Those who laugh more tend to live longer, as indicated by two studies. A 7-year study of over 54,000 Norwegians found a 35% longer life for those who laughed more. A 15-year study with 53,000 participants showed that women who laughed frequently had a 48% lower risk of death from all causes, 73% lower risk of heart disease, and an 83% lower risk of infection. Men experienced a 74% reduced risk of death from infection.
The biological explanation lies in laughter reducing stress and boosting feel-good hormones, supporting a healthier immune system. The act of laughing, involving tension and relaxation, has a calming effect on the body. Additionally, laughter promotes communication, enhancing social relationships linked to longevity. While gender differences are not entirely clear, one potential factor is that, on average, men had lower humor scores as they aged compared to women.