Most American citizens believe that urine is unsanitary. But in the first century A.D., Romans used urine in their toothpaste in order to whiten their teeth. Urine contains ammonia, which can actually whiten teeth. In spite of this, an ammonia odor from your urine could signify dehydration. Smells from urine are good indicators of the well-being of your body. For example, if there is a musty smell in urine, it is an indication of liver disease, and when the smell becomes foul, it may serve as a hint of a bladder infection. Usually people don’t understand the different smells and indicators in urine, but they do visit doctors’ offices or hospitals to find out. Just like the professionals in these institutions, medical coding and billing specialists are also able to interact with patients – albeit on a different level due to the fact that they work with the patient’s symptoms and insurance firms. Medical billing and coding is a great opportunity for those who want to work in the medical field but are not interested in attending medical school.