What Physician Assistants Do. Physician assistants, also known as PAs, practice medicine on a team under the supervision of physicians and surgeons. They are formally educated to examine patients, diagnose injuries and illnesses, and provide treatment.he work of physician assistants depends in large part on their specialty and what their supervising physician needs them to do. For example, a physician assistant working in surgery may close incisions and provide care before and after the operation.
Overview. Vitamin B12, also called cobalamin, is one of 8 B vitamins. All B vitamins help the body convert food (carbohydrates) into fuel (glucose), which is used to produce energy. These B vitamins, often referred to as B complex vitamins, also help the body use fats and protein.egetarians who do not eat any animal products should take a vitamin B12 supplement with water, preferably after eating. Elderly people may need larger amounts of vitamin B12 than younger people because the body's ability to absorb vitamin B12 from the diet goes down with age.
The first question: why do we need Vitamin B12? Quoting from Wikipedia: Vitamin B12, vitamin B12 or vitamin B-12, also called cobalamin, is a water-soluble vitamin with a key role in the normal functioning of the brain and nervous system, and for the formation of blood. It is one of the eight B vitamins. Why do we need B12? Because we were evolved to do so.