AS we age we know our bodies change and adjust.  ALL bodies change slightly differently, depending on genetics, sex and lifestyle.  On thing that is for sure common to ALL aging, is the food absorption capabilities. An important word for the GUT and absorption is Microflora ... It is the microbes that reside within the human gastrointestinal, urogenital tract and skin etc.  It is both persistent and stable and under normal circumstances, does not elicit an acute immune response . It represents 85% of the total microbes in the gastro intestinal system  Microflora help the immune system, in fact they are the body's immune responders... Good bacteria in the GIT (gastro-intestinal tract) migrates to colonize the urogenital tract and the vaginal tract. We have immune tolerance to good bacteria just like we do to a baby during the pregnancies and ourselves If we develop an intolerance to the good bacteria; inflammation and chronic condition