L-threonine USP/EP/BP/JP

L-Threonine is one of the 20 standard amino acids that serve as the building blocks of proteins in the body. It is classified as an essential amino acid, meaning the human body cannot synthesize it on its own, so it must be obtained through the diet.

L-Threonine is an essential amino acid vital for building proteins, producing critical neurotransmitters, and most notably, maintaining the mucous layers that protect our gut and other tissues. It is a fundamental nutrient for structural integrity, metabolism, and immune function.

 The industrial production of L-threonine is dominated by microbial fermentation using genetically engineered microorganisms, as it is the most efficient and economical method for producing the biologically active L-isomer at scale.

Method	Raw Materials	Product Form	Main Advantages	Main Disadvantages	Current Status
Microbial Fermentation	Sugars, ammonia	Pure L-form	Lowest cost, high purity, environmentally friendly, large-scale	Relies on genetically engineered strains, complex process control	Absolute mainstream, accounts for >99% of global production
Chemical Synthesis	Petrochemical products	Racemate (requires resolution)	Well-defined route, not dependent on biology	Multiple steps, difficult resolution, high cost, not eco-friendly	Laboratory research or special applications, no industrial competitiveness
Protein Hydrolysis	Natural proteins	Pure L-form	Derived from natural protein	Very low yield, difficult separation, high pollution, uneconomical	Completely obsolete
Enzymatic/Biotransformation	Precursors or racemate	Pure L- or D-form	High stereoselectivity, mild conditions	Potential high cost of precursors/enzymes	Used for high-value products, auxiliary means for bulk production

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

Tests	Limits
Description	White crystals or crystalline powder
Identification (IR)	concordant with the reference spectrum
Assay	98.5~101.5%
pH	5.0~6.5
Specific rotation	-26.0° ~ -29.0°
Chloride (Cl)	≤0.02%
Sulfate (SO4)	≤0.02%
Iron (Fe)	≤10ppm
Loss on drying	≤0.20%
Residue on ignition	≤0.10%
Related compounds	individual impurity ≤0.5% total impurities ≤2.0%

L-Threonine is used to address specific nutritional and health needs in humans.
1. Clinical & Medical Nutrition: A component of total parenteral nutrition (TPN) solutions and critical care formulas for patients who cannot eat normally, ensuring they receive all essential amino acids.
2. Targeted Supplements: Marketed for conditions where gut health and mucous membrane integrity are concerns
3. Mental Wellness: Due to its role as a precursor to the calming neurotransmitter glycine, it is sometimes included in supplements for anxiety, sleep, or mood support.
4. General Health: Found in some protein powders, amino acid blends, and multivitamin formulations for overall wellness.

Animal Feed Additive for L-Threonine is the largest and most economically significant application. To optimize the amino acid profile in livestock and poultry feed, particularly for pigs and broiler chickens. It is modern, fast-growing breeds fed with cereal-based diets (like corn and soybean meal) are often deficient in L-threonine, which is the third or fourth limiting amino acid (after lysine and methionine) in swine and poultry nutrition.

Benefits:

1. Promotes Lean Growth: Improves protein synthesis and feed conversion efficiency (FCR), leading to better muscle development.
2. Improves Gut Health: As a critical component of mucins, supplemental threonine supports the intestinal mucosa, enhancing nutrient absorption and overall gut integrity.
3. Reduces Nitrogen Excretion: By enabling more precise diet formulation, it minimizes excess protein and nitrogen waste, reducing environmental impact.

1.Pharmaceutical Intermediates: Serves as a chiral building block for synthesizing certain drugs, including antibiotics (e.g., cephalosporins) and other active pharmaceutical ingredients (APIs) that require its specific stereochemistry.
2. Cell Culture Media: An essential component of cell culture media used in biotechnology, vaccine production, and monoclonal antibody manufacturing. It is necessary for the growth of mammalian and insect cell lines.
3. Research Reagent: Used extensively in biochemical and nutritional research to study protein metabolism, immune function, and gut physiology.