Brief Description
CAS No.: 61-90-5 Other Names: l-2-amino-4-methylpentanoic acid MF: c6h13no2
EINECS No.: 200-522-0 Place of Origin: China (Mainland) Type: Antibiotic and Antimicrobial Agents, Anti...
Grade Standard: Cosmetic Grade, Feed Grade, Foo... Usage: Animal Pharmaceuticals Brand Name: LONGCOM
Purity: 98.5~101.0% ISO: KOSHER 

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introduction: l-leucine, commonly known as leucine, is known as one of three branch-chain amino acids. because it is an essential amino acid, humans cannot synthesize it. this means that it must be obtained through diet or supplements. some of the foods that contain l-leucine include eggs, fish, chicken, lentils, almonds and cashews, among others.


white crystals or crystalline powder



state of solution

not less than 98%

specific optical rotation

+14.9~ +16.0 degree


not more than 0.02%


not more than 0.02%


not more than 0.02%

aresenic (as203)

not more than 1ppm


not more than 10ppm

heavy metals

not more than 10ppm

other amino acids

not more than 0.50%

loss on drying

not more than 0.20%

residue on ignition

not more than 0.10%




benefits of l-leucine

l-leucine provides many benefits to the body. it is effective for maintaining blood sugar levels and also increases growth hormone production. l-leucine combines with isoleucine and valine to protect and provide fuel to the muscles, and also helps to increase your endurance level and boost energy.

other benefits of l-leucine are the preservation of lean muscle mass. this amino acid helps preserve muscle tissue, so that it doesn't break down as quickly during the aging process. l-leucine can also speed the recovery process for muscle damage and skin injuries.

l-leucine bodybuilding

l-leucine is important for the regulation of protein synthesis and is essential in the building of muscle tissue. it is found in high concentrations in the muscle tissue, and helps preserve breakdown of these tissues during endurance and long distance training.

people who are dedicated to bodybuilding often use supplements to insure that they have a sufficient level of l-leucine to help prevent tissue catabolism and to help build muscle mass. it also helps in the rebuilding of muscle tissue after intense training.

because l-leucine helps increase endurance and energy and also promotes muscle tissue health and protection, it is essential for anyone who is serious about bodybuilding.

leucine is essential for growth, stimulates the production of muscle tissue, and protects the liver from the damaging affects of alcohol. leucine is an essential amino acid, which cannot be manufactured in the body and is part of the three branched-chain-amino-acids.

leucine is a branched chain amino acid used as a source of energy. it helps reduce muscle protein breakdown. leucine modulates uptake of neurotransmitter precursors by the brain as well as the release of enkephalins, which inhibit the passage of pain signals into the nervous system. leucine promotes healing of skin and broken bones.


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