Bilirubin is a dark yellow waste product that is primarily created when the body breaks down hemoglobin, which is the protein in red blood cells that carries oxygen. Bilirubin is found in bile, which is fluid in your liver that is involved in digesting food. Most bilirubin is eliminated in the feces or urine. The bilirubin test checks the health of your liver by measuring the amount of bilirubin in blood or in your urine. This can help diagnose or monitor problems related to your liver or red blood cells when the bilirubin level is too high. Alanine transaminase test is performed to determine the level of alanine transaminase in blood. Alanine transaminase is a type of an enzyme which made by cells present in the liver. A liver plays a vital in human body system such as storing vitamins and iron, cleansing of blood by removing toxins, production of proteins, production of bile which helps in the process of digestion. The proteins secreted by liver helps in the breakdown of another kind of proteins present in different food, to improve the body in the smooth absorption of those proteins. The level of alanine transaminase will help the medics in analyzing the condition of the liver, whether it is healthy or suffering from diseases or some infections.