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DL-Methionine
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DL-Methionine Overview
DL-Methionine is a vital sulfur-containing amino acid used in modern feed nutrition.
As animals cannot synthesize sufficient methionine, supplementation is required to support
optimal growth rate, feed conversion efficiency, and protein deposition.
Our DL-Methionine complies with GB/T 17810-2009 Feed Grade standards and shows excellent purity,
flowability, and stability, making it suitable for all types of compound feeds, premixes, and concentrates.
DL-Methionine is commonly used together with other essential amino acids such as L-Lysine and L-Valine to achieve optimal amino acid balance.
Product Information
• Active Ingredient: DL-Methionine, Feed Grade 99%
• Grade: Feed Additive Amino Acid
• Appearance: Almost white crystalline powder or small flakes
• Standard Compliance: GB/T 17810-2009 (Feed Grade) according to COA
• Functions in Nutrition:
– Supplies essential sulfur-containing amino acid
– Supports muscle growth and protein synthesis
– Improves feed efficiency and weight gain
– Helps maintain feather growth and immune function in poultry
• Shelf Life: 36 months (per COA batch information)
• Storage: Store in a cool, dry, ventilated area away from direct sunlight.
Technical Specifications
| Appearance | White or almost white crystalline powder / small flakes |
| Assay (DL-Methionine) | ≥99.0% (COA result: 99.6%) |
| Loss on Drying | ≤0.5% (COA result: 0.04%) |
| Standard | GB/T 17810-2009 Feed Grade |
| Shelf Life | 36 months (per COA) |
Reference: National Research Council (NRC) – Nutrient Requirements of Poultry
Quality Assurance
Our DL-Methionine is manufactured under controlled conditions and tested according to GB/T 17810-2009.
Quality control includes:
• Assay (purity) verification
• Appearance and physical properties
• Loss on drying
• Compliance with feed-grade amino acid standards
• Batch traceability and COA documentation
Each batch is supplied with a complete Certificate of Analysis to ensure consistency and reliability.
Applications & Dosage
DL-Methionine is used across poultry, swine, ruminants, and aquaculture feed formulations
to achieve balanced amino acid profiles.
Typical Inclusion Rates (for reference only; final formulation should follow nutritionist recommendations):
• Poultry: 0.15–0.40% of total feed
• Swine: 0.10–0.30% of total feed
• Aquaculture: 0.20–0.50% depending on species
• Ruminants: According to bypass formulation needs
Proper dosage optimizes protein utilization, reduces nitrogen excretion, and improves overall performance.
Product FAQ
1. What does DL-Methionine do in animal feed?
DL-Methionine provides a highly digestible source of sulfur-containing amino acids. It improves growth rate, supports protein synthesis, enhances feed efficiency, and helps maintain feather development and immune performance in poultry and livestock.
2. What is the function of DL-Methionine in feed formulations?
DL-Methionine corrects limiting amino acid levels in compound feeds. It allows nutritionists to balance amino acid profiles, reduce crude protein levels, optimize feed cost, and maintain consistent production performance across species.
3. Can animals safely consume DL-Methionine?
Yes. DL-Methionine is widely used in commercial poultry, swine, ruminant, and aquaculture feeds. Animals efficiently convert the D-isomer to the biologically active L-form, making DL-Methionine fully suitable and safe for feed applications.
4. Does DL-Methionine affect feed acidity or digestion?
DL-Methionine can slightly influence dietary acidity due to its chemical structure, but its inclusion rates in feed are low and do not cause harmful effects. Instead, it supports normal digestive function by improving amino acid utilization.
5. What packaging formats are available for DL-Methionine?
DL-Methionine is commonly supplied in 25 kg bags, laminated kraft bags, or jumbo bags depending on manufacturer specifications. All packaging is designed to maintain stability, flowability, and protection during transport and storage.
Q1. How can I request a quotation or sample?
You can click the “Send Inquiry” button on this page or email us directly at [email protected].
Samples are available for most products, and our sales team will reply within 24 hours with detailed pricing and documentation .
Q2. What is the minimum order quantity (MOQ)?
The MOQ is 0.5 kg for most products.
For laboratory evaluation or small trial batches, smaller quantities can be arranged depending on stock availability.
Q3. What certifications do your products comply with?
Our GMP-certified partners operate under ISO, CEP, and FSC standards.
Each batch is supplied with a full set of COA, MSDS, and export documents to ensure quality traceability.
Q4. How long does delivery take?
Usually 3–7 working days for available stock and 2–3 weeks for customized specifications or large orders.
Q5. Which payment methods do you accept?
We accept T/T, L/C, and other agreed terms depending on the order volume and region.
Q6. Can you provide contract manufacturing or custom formulation support?
Yes. We cooperate with multiple GMP facilities to offer custom synthesis, formulation, and registration support for specific markets.
Packaging Information
Standard packing: 25 kg fiber drum or 1 kg foil bag
Double PE inner liner for moisture protection
Custom packaging available on request
Storage & Stability
Store in a cool, dry environment away from direct light. Shelf life 24 months under recommended conditions.
Transportation
Shipped by air, sea, or express according to customer preference. Dangerous goods comply with IATA/IMDG standards if applicable.
Our company and partner facilities hold valid GMP and ISO certificates issued by national authorities, ensuring that every batch meets strict quality and traceability standards required for international veterinary API markets.
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