There are many ways to celebrate St. Patrick's Day, like Irish soda bread at breakfast or corned beef and cabbage for dinner. For those celebrating St. Patrick's Day with green beer, moderation is key. Alcohol has several negative effects on your body -- many of which can amount to a miserable morning after. Find out the science behind those brutal hangovers and alcohol's other effects on the body in our latest video, and maybe we can inspire some caution in your celebration this year.