyperinsulinemia means having abnormally high levels of insulin circulating in the blood.

Again, don't confuse that with the normal rise in insulin that occurs after you eat.

You eat a meal.

Insulin rises.

Then it comes back down.

That's normal.

What we're concerned about is insulin staying too high too often or chronically, particularly in the context of insulin resistance and metabolic dysfunction.

That's why I keep coming back to this distinction:

Normal insulin response ≠ bad.

Chronically elevated insulin + insulin resistance = something we need to pay attention to.

Carbohydrates, Blood Glucose, and Insulin

Now let's connect this back to food.

The relationship is fairly simple.

Carbohydrates are broken down into glucose.

That can raise blood glucose.

Your body responds by releasing insulin.

Protein can also stimulate insulin, but the material describes its response as generally different from a large serving of carbohydrates.

Dietary fat has very little immediate effect on blood glucose compared with carbohydrates.

So when somebody dramatically reduces carbohydrate intake, insulin levels will generally come down as well.

That's one of the metabolic changes we've already discussed with both carnivore and ketogenic diets.

And when carbohydrate availability becomes low enough, another change can occur.

Your body can begin producing more ketones and relying more heavily on fat-derived fuel.

That's nutritional ketosis.

The material you've developed explains it this way: when carbohydrate intake is greatly restricted, insulin levels generally decrease and the liver begins converting fatty acids into ketones that can be used as an alternative source of energy.

So you can start seeing how these ideas connect:

More carbohydrate availability → generally more glucose entering the system → insulin response

versus:

Much lower carbohydrate availability → generally lower insulin → greater reliance on fat-derived fuel and ketones

That's one of the basic metabolic ideas behind the Zapp the Fat Diet.

But Don't Turn Insulin Into the Villain

I want to repeat this because it's easy to misunderstand.

Some people learn about insulin and immediately decide:

“The lower my insulin is, the better. Insulin is bad.”

No.

That's not the lesson.

The material we've already developed specifically warns against that way of thinking.

Protein causes a normal insulin response.

Larger meals may produce a larger physiological response than very small meals.

And that's okay.

Insulin is a normal hormone your body needs.

We're not trying to eliminate insulin.

We're trying to understand how food, blood glucose, insulin, and metabolic health interact.

Why Eating All Day Can Matter

Another thing I want you thinking about is how often you're eating.

The material makes the point that if you're eating all day long—particularly a lot of sugar and refined carbohydrates—your glucose and insulin environment can look very different from what happens when you stop eating for a period of time.

During fasting, insulin generally becomes lower.

That creates a different metabolic environment.

That's also one reason I've talked elsewhere in this guide about unnecessary snacking.

You don't necessarily have to eat:

Breakfast.

Snack.

Lunch.

Snack.

Dinner.

Another snack.

And then something before bed.

If you're eating enough fat and protein at your meals and you're not hungry between them, you don't necessarily need to keep eating simply because the clock says it's time.

Again:

Keep it simple.

Why Metabolic Health Matters

When I use the term metabolic health, I'm talking about how well your body is handling things such as fuel, glucose, insulin, and stored energy.

That's why metabolic health matters in a weight-loss guide.

We're not just talking about:

“How many pounds did I lose?”

We're trying to understand what's going on underneath that number.

The material we've developed connects insulin resistance and metabolic dysfunction with issues such as fatty liver, while also being careful to say that these conditions can have multiple causes and shouldn't be reduced to one food or nutrient.

That's how I want you thinking throughout this guide.

Don't reduce everything to:

“Carbs caused everything.”

or:

“Insulin caused everything.”

Your body is more complicated than that.

But these are important pieces of the metabolic picture.

Why Lower-Carbohydrate Diets Change the Metabolic Environment

This is one of the reasons ketogenic diets are so different from a standard high-carbohydrate way of eating.

With a ketogenic diet, carbohydrate intake is intentionally restricted enough to promote nutritional ketosis.

As carbohydrate availability falls:

Insulin generally decreases.

Your body begins relying more on stored fuel.

Your liver produces more ketones.

And those ketones can become another fuel source, including for the brain.

That's what we mean when we talk about your metabolism becoming more flexible.

Your body isn't limited to using only glucose.

It can use glucose and ketones, depending on the metabolic environment.

Everybody Doesn't Respond Exactly the Same

This is also extremely important.

Everybody is different.

Don't assume that because one person eats a certain amount of carbohydrates and gets one result, you're automatically going to get the exact same result.

The material you've gathered repeatedly makes this point.

For example, the amount of carbohydrate somebody can eat while remaining in ketosis varies from person to person.

The same thing happens with how quickly someone gets deeper into ketosis.

Someone who is already eating a ketogenic diet may get there faster.

Someone coming from a high-carbohydrate diet may take longer.

That's why I don't want you chasing somebody else's exact numbers.

Your metabolic response can differ depending on where you're starting, what you're eating, how much carbohydrate you're consuming, whether you've already adapted to a low-carbohydrate diet, and other individual factors.

So don't look at somebody online and say:

“They ate this and their glucose did that, so mine has to do exactly the same thing.”

It doesn't work that way.

Pay Attention to Your Own Response

This is one of the reasons I like measurable information.

Instead of constantly guessing:

Measure.

Document.

Watch your trend.

Weigh yourself consistently.

Track your waist.

Track your waist-to-height ratio.

And when appropriate for what you're doing, you may also track things such as blood glucose or ketones.

Not because one number tells you everything.

It doesn't.

But because numbers can give you information about how your body is responding.

And I don't want you comparing your first week to somebody who has been ketogenic for two years.

Your response is your response.

The Simple Version

If everything I just taught you feels like a lot, here's what I want you remembering:

Carbohydrates can raise blood glucose.

Insulin helps move glucose from your blood into your cells.

Insulin is normal and necessary.

Insulin resistance means the insulin-glucose system isn't working as effectively as it should.

Hyperinsulinemia refers to abnormally elevated insulin, especially when it remains high chronically.

Eating a lot of sugar and refined carbohydrates throughout the day creates a different glucose-and-insulin environment than fasting or substantially reducing carbohydrates.

When carbohydrates are greatly restricted, insulin generally decreases and your body can begin producing more ketones and relying more on fat-derived fuel.

And everybody's response isn't exactly the same.

That's why I don't want you blindly copying somebody else's diet or numbers.

Learn what is happening.

Pay attention to your body.

Measure your progress.

Make adjustments when necessary.

Stay consistent.

And keep honoring the commitment you made to yourself.

Simple = Success. Commitment = Accountability. Accountability = Results.

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