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Views: 0 Author: Site Editor Publish Time: 2026-03-18 Origin: Site
L-lysine hydrochloride 98.5% feed-grade plays an important role in animal life. It can participate in protein synthesis, promote the growth of various animals, speed up the slaughter, regulate immunity, improve resistance, avoid stress, promote acid-base balance, protect the intestinal health of animals, regulate metabolism, improve meat quality, and provide synergistic and complementary nutrition.
1. Basic Definition and Nutritional Value
L-Lysine hydrochloride is a basic essential amino acid and the first limiting amino acid in the feed of livestock, poultry, and aquatic animals (most easily deficient in corn-soybean meal basal diets). Animals cannot synthesize it themselves and it is crucial for animals, especially monogastric animals (such as pigs and poultry), and must be supplemented exogenously through feed.
As a core feed additive, lysine plays a key role in protein synthesis and is also involved in various physiological processes such as immune regulation, acid-base balance maintenance, and lipid metabolism. Therefore, L-lysine hydrochloride 78.5% is one of the most important core feed additives in modern large-scale farming.
It plays an irreplaceable role in improving feed utilization, reducing farming costs, and improving animal growth performance and product quality, and is widely used in feed production for all farmed species, including pigs, poultry, aquatic animals, and ruminants.
2. Understanding the Identification Standards and Product Types of L-Lysine Hydrochloride
(1) Identification Standards for High-Quality Lysine
When selecting feed-grade L-lysine hydrochloride, you need to understand the characteristics of a high-quality product. Not all products are of the same quality, and this difference can impact your animal health and your company's production budget. Most lysine used in feed is L-lysine hydrochloride, with a content ≥78.5% (the hydrochloride itself has a purity ≥98.5%, and due to the approximately 20% chloride ion content, the effective lysine content is approximately 78.5%).
This product typically:
Is a light brown powder with good flowability.
It is easily mixed into feed formulations.
It is highly water-soluble, which aids in animal absorption.
It remains stable under suitable storage conditions (cool, dry place).
The CAS number for L-lysine hydrochloride is 657-27-2, which is its unique identifier in the chemical field. Understanding these specifications helps distinguish genuine products from inferior ones. Currently, many customers are bulk purchasing feed or additives for the next quarter. Many customers only care about the price and may end up buying low-purity or even counterfeit products. It is essential to choose a reliable company, such as Polifar, a supplier with many years of experience in feed additives.
(2) Lysine Product Types
Due to the high hygroscopicity of pure L-lysine in industrial production, it is mostly processed into hydrochloride/sulfate forms, which are the mainstream products in the feed industry. A small number of coated products are available to meet specific aquaculture needs. The specific classifications are as follows:
| Product Type | Core Ingredients | Lysine content: | Features | Application Scenarios |
| L-Lysine Hydrochloride | L-Lysine · HCl | ≥78.5% (National standard minimum requirement) | Good stability, low hygroscopicity, moderate cost, mainstream in industrial production | Conventional feed for pigs, poultry, and aquatic animals, accounting for over 90% of the market. |
| L-Lysine Sulfate | L-Lysine + Sulfate + Small Amount of Amino Acid Byproducts | ≥65% (available lysine) | High cost-effectiveness, contains sulfur, can synergistically supplement methionine | Basic feed for medium and large-sized pigs, late-stage broilers, and ruminants. |
| Coated Lysine | Regular Lysine + Microcapsule Coating Layer | Determined by coating process (maximum ≥70%) | Resistant to rumen breakdown, slow-release absorption | Specialized feed for cattle, sheep, and other ruminants. |
| High-Purity L-Lysine Crystal Powder | Pure L-Lysine | ≥98.5% | 100% bioavailability, few impurities | Feed for young animals (piglet, chick) and high-end specialty livestock. |
(3) Quality Certifications
Top suppliers like Polifar provide authoritative certifications for their products:
ISO 9001:2015
ISO 22000:2018
FDA
FMAS-0996
HALAL
and other regional or industry-specific certifications.
All these certificates demonstrate that the Polifar group strictly adheres to relevant regulations during the product manufacturing process. Buyers should review the Certificate of Analysis (COA) and Material Safety Data Sheet (MSDS) before purchasing. These documents clearly show the specific information contained in the product you are buying.
Detection for heavy metals, microorganisms, and other harmful substances is also crucial. High-quality L-lysine hydrochloride should contain very low levels of these substances, within national standards, to ensure animal safety and ensure food safety in the finished product reaching the market.
