L-Leucine is a vital component found in a variety of dietary sources. This essential amino acid can be obtained from both supplements and food, including cheese, soybeans, beef, chicken, pork, nuts, seeds, fish, seafood, and beans. Its presence in a wide range of food groups highlights its importance in a balanced diet.

Also Known As

L-Leucine is commonly referred to simply as Leucine. Here are some other names it goes by:

  • Leucine
  • L-Leucine
  • 2-Amino-4-methylpentanoic acid


L-Leucine is widely used in the fitness and health industries due to its critical role in muscle preservation and energy provision. It’s a popular ingredient in dietary supplements, especially those targeted towards athletes and individuals engaged in regular, intensive physical activities. Moreover, L-Leucine is also valued in medical nutritional products designed to support recovery from illness or surgery by helping maintain muscle mass and balance nitrogen levels in the body.


L-Leucine stands out as an essential branched-chain amino acid that plays a pivotal role in the maintenance and repair of muscle tissue. It is directly involved in protein synthesis, helping to preserve lean muscle mass while also maintaining the body’s nitrogen balance. During periods of physical stress or intense exercise, L-Leucine provides a critical energy source and helps preserve glycogen levels in the muscles, ensuring ongoing endurance and performance. Key highlights include:

  • Essential for protein synthesis and muscle repair.
  • Helps maintain nitrogen balance in the body.
  • Provides energy and preserves muscle glycogen during intense physical activities.

Common Dosage

The common dosage range for L-Leucine is between 2000 mg and 5000 mg. This dosage can vary based on individual health goals, the intensity of physical activity, and dietary intake.


L-Leucine is an indispensable amino acid with a critical role in muscle maintenance, energy provision, and overall metabolic health. It is an essential component for athletes, individuals engaged in regular physical activity, and those recovering from medical conditions requiring muscle preservation. Here are the key takeaways:

  • Found in a variety of dietary sources and supplements.
  • Essential for protein synthesis, muscle repair, and energy provision.
  • Common dosage ranges from 2000 mg to 5000 mg, depending on individual needs and goals.

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