Tony Robbins

And then she went back into filming the next series of her show.

And it was like she got the benefit of fasting without the obsession of control.

Because she could use fasting to make ketones when she was on set and she was like focused.

But then when there was a lunch break or a dinner break, she knew the combination of food to put together so that her blood sugar wouldn't spike, so that she wouldn't gain weight.

So it was a different type of control.

You have to eat.

Yeah.

So Fast Like a Girl was the solution to that in the sense that what I taught the world was there were times during your menstrual cycle you don't fast.

And those are during ovulation, day 10 of your cycle to day 15.

You can fast a little bit, like 13, 14 hours, but not more than that.

You want to keep it at a low intermittent fast.

Right.

But the week before your period, you don't fast at all because you need glucose to make progesterone.

And progesterone is the hormone that comes in the week before your period.

So I'm sure you see this in the fitness world.

A lot of people lose their cycle.

A lot of women lose their cycle when there's not enough calories, when there's not enough glucose.

That whole system shuts down.

So I say no fasting the week before your period.

For the menopausal woman, this one's really interesting because estrogen's decline means you become more insulin resistant.