3. What are the roles and functions of L-lysine hydrochloride as a feed additive?
Lysine functions around three core areas: amino acid supplementation, physiological regulation, and metabolic regulation. It is both a basic nutrient and an important regulator of bodily physiological activities. Its core functions are as follows:
(1) Participation in protein synthesis
Lysine is the first limiting amino acid in pigs and the second limiting amino acid in poultry (after methionine). Lysine is a key nutrient for the synthesis of all proteins in animal muscles, organs, tissues, hair, and embryos. Lysine supplementation effectively avoids nutrient deficiencies, improves the utilization efficiency of other amino acids, and significantly increases overall protein utilization. Adding lysine to feed can reduce the crude protein content by 1-3 percentage points, enabling low-protein diet formulation, reducing the use of high-protein raw materials such as soybean meal, significantly reducing feed costs, and simultaneously reducing nitrogen excretion from animals, thus reducing pollution in the farming environment.
(2) Promoting animal growth and accelerating market weight
Lysine directly regulates growth hormone secretion, promotes skeletal and muscle development in young animals, accelerates muscle deposition in medium and large animals, and improves feed palatability. Research data shows that supplementing piglets with an appropriate amount of lysine in their diet can increase daily weight gain by 10%-15% and improve feed conversion rate by 8%-12%; for broiler chickens, supplementation can shorten the breeding cycle by 2-3 days and reduce the feed conversion ratio by 0.1-0.2.
(3) Regulating immunity, improving resistance, and avoiding stress
Lysine is an important component of immunoglobulins and immune cells. Supplementation can significantly increase the body's immunoglobulin content and enhance immune cell activity; at the same time, it can alleviate metabolic disorders caused by stress such as weaning, regrouping, and temperature changes, reducing stress-induced growth inhibition and mortality.
(4) Acid-base balance and protecting intestinal health
As a basic amino acid, lysine can neutralize excess acidic substances in the intestine, adjusting the intestinal pH to a suitable range for digestive enzyme activity (6.0-7.0 for pigs, 6.5-7.5 for poultry), optimizing nutrient absorption. Simultaneously, a suitable acid-base environment can promote the reproduction of beneficial bacteria, inhibit the growth of harmful bacteria, and maintain the integrity of the intestinal mucosal barrier.
(5) Metabolic Regulation, Quality Improvement
Regulating fat metabolism: Promotes the oxidation and decomposition of fatty acids in the liver, increases lean meat percentage, reduces abdominal fat percentage, and improves carcass quality;
Enhancing product nutrition: Supplementing laying hen and dairy cow feed can significantly increase the protein content in eggs and milk;
Protecting aquatic liver: Alleviates liver damage caused by high-fat and high-meal-content feeds, and reduces the incidence of fatty liver.
(6) Synergistic Nutrition, Complementary Enhancement
Lysine can be combined with methionine, threonine, etc., according to the ideal amino acid pattern to achieve amino acid balance; combined with calcium and phosphorus, it can promote calcium absorption and bone calcification; combined with probiotics and enzyme preparations, it can further improve nutrient utilization, which is in line with the concept of environmentally friendly aquaculture.
4. Application guidelines for L-lysine hydrochloride in different farmed species
(1) Recommended dosage levels
The appropriate dosage will vary depending on the animal species, growth stage, and other components in the feed:
| Animal Type | Growth Stage | Typical Inclusion Rate (%) |
| Swine | Weaner | 0.8-1.2 |
| Swine | Grower | 0.7-0.9 |
| Swine | Finisher | 0.6-0.8 |
| Broiler | Starter | 0.9-1.1 |
| Broiler | Grower | 0.8-1.0 |
| Broiler | Finisher | 0.7-0.9 |
| Layer | Production | 0.7-0.8 |
(2) Dosage of L-Lysine Hydrochloride Feed Grade in Different Animals
A: Pigs
Lysine is the first limiting amino acid in pig feed. The requirement varies greatly at different growth stages, with young pigs having the highest requirement, which decreases slightly in the later stages of fattening. Recommended dosage:
Piglets (1-10kg): 0.9%-1.2% to alleviate weaning stress and promote growth;
Nurse pigs (10-30kg): 0.7%-0.9% to increase feed intake and reduce diarrhea rate;
Growing pigs (30-100kg): 0.5%-0.7% to promote muscle deposition and increase lean meat percentage;
Sows (pregnant/lactating): 0.6%-0.7% for pregnant sows; 0.8%-0.9% for lactating sows to increase milk production and improve piglet birth weight and survival rate.
