Leucine

Definition

Leucine is an essential amino acid that plays a crucial role in protein synthesis and muscle repair.

Scientific / Technical Definition

Leucine is a branched-chain amino acid (BCAA) that is essential in humans, meaning the body cannot synthesize it and it must be obtained through the diet. It is critical for protein biosynthesis and metabolic functions involving glucose homeostasis and insulin signaling.

Benefits

• Supports muscle growth and repair
• Aids in maintaining muscle mass during weight loss
• Enhances physical performance and recovery
• Regulates blood sugar levels

Examples

• Chicken
• Beef
• Eggs
• Fish
• Soybeans
• Almonds

Additional Information

• Importance: Leucine is important for stimulating muscular protein synthesis following physical or muscular stress such as exercise or injury.

Related Terms

• Isoleucine
• Valine
• Branched-Chain Amino Acids
• Protein Synthesis
• Amino Acids

References

• Role of Leucine in the Regulation of Muscle Protein Synthesis
• Leucine: A Nutrient 'Trigger' for Muscle Anabolism and Exercise Performance