You know that sleep is important to your health. But unlike, say, eating vegetables, this isn't a case in which more is necessarily better. In fact, if you're a woman over 65, getting too much sleep can actually increase your risk for Alzheimer's and dementia just as much as getting too little sleep can.

Do you know what type of cancer kills more people in the U.S. than any other? It's lung cancer. Yes, 90% of all lung cancer cases are due to smoking. But the other 10% of those cases occur in non-smokers. And lung cancer is just one of many diseases that affect the lungs of both smokers and non-smokers.

Age-related macular degeneration (ARMD) is a serious problem. I just saw a 58-year-old woman the other day who is very concerned about it. Both of her parents lost their vision from ARMD. And her last eye examination showed the presence of drusen.