Dr. EA. Koceir, Ph.D Doctor now is a professor of Nutrition and Dietetics in Human Pathologies (NDPH), head of the Bioenergetics and Intermediary Metabolism laboratory in Faculty of Biological Sciences, Department of Biology and Physiology (USTHB, Algiers, Algeria), head of NDHP education program student’s, Member of the Algerian National medical research. He obtained his PhD thesis in Joseph Fourier University (Grenoble, France) in cell physiology and metabolism speciality. And Dr. EA. Koceir is researcher in clinical nutrition at Algiers hospitals (endocrinology and cardiovascular unit). In our laboratory, studies on the mechanisms of cellular physiology about energy flux regulation in mitochondria in liver, muscle, adipose tissue and thyroid.