Take Grandpa to happy hour - in moderation, beer has been proven to promote blood vessel dilation, sleep and urination in older people. Strokes are the third-leading cause of death in the United States, and that blood vessel dilation is key in preventing them. A Harvard study proved that beer seems to preserve the mental abilities of older women as well. One to three drinks per week seems to be the best rule of thumb in reaping the health benefits of beer - and not all in one sitting. Any more, and you risk building up that dreaded beer belly.