Leucine

Leucine is an essential amino acid, meaning your body cannot produce it on its own, so you must get it from food. It plays a key role in building and repairing muscles, supporting energy production, and helping regulate blood sugar levels. Found mainly in protein-rich foods like meat, dairy, eggs, and plant sources such as beans and nuts, leucine is particularly important for athletes and those recovering from injury. It also activates a pathway that promotes muscle growth and prevents muscle breakdown, making it vital for maintaining lean muscle mass and overall health.