Regular laughter sessions can have important effects on our health and well being. For instance, laughter is considered to be a stress buster and researchers found a direct link between laughter and healthy function of blood vessels. Laughter causes the dilatation of the inner lining of blood vessels, the endothelium, and increases blood flow. It also has been shown to lead to reductions in stress hormones such as cortisol and epinephrine. When laughing the brain also releases endorphins that can relieve some physical pain. Laughter also boosts the number of antibody-producing cells and enhances the effectiveness of T-cells, a type of cells that lead to a stronger immune system.