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L-Leucine USP,JP

L-Leucine,L-Leucine USP,CAS 61-90-5,Amino acids

Product Category

L-Leucine USP

L-Leucine USP,JP

CSA: 61-90-5

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Product Name: L-Leucine
Color: white crystals or crystalline powder
Molecular Formula: C6H13NO2
Molecular Weight: 131.18
EINECS NO: 200-522-0
Package: 25KG/Drum,25kg/bag
Quality Standards: USP, AJI

Supplier: Joylife Nutripharma Inc

E-mail: sales1@joylifenutripharma.com

Whatsapp: +8615084905292

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Product Overview

Introduction of L-Leucine

Leucine, also known as L-leucine, was first isolated from cheese by Proust in 1819. Later, Braconnot obtained it in crystalline form from the acid hydrolysates of muscle and wool and named it leucine. L-Leucine is an essential amino acid that the human body cannot synthesize on its own and must be obtained from food. It belongs to the branched-chain amino acid (BCAA) family and, together with isoleucine and valine, forms the "golden triangle" of muscle repair.

Related Derivatives

Variant Description / Key Features Applications / Functions
L-Leucine Chemical name: 2-Amino-4-methylpentanoic acid; side chain: isopropyl group (-CH(CH₃)₂) attached to the γ-carbon; essential BCAA. Promotes muscle protein synthesis via mTOR activation; regulates blood glucose; supports post-exercise recovery and muscle repair.
L-Isoleucine Chemical name: α-Amino-β-methylvaleric acid; side chain: methyl group (-CH₃) attached to the β-carbon; another essential BCAA, distinct from leucine. Involved in fat metabolism and energy utilization; supports intestinal health and immune function.
D-Leucine Enantiomer (mirror image) of L-leucine; non-natural amino acid. Exhibits anticonvulsant activity; used as a nutritional supplement for muscle recovery and glycemic control.
N-Acetyl-L-Leucine Acetylated derivative of L-leucine; modification on the amino group. Altered chemical and biological properties; applied in drug development and biochemical research.
N-Acetyl-D-Leucine Acetylated form of D-leucine; combines chirality with acetylation. Potential unique biological or pharmacological activities; used in specialized research settings.
Glycyl-L-Leucine Dipeptide formed by glycine and L-leucine via a peptide bond. May play a role in protein synthesis or cellular signaling; used in peptide studies.
N-Carbobenzoxy-L-Leucine L-leucine derivative with a carbobenzoxy (Cbz) protecting group on the amino group. Commonly used in organic synthesis and peptide assembly to prevent unwanted side reactions.

Sample Specification

Pls feel free to contact us to get Standard COA & Specification of L-Leucine .

Item Specification
Appearance White crystalline or crystalline powder
Identification Infrared Absorption
Specific rotation [α]D20 ﹢14.9°to ﹢17.3°
pH 5.5 to 7.0
Loss on drying Not more than 0.2%
Residue on ignition Not more than 0.4%
Chloride（Cl） Not more than 0.05%
Sulfate(SO4) Not more than 0.03%
Iron(Fe) Not more than 30ppm
Heavy metals Not more than 15ppm
Lead Not more than 3ppm
Arsenic(as As2o3) Not more than 1ppm
Mercury Not more than 0.1ppm
Cadmium Not more than 1ppm
Chromatographic purity As per usp32
Organic    volatile impurities As Per usp32
Assay 98.5% to 101.5%
Total Plate Count Not more than 1000cfu/g
Yeast and Mould Not more than 100cfu/g
E.Coli Negative
Salmonella Negative
S.aureus Negative

Sports Nutrition

1. Muscle repair and growth: Activates the mTOR signaling pathway, promotes muscle protein synthesis, reduces post-exercise muscle damage, and helps athletes and fitness enthusiasts recover strength and increase muscle mass.
2. Anti-fatigue: Participates in energy metabolism, delays exercise-induced fatigue, and improves athletic performance.

Food & Beverage Nutrition

1. Nutritional fortification: Added to infant formula, nutritional products for the elderly, and foods for special medical purposes to supplement essential amino acids, supporting growth, development, and overall health.
2. Flavor enhancement: Used as a flavoring agent to improve the taste and palatability of food products, commonly found in bread, pasta, and other flour-based items.

Animal Nutrition

1. Growth promotion: Improves feed conversion rates, promotes the growth of livestock and poultry, increases lean meat percentage, and enhances meat quality.
2. Immune enhancement: Boosts animal immunity, reduces disease incidence, and improves breeding efficiency.
3. Reproductive performance optimization: Positively influences reproductive function in animals and increases breeding success rates.

Cosmetics & Skincare

1. Anti-aging and skin nourishment: Serves as a raw material for collagen synthesis, improves skin elasticity and radiance, and delays skin aging.
2. Repair and hydration: Promotes skin cell repair, strengthens the skin barrier function, and maintains skin moisture.
3. Immune regulation: Supports immune cell proliferation and function, enhances the body's resistance, and reduces the risk of infection.

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