|Metabolism is the procedure getting of energy from the nutrients. Nutrients come from the proteins, carbohydrates and fats. Digestive system helps to break down food particles into sugars and acids gives energy. Body can accumulate this energy in liver, muscle and body fat. A metabolic disorder cause irregular chemical reactions can interrupt this movement. Metabolic disease occurs when some organ not function properly example liver or pancreas. Scholarly peer review is the process of subjecting an author's scholarly work, research, or ideas to the scrutiny of others who are experts in the same field, before a paper describing this work is published in a journal. The work may be accepted, considered acceptable with revisions, or rejected. Peer review requires a community of experts in a given (narrowly defined) field, who are qualified and able to perform reasonably impartial review.