― LAUGHTER REALLY IS THE BEST MEDICINE ~ here's just 5 reasons why you should put a smile on your dial and have a good belly laugh... ∙ 1. Laughter boosts your immune system. According to some studies, laughter helps to boost your immune system and may even increase the number of cancer-killing cells in your body. Doing something that feels good and is good for you? Sounds good to me! ∙ 2. Laughter release endorphins. And speaking of feeling good... when you laugh, you trigger a [...].