Amino acids are the building blocks of protein and are essential for muscle growth and repair, as well as overall bodily functions. There are 20 amino acids, with nine of them considered essential as they cannot be produced by the body and must be obtained through the diet or supplements. Amino acid supplements may be taken in the form of single amino acids like branched-chain amino acids (BCAAs), or in blends that combine multiple amino acids to provide a complete profile. Some popular amino acid blends include EAA (essential amino acid) blends, which provide all nine essential amino acids, and intra-workout blends, which are designed to support energy and performance during exercise. Amino acid supplements may be particularly beneficial for athletes and those who engage in regular exercise, as they can support muscle growth, reduce muscle breakdown, and improve exercise performance. It's important to note that amino acid supplements should not replace a healthy diet, and it's always recommended to consult with a healthcare professional before starting any supplement regimen.