Dr. Jason Fung

You have to think about what the hormones are because that's the instructions to your body.

food contains calories energy but it contains instructions as to what to do so let's take an example you're eating 2000 calories in 2000 calories out now you go on a diet you want to you take in 1500 but what you do is you do some intermittent fasting when you fast insulin is going to fall that's the whole point insulin is a hormone that goes up when you eat it goes down when you don't eat right so

When you eat, insulin goes up.

Your body wants to store energy.

When you don't eat, insulin goes down.

Your body says, I have no energy.

I have no food coming in.

Please take it out of storage.

So now you take 1500 calories, but you do intermittent fasting.

So you're allowing your insulin levels to fall.

Now, 1500 calories are coming in.

Insulin levels are low.

Your body wants to burn 2000 calories.

It says, well, insulin levels are low.

Let me take 500 calories from my body fat.

Guess what?

You have 500 coming from your body fat.

You have 1,500 coming from your foods.

You burn 2,000.

It's a balanced equation.