Glutamine is an amino acid that plays a crucial role in various bodily functions. It is considered a "conditionally essential" amino acid, meaning that while the body can produce it, certain conditions, such as intense exercise or illness, may increase the need for it. Glutamine is vital for protein synthesis, immune function, and gut health. This amino acid is found in many protein-rich foods, including meat, fish, eggs, dairy products, and some plant sources like beans and spinach. Additionally, glutamine supplements are popular among athletes and those recovering from surgery or illness, as they may help support muscle recovery and overall health.