Gary Brecka

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Let's get to sleep.

You spend an entire one third of your life asleep on a mattress, but one in three people around the world are not getting enough of it.

And a lot of people treat sleep deprivation like a badge of honor.

Sleep is so fundamental to life that it's built into every creature with a nervous system.

So why is it that modern humans are the only species that are voluntarily cutting sleep short?

And what is it actually costing us?

I'm a biohacker and human biologist, Gary Brekka, and you're listening to the Ultimate Human Podcast, where we dig into the real science behind longevity and disease prevention.

Today, we're talking about something that affects every single person listening, sleep.

But this isn't going to be another episode telling you that sleep is important.

You already know that.

Instead, I'm going to show you what happens to your body when you don't get enough sleep, how fast those changes happen.

Researchers at Harvard Medical School wanted to answer a simple question.

What happens to your body's ability to process sugar when you don't sleep eight hours?

They brought in healthy young men into a clinical research center, and these were guys with no health problems, normal weight, no history of diabetes in any of their families.

The researchers restricted the participants' sleep to just five hours per night for one week, just seven nights of sleep deprivation for five hours.

They controlled everything else, the same food, same activity levels, even the same environment.

The only variable that changed was sleep.