L-Tryptophan is an essential amino acid, crucial for the growth and development of various livestock animals such as poultry, pigs, and cattle. Tryptophan not only plays an important role in protein synthesis but also regulates several physiological functions in animals, such as enhancing immunity, promoting digestion, and improving reproductive performance.
Feed Grade L-Tryptophan 98% | |
Testing Item | Standard |
Appearance | White to light yellow crystal powder |
Assay/% | ≥98.00 |
Specific Rotation | -29.0° -32.8° |
Residue on Ignition/% | ≤0.50 |
Loss on Drying/% | ≤0.50 |
Heavy Metal(Pb)/% | ≤5 |
Arsenic(As)/% | ≤2 |
Mercury(Hg)/% | ≤0.1 |
Cadmium(Cd)/% | ≤2 |
Salmonella | Negative in 10g |
PH | 5.0~7.0 |



Feed Grade L-Tryptophan 98%
High Purity L-Tryptophan (98%+): Provides optimal nutritional support for animals.Improves Feed Conversion Ratio: Enhances protein synthesis and feed utilization efficiency.
Boosts Immunity: Supports the immune system, reducing the incidence of diseases.
Enhances Reproductive Performance: Contributes to reproductive health, increasing litter size and survival rates.
Promotes Growth and Development: L-Tryptophan is indispensable for animal growth and weight gain.
Regulates Mood and Behavior: As a precursor to serotonin, L-Tryptophan helps reduce stress responses in animals.
Optimizes Protein Utilization: Balances amino acid profiles in animal diets, working synergistically with other essential amino acids.



The recommended dosage depends on the specific feed formula and animal species, typically adding 0.05%-0.15% to the total feed.
Pig Feed: Add 0.05%-0.1%.
Poultry Feed: Add 0.05%-0.15%.
Ruminant Feed: Add 0.02%-0.05%.
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.
