What is the primary use of proteins in the human body?

Proteins play a crucial role in the human body, primarily serving as building blocks for various structures and functions. One of the most important uses of proteins is the synthesis of hormones and enzymes. Hormones, which are signaling molecules, regulate numerous physiological processes—from metabolism to growth and development—while enzymes act as catalysts that facilitate biochemical reactions necessary for bodily functions. This includes digestion, metabolism, DNA replication, and many other critical bodil processes.

Proteins are made up of amino acids, which link together in specific sequences to form proteins that can perform a variety of roles. The unique sequence and structure of each protein determine its specific function, thus underscoring the vital importance of proteins in maintaining homeostasis and supporting a wide array of biological functions within the body.

While proteins can also provide energy under certain circumstances, their primary and most critical roles involve structural support, transport, defense (as in antibodies), and the regulation of various processes through hormones and enzymes. This distinguishes their primary function from those clumped within energy storage, cellular respiration, or fat digestion.