| Laughter is an audible expression or appearance of happiness, or an inward feeling of joy. Solid scientific research demonstrates that laughter offers some benefits - improving circulation, lowering blood pressure, reducing stress hormones, strengthening cardiovascular functions A positive link has been found between laughter and a healthy function of blood vessels with laughter causing the tissue that forms the inner lining of blood vessels, the endothelium, to dilate or expand such to increase blood flow |
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