Tony Robbins

So growth hormone diminishes at 30.

So you don't get as much growth hormone, both men and women.

So when you go into a fasted state of 24 hours, you increase this hormone that is the precursor to making every hormone.

Now, this is really interesting because in a man's body, the main sex hormone they have to focus on is testosterone.

Testosterone gets made in the testes and it goes up to the brain and converts to estrogen.

They don't make estrogen in their bodies, and there's not much progesterone.

So when we were originally looking at the early studies on fasting, we were like, okay, well, if growth hormone goes up by 1300% in a man, testosterone must follow.

So it was a nonlinear way of looking at sex hormones.

Now, new studies have come out, and they've done specifically on men and fasting and testosterone, and they're conflicting.

Some of them say testosterone goes up.

Some of them say testosterone goes down.

Right.

But the study, if I had just said growth hormone, we would have been fine.

But I, in the hour, two hour and 30 minutes in- Right, you said the wrong word.

I said the wrong hormone.

And that fueled the whole thing.

So

So when we first started teaching fasting on socials, there were so many questions about what you can do in your fasting window.

So people were like, can I have coffee?

Can I drink juice?