Topic > s COPD, chronic obstructive pulmonary disease for which he takes two different inhalants. He also has prostate cancer for which he takes vitamin D supplements and an injection every six months. As stated in Chapter 3, Physical Aging, there are respiratory changes. The maximum amount of oxygen that can be introduced into the lungs with a deep breath decreases, among other things, with advancing age. He said that, reflecting on his experience of aging, if he could give one piece of advice to his younger self, he would say, “Don't smoke.” Fortunately, over the years, she said she has not experienced any age discrimination or negative attitudes or comments about her age. He said as he gets older he has had positive experiences such as becoming a senior citizen