Gary Brecka

At the end of that week, they measured insulin sensitivity using two different tests.

After just one week of sleep restriction, insulin sensitivity dropped by 20%.

Now remember, insulin sensitivity is a good thing that keeps the blood sugar level stable.

When insulin sensitivity drops, more glucose stays in the bloodstream, raising your blood sugar levels.

They also measured free fatty acids in the blood.

These are fats that circulate in your bloodstream and can directly cause insulin resistance.

After sleep restriction, free fatty acid levels increased by up to 30%.

When they looked at who developed these changes the fastest, they found that it didn't matter if you were fit, young, or had perfect health markers going in.

Sleep restriction created pre-diabetic metabolic conditions in everyone within just one week.

Think about what this means.

We're not talking about months or even years of bad sleep.

We're talking about the kind of week that millions of people have regularly.

Late nights working, early mornings at the gym, trying to maximize productivity and cutting into sleep.

And in that one week, your body starts displaying the metabolic markers of someone heading towards diabetes, even if you've been careful with what you eat.

This is such solid proof of what we know that's already true.

You can't supplement or exercise your way around poor sleep.

Let's talk about the effects poor sleep has on your brain.

By waste, we don't mean stool or urine, we mean cellular waste.

One of the most important things

things it clears out is a protein called beta amyloid.