L-Leucine is an essential amino acid that is crucial for protein synthesis, muscle growth, and repair. It cannot be produced by the human body and must be obtained through food or supplements. L-Leucine is commonly found in animal products such as meat, dairy, and eggs, as well as in plant-based sources like soybeans, peanuts, and whole grains.

As a dietary supplement, L-Leucine is often used by athletes and bodybuilders to promote muscle protein synthesis and enhance recovery after exercise. It is also believed to improve insulin sensitivity and support weight loss efforts.

L-Leucine is safe for most people when taken in recommended doses. However, individuals with certain medical conditions or those taking certain medications should consult with their healthcare provider before taking L-Leucine supplements. As with any supplement, it is important to purchase from a reputable source and follow dosage instructions carefully.