Why is laughter considered the best medicine?
A. Research is ongoing regarding the potential health benefits of laughter. We do not know if the act of laughter itself is beneficial, or more the sense of humor and positive attitude behind it. When we laugh, we increase our pulse rate and blood pressure, and the effects may be similar to exercise. Researchers have estimated that laughing for 10 to 15 minutes burns 50 calories. Other studies suggest laughter improves blood flow, immune responses and blood sugar levels. Q. What causes butterflies in the stomach? A. This fluttery physical sensation related to nervousness or anxiety often occurs in the early stages of romantic relationships. Some theorize that butterflies are caused by the release of adrenaline, which sends blood away from the stomach and causes it to slow functioning. This, in turn, may create the lack of appetite also seen early in romances. Others speculate that endorphins may affect chemical reactions that result in the butterfly sensations. Q. Why does hair gray? A
