|Nutritional biochemistry is the study of nutrition as a science. Nutritional biochemistry deals with various studies in nutrients, food constituents and their function regarding humans and other mammals, nutritional biochemistry specifically focuses on nutrient chemical components, and how they function biochemically, physiologically, metabolically, as well as their impact on disease. Nutritional Biochemical research is mostly involved upon defining dietary and nutritional needs in sick and healthy individuals and the reduction of side effects of pharmaceutical drugs. A journal is a periodical publication intended to further progress of science, usually by reporting new research. Most journals are highly specialized, although some of the oldest journals publish articles, reviews, editorials, short communications, letters, and scientific papers across a wide range of scientific fields. Journals contain articles that peer reviewed, in an attempt to ensure that articles meet the journal's standards of quality, and scientific validity. Each such journal article becomes part of the permanent scientific record.