Americans' collective girth may be bulging at an unprecedented rate, but our appetite for healthier foods is also on the rise. While that may be hard to believe, it should come as less of a surprise when you consider the facts. After all, with age comes an increased concern about one's health, and the first wave of the influential Baby Boom generation has begun to awaken to the vicissitudes of old age. According to a nationally representative survey of 1,000 adults commissioned by the Food Marketing Institute and PREVENTION magazine, 58 percent of â€œmatureâ€? adults (those over the age of 56) say they are trying â€œa lotâ€? to adopt a healthy regimen. Nearly as many Boomers (51 percent) are already trying equally hard to eat healthy, but only 38 percent of adults ages 18 to 37 say the same. But don't expect Boomers to pop pills to stave off the aches of age. While mature Americans lead the way in terms of usage of prescription medication to maintain their health (85 percent of matures use these products versus 69 percent of Boomers and 51 percent of younger adults), Boomers and young adults tend to regard fortified foods as a form of health insurance. More than 7 in 10 Boomers and young adults say they eat fortified foods to stay healthy, compared with 55 percent of mature consumers. Sorry, Doc.