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 are odors? An odor is another word for a smell. When you notice an odor, that tells you that you are exposed to something in the air that triggered your sense of smell. An odor might be due to a single chemical or mixture of chemicals. Chemicals vary in their ability to produce odors and people vary in their ability to smell odors. Smelling an odor doesn't tell how much exposure you have. It also doesn't tell you whether or not what you are smelling will cause health effects.