Some of the most common complaints I get from patients centers around their digestive issues, especially in my over 40 patients. Seems things they used to be able to eat just don't sit well with them anymore, or they are frequently bothered with constipation, gas, cramps, acid reflux, or bloating. As I tell my patients, these can all be signs of poor digestion that can start to occur as early as the age of 30, but really occur more frequently as we get beyond our 40s.