This paper goes over the family of enzymes in the body that are responsible for metabolizing drugs and determining which ones will work best for each and every person. Cytochrome P-450 or CYP is the enzyme family that is responsible for breaking down the drugs we use in our daily lives or during sickness. The idea of this enzyme is to oxidise the drugs as a method of making them more water soluble. These enzymes are usually found in the liver, but can be found in the small intestine as well and usually are in the microsomal of the cell. The CYP in animals is codependent on the ones in plant cells due because of the creation of toxins to fight off the others toxins, helps to create variation in the types of CYP enzymes there are. And every person