Tony Robbins

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.

That's messed up.

Like estrogen helped your body use glucose for energy and now she's gone and your cells or she's going away, your cells don't know how to keep itself metabolically healthy.

So this is why so many women gain weight.

Your go-to at that point is fasting.

Like with Age Like a Girl, I have doubled down on fasting for menopausal women.

It is absolutely the tool.

And let me tell you why.

When you go, and we can break it out according to somebody's lifestyle, but when you go into a longer fasted state, what happens is your body makes a ketone.

And the only way it can make a ketone is by burning fat.