B: Poultry (Chickens, Ducks, Geese)
Poultry's demand for lysine is second only to methionine (though it's the first limiting factor for some breeds). Laying hens have the highest demand during their laying period, and broilers during their brooding period. Recommended addition levels:
Broilers:
Brooding period (1-21 days): 0.9%-1.0%; Finishing period (22-42 days): 0.7%-0.8%, reducing feed conversion ratio and shortening the rearing cycle.
Laying hens (laying period): 0.6%-0.7%, increasing egg production rate, prolonging peak laying period, and increasing egg protein content.
Ducks/Geese:
Brooding period: 0.8%-0.9%; Finishing period: 0.6%-0.7%, reducing abdominal fat percentage and increasing carcass percentage.
C: Ruminants (Cattle, Sheep)
The rumen microorganisms in ruminants such as cattle and sheep can synthesize a small amount of lysine, but high-yielding breeds (dairy cows, fattening beef cattle) cannot synthesize enough on their own and need to be supplemented with coated lysine (ordinary lysine is decomposed by rumen microorganisms and loses its activity). Supplementation guidelines:
Dairy Cows: High-yielding dairy cows with a daily milk production ≥30kg can increase milk production by 3%-5% and improve milk protein content by supplementing with 50-60g of coated lysine daily.
Fattening Beef Cattle/Sheep: Supplementing with 0.3%-0.4% coated lysine promotes muscle deposition and reduces breeding costs.
Heifers/Sheep: Supplementing the basal diet with 0.2%-0.3% ordinary lysine helps with bone and body development.
D: Aquatic Products (Fish, Shrimp, Crab)
Aquatic animals cannot synthesize lysine themselves, making it the first limiting amino acid in aquatic feed. Demand increases significantly under high-density farming conditions. Recommended lysine addition:
Freshwater Fish (Grass Carp, Common Carp, Tilapia): Juvenile fish 1.0%-1.2%, Adult fish 0.8%-0.9%, to improve feed utilization and reduce liver damage;
Marine Fish/Shrimp (Litopenaeus vannamei, Large Yellow Croaker): Lysine addition 1.2%-1.5%, to improve molting and growth efficiency, enhance stress resistance, and reduce mortality in high-density farming.
E: Specialized Aquaculture (Pets, Fur Animals, Rare Birds)
Pets (Dogs, Cats): Puppies/Kittens 0.8%-1.0%, Adult Dogs/Cats 0.6%-0.7%, to promote hair and muscle development and enhance immunity;
Fur Animals (Fox, Raccoon Dog): Lysine addition during growth period... 0.9%-1.1% promotes feather growth, increasing feather density and luster;
For rare poultry (pigeons, quails): Lysine supplementation of 0.7%-0.8% improves egg production and chick survival rate.
Specific feeding amounts vary greatly among different animals. Please consult the Polifar professional team before purchasing to understand the specific needs of your animal.
(3) Combination with Other Amino Acids
L-Lysine works best when used in balance with other amino acids:
L-Threonine: Usually the second limiting amino acid after lysine.
DL-Methionine 99%: Synergistically works with lysine for optimal protein utilization.
DL-Methionine 50%: An alternative form for specific formulations.
(4) Combination with Several Other Additives
Lysine hydrochloride cannot be used alone; it is part of a complete nutritional program. Here are how it works synergistically with other feed ingredients:
Choline Chloride 60%: Supports metabolism and fat transport.
Feed Yeast: Provides B vitamins and improves digestion.
Dicalcium Phosphate: Provides calcium and phosphorus for bone development.
Farms typically employ a balanced approach using multiple additives rather than focusing on a single nutrient, with significant results. When all nutrients are adequately supplied, animals can absorb them better and faster, improving meat quality.
(5) Feed Formulation Strategies
This section highlights and details the recommended dosage of lysine, helping you to add it more precisely.
Precision Nutrition: Adding the appropriate amount of lysine to meet needs and avoid waste.
Phase-based Feeding: Adjusting lysine levels as the animal grows.
Ideal Protein Concept: A balanced ratio of all amino acids to lysine.
These strategies help pigs achieve higher growth rates while reducing feed and cost inputs.
(6) Mixing and Storage Precautions
For best results:
Mix thoroughly to ensure even distribution in the feed.
Do not heat during mixing (it will destroy the amino acids).
Store in a cool, dry place.
Use within the specified shelf life.
5. L-Lysine Hydrochloride Market Trends and Data
Understanding market trends will help you make informed purchasing decisions. The L-lysine hydrochloride market is growing, but it also faces some challenges.
(1) Market Size and Growth
Global demand for feed-grade L-lysine hydrochloride is substantial:
Current Market Size: Approximately US$314 million (2026)
Projected Growth Rate: 4.5% annually by 2032
Key Drivers: Growing Global Meat Demand
Over 80% of global lysine sales are used in animal feed. This market continues to grow as meat consumption increases in developing countries.
