Laughing more often provides several health benefits such as boosting the immune system and increasing immune cells and antibodies that fight infection. It also protects the heart by improving blood vessel function and blood flow, lowers blood pressure to reduce the risk of strokes and heart attacks, and relaxes the body's muscles for up to 45 minutes by relieving physical tension and stress. Making a habit of laughter can also produce a sense of well-being since positivity is associated with better ability to fight diseases.