Laughing is good for you in so many ways, let's just cover a few. A study by Mayo Clinic tells us that "Laughter enhances your intake of oxygen-rich air, stimulates your heart, lungs and muscles." Another reason laughing is beneficial is that laughing releases endorphins in the brain, which can help you to release stress(Mayo Clinic Study). As you can see, laughing can be so advantageous to us in many ways.
