Dr. Jason Fung

Its job is to tell you to store those calories, right?

And you store it as body fat.

So therefore, your body has lots of calories floating around and your body has plenty of energy.

So it's like, why do I need to eat, right?

So compare that to an 800 calorie, say, frappuccino.

Well, still 800 calories, all refined carbohydrates.

What's going to happen?

Well, your sugar will spike up.

Your insulin will spike up.

You don't get any of the satiety hormones.

You're hungry like five minutes later.

Like literally, you could eat that full, you know, three egg omelet plus that.

Well, since they're both the same number of calories, why would you think that the only thing that matters is your calories?

It's not because the hormonal pattern is completely different.

So what your body does with the calories is just as important.

Like if you look at the energy balance equation, right?

So the energy balance equation says body fat equals calories in minus calories out.

That's fine.

Body fat is a store of calories.

You can simply rewrite that equation and you can say calories in or what you eat equals body fat plus calories out.