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.
What changes in bowel movements means can vary from person to person. 1  For example, if it is normal for a person to have three bowel movements per day, and he or she is having only one per day, or one every other day, this may signal constipation. On the other hand, another person's typical bowel pattern may be to have a bowel movement every other day.