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Welcome to the Dr. Berg's Healthy Kito and Interminute fasting podcast, where Dr. Berg takes you on the journey for the truth about getting healthy and losing healthy weight. So let's talk about the relationship between cortisol and your sleep.

First of all, what is cortisol?

It's a stress hormone and has a lot of different functions with the immune system for countering stress.

It's a survival hormone.

And if it's too high, it can definitely interfere with your sleep.

Normally, when you go to bed at night, ideally at 11 o'clock or maybe even 10,

45 would be the perfect time because that is when the circadian waves start happening and I'm talking about the sleep cycles.

So it starts over here, and you go through your different waves

of sleep through the night, from a superficial sleep,

which is the REM sleep,

to the deeper levels, which end up to be the delta wave sleep.

Now, right around between 12 o'clock midnight and 2,

this is where you have the lowest cortisol.

Ideally it should be the lowest amount of cortisol. The highest level of

cortisol is between six, eight, and maybe 9 o'clock in the morning.

But what happens, cortisol can start going higher

earlier through the night

and counter the depth of deep sleep.

So what happens is you might sleep, but you're not getting the deeper restful rejuvenation

...