What does A fast metabolism, a happy outlook have to do with one another?

The key to this connection is the hunger hormone leptin. This hormone tells your brain that you feel full.

Leptin impacts not only your appetite but your mood as well.

When leptin declines, it sends a signal to your body that you need to eat. That stimulates dopamine production, which in turn increases your motivation and mood.

So hunger is good but too much is not. Create a happy healthy balance and both your mood and your metabolism will thank you!