The dry mass of an average human body is made up largely of proteins, lipids, carbohydrates, and nucleic acids. Approximately 60% of the human body is composed of water, but the rest, often referred to as "dry mass," consists of these macromolecules that are essential for life. Proteins contribute to structure, function, and regulation of tissues; lipids play crucial roles in energy storage and cell membrane structure; carbohydrates serve as energy sources and structural components; and nucleic acids, such as DNA and RNA, are vital for genetic information and protein synthesis. Each component is integral to maintaining overall health.