Citric acid cycle, beta-pleated sheets, phospholipids – someone explain that to me! Biochemistry is now an indispensable part of the natural sciences. Whether in medicine, biology, food science, or biotechnology – biochemical knowledge is essential in all scientific disciplines. New methods and discoveries continuously expand our understanding. This concise textbook summarizes the current state of science in the most important areas, explains connections in an easily understandable way, and provides answers to the question of "why." In addition to clear structural formulas and reaction equations, infographics clarify complex topics. It is primarily aimed at students of the life sciences and can be a helpful companion, especially in the early semesters. It also appeals to high school students taking advanced courses in biology or chemistry.