Creatinine is a toxin produced during the metabolism of meat in our body. Therefore, people with lots of muscles or who eat lots of meat always have a relatively high creatinine level, but it usually fluctuates in the normal range: 0.5-1.3mg/dL.
comet definition An object that enters the inner solar system, typically in a very elongated orbit around the sun. Material is boiled off from the comet by the heat of the sun, so that a characteristic tail is formed.
1 Asteroid; A relative small body, composed or rock, carbon or metal, which is orbiting the Sun. 2  Comet; A relative small body, which is composed of dirt and ice. 3  Comets are characterized by tails of dust and gas, when the comet is near the Sun. 4  Far away from the Sun, comets look similar to asteroids.