The science of gerontology has evolved as longevity has improved. Researchers in this field are diverse and are trained in areas such as physiology, social science, psychology, public health, and policy. A more complete definition of gerontology includes all of the following:
Smelly bowel movements are caused by the release of gas. when bacteria, bile or acid mixes with food. Depending on the. food you eat, and where in your digestive tract the mixing. occurs, the combinations can produce various types of gas, all. with different smells.
There are other causes as well, and in fact, bowel movements may only appear to be black, when in fact, theyâre just a very dark green, brown or purple. âStools can be dark green or even brown, and if it is dark, itâs okay,â says Sander R. Binderow, MD, FACS, FASCRS of Atlanta Colon & Rectal Surgery. âThe color, consistency and smell of a stool are for the most part not as important when it comes to diagnosing a disease or colorectal cancer.