(2) Regional Demand and Supply
Market conditions vary across the globe:
Asia Pacific (especially China): Largest producer and consumer
North America: Strong demand driven by large-scale livestock farming
Europe: Focus on high-quality, certified products
China is a major producer of lysine, with numerous large companies capable of producing it in large quantities. The Polifar team, as a supplier with many years of experience in this field, has witnessed China become a major supplier of many feed additives, including domestically produced feed additives such as lysine.
(3) Industry Challenges
The industry faces several challenging issues:
Raw material competition: Corn and sugarcane (used to produce lysine) are also essential raw materials for food and fuel.
Price volatility: Prices can fluctuate significantly due to crop issues or energy costs.
Quality control: Some suppliers cut corners to reduce purity.
War factors: Since 2026, escalating international conflicts have impacted transportation and logistics, among other factors, affecting lysine production and prices.
6. Regulations and Safety
(1) Regulations
The official EU regulation (EU 2021/2095) approves L-lysine (base, hydrochloride and sulfate) as a feed additive for all animals, categorized as "Nutritional Additives (Amino Acids, Amino Acid Salts and their Analogs)". This authorization is valid until 2031.
Chinese standard GB 34466-2017 clearly specifies the requirements and inspection rules for L-lysine hydrochloride as a feed additive, ensuring quality control.
Another industry standard, T/CFIAS 3001-2022, specifies the technical requirements for the production and transportation of L-lysine sulfate and its fermentation byproducts.
(2) Safety
Lysine itself is a natural amino acid with high safety for animals and consumers. The European Food Safety Authority (EFSA) has assessed that the use of lysine in feed does not pose a risk of genotoxicity or long-term toxicity. Environmental Impact: Adequate lysine intake is also beneficial to environmental protection: Reduced nitrogen loss from animal feces, reduced ammonia emissions from farms, reduced land use for feed production, and higher feed conversion rates require fewer resources. Appropriate lysine supplementation can reduce nitrogen emissions and decrease the burden on the environment; improper use may lead to excessive nitrogen excretion through urine.
7. How to determine if an animal needs lysine supplementation?
The core symptoms of lysine deficiency are consistent across different farmed species, with more pronounced symptoms in young and high-producing animals. The symptoms gradually worsen with prolonged deficiency. Typical core symptoms include:
(1) Delayed growth and development
Daily weight gain is significantly reduced, feed conversion rate is low, and piglets, chicks, and juvenile fish exhibit "stunted growth" with growth rates far below normal levels;
(2) Decreased feed intake and digestive disorders
Animals experience reduced appetite and refusal to eat, accompanied by diarrhea, indigestion, damage to the intestinal mucosal barrier, and proliferation of harmful bacteria;
(3) Decreased reproductive performance
Sows have low conception rates, fewer litters, and a high rate of weak piglets; Laying hens experience a sharp drop in egg production, an increase in broken eggs, and a decrease in egg protein content; Dairy cows experience a decrease in milk production and a decrease in milk protein content;
(4) Sharp decline in immunity and stress resistance
Immunoglobulin levels are reduced, making them more susceptible to infection. Bacterial and viral diseases (such as piglet yellow-white diarrhea, Newcastle disease in chickens, and bacterial enteritis in fish and shrimp) significantly increase mortality under stress;
(5) Decreased product quality
decreased lean meat percentage, increased abdominal fat percentage, and poor carcass quality in livestock and poultry; muscle relaxation, severe liver damage, and high incidence of fatty liver in aquatic animals; dry hair, reduced density, and severe hair loss in fur-bearing animals;
(6) Abnormal skeletal development
Incomplete skeletal calcification and limb deformities in young animals (such as piglet bowlegs and chick leg weakness), making it difficult to stand and walk.
8. How to Choose a Reliable L-Lysine Hydrochloride Supplier?
(1) Focus on Supplier Qualifications
When selecting a L-lysine hydrochloride supplier, please check the following key aspects:
Product purity (minimum 98.5%);
Relevant certifications (ISO, FDA, FAMI-QS, HALAL) and intellectual property certificates;
Testing methods and frequency;
Industry experience;
Customer reviews and reputation.
(2) Polifar's Advantages
With over 10 years of experience in the feed additive business since 2013, Polifar Group offer:
Strict quality control with all necessary certifications;
Transparent production methods;
Efficient production resulting in competitive prices;
Technical support from feed experts;
A clear production flow chart showing the product's manufacturing process. This transparency is rare in the industry and provides buyers with peace of mