Dr. Ania Jastreboff

So an environment that is filled with ultra-processed food, lack of physical activity, lots of stress, lack of sleep, all these things lead to the development of obesity.

They confuse our biology.

And our biology is doing the best that it can to adjust.

But if we had been born, let's say somebody was supposed to be normal weight 100 years ago.

Fast forward to right now, they may actually have overweight or be overweight.

If somebody was supposed to be overweight 100 years ago, if they were born now, they may actually have obesity.

And that's because our environment changed much more quickly than our biology.

Because our biology evolved thousands of years ago, hundreds of thousands of years ago.

She does.

She does.

She does.

And Reese does not have this problem.

Yeah.

And you may walk your dogs together.

So genetically, she may have genetic thinness.

And I don't know.

I don't know the details of Reese Witherspoon.

But she may be more likely to be resistant to that environment.

But most of us, most of us are not.

Most of us end up gaining weight.