Amino acids are the building blocks of proteins, essential for countless bodily functions. Comprising 20 different types, nine are vital and must be obtained through diet. They play a key role in muscle repair and growth, making them crucial for athletes and active individuals. Beyond that, amino acids support immune function, hormone balance, and neurotransmitter production, influencing mood and cognitive performance. In short, these powerful compounds are fundamental to maintaining optimal health, enhancing physical performance, and promoting effective recovery.