L-Isoleucine is an important branched-chain amino acid widely used in animal nutrition, especially in the feed of pigs, poultry, and cattle. It is crucial for promoting growth, improving feed conversion efficiency, and enhancing immunity.
Feed Grade L-Isoleucine 90% | |
Testing Item | Standard |
Appearance | White crystals or crystalline powder |
Assay/% | 98.5%~101% |
Specific Rotation | +38.9~+41.8° |
Identification (Infrared Absorption) | Corresponding to Reference Spectrum |
Residue on Ignition/% | ≤0.30 |
Loss on Drying | ≤0.3 |
Chloride (Cl)/% | ≤0.05 |
Iron (Fe)/% | ≤0.0030 |
Sulfate ( SO4)/% | ≤0.03 |
Heavy Metal(Pb)/% | ≤0.0015 |
Arsenic(As)/% | ≤0.0003 |
Cadmium (Cd)/% | ≤0.0001 |
Mercury (Hg)/% | ≤0.0001 |
Total Plate Count(cfu/g) | ≤1000 |
Yeast and Molds(cfu/g) | ≤100 |
E.Coli | Negative in 10g |
Staphylococcus Aureus | Negative in 10g |
Salmonella | Negative in 10g |
Loss on Drying/% | ≤0.30 |
PH | 5.5~7.0 |



Feed Grade L-Isoleucine 90%
High Purity Assurance: Our isoleucine feed additive has a purity of over 90%, ensuring optimal nutrition for livestock.Promotes Muscle Development: Helps increase lean meat rates and overall growth in animals.
Improves Feed Utilization: Enhances protein absorption, leading to faster weight gain.
Boosts Immune System: Promotes immune function, reducing the risk of diseases.
Complements Amino Acid Needs: Works in synergy with other amino acids to ensure balanced nutrition.
Protein Synthesis: Isoleucine is vital for the production of proteins, which are essential for growth and repair in animals.
Energy Production: Serves as a source of energy during intense physical activity, improving overall performance.
Blood Sugar Regulation: Helps in maintaining stable blood sugar levels, contributing to better health and productivity.




Pig Feed: Add 0.05%-0.1% isoleucine per ton of feed.
Poultry Feed: Add 0.05%-0.15% isoleucine per ton of feed.
Ruminant Feed: Add 0.02%-0.05% isoleucine per ton of feed.
Aquaculture: Add 0.02%-0.05% isoleucine per ton of feed.
Dosage may vary based on specific formulations and animal requirements.
Packaging: Available in various packaging options, with a common packaging size of 25 kg bags for convenience in transportation and storage.
Storage Conditions: Store in a dry, cool place, avoiding high temperatures and moisture.
Shelf Life: The product has a shelf life of two years under appropriate storage conditions.
The Key to Enhancing Feed Quality-POLIFAR Feed Additives
In today's increasingly competitive feed industry, choosing a reliable supplier is crucial. POLIFAR proudly presents our range of feed additives, designed to provide comprehensive support for your business.
Product Overview:
Amino Acids: Optimize animal nutrition, improving growth rates and feed efficiency.
Vitamins: Ensure healthy animal development with a full range of vitamins from A to B complex.
Phosphates: Essential minerals that support the skeletal health of animals.
Trace Elements: Including iron, zinc, copper, and more, to meet the complete nutritional needs of animals.




We believe that high-quality feed additives can not only enhance the quality of your products but also bring long-term benefits to your business. We look forward to collaborating with you to create a bright future together!
For more information or to request samples, please contact our sales team. We are committed to providing high-quality products and services.
