Amino Acids

amino acids

Amino acids are small molecules that serve as the basic building blocks of proteins, which make up muscles, organs, enzymes, and many other parts of the body. There are about twenty standard amino acids used to assemble the vast variety of proteins your body needs. Some amino acids are called essential because the body cannot make them and they must come from food, while others can be produced internally. Beyond building proteins, certain amino acids have additional roles: they can be used for energy, act as chemical messengers, or serve as starting materials for hormones and neurotransmitters. Eating a varied diet supplies the different amino acids the body needs to grow, repair tissue, and carry out daily functions. In health and disease, changes in amino acid availability influence metabolism, immune function, and even how cells sense nutrients. People sometimes take individual amino acid supplements for specific goals, like supporting exercise recovery or addressing a deficiency, but whole foods usually provide the best balance. Understanding amino acids helps explain why protein matters in the diet and how food supports the body’s repair and signaling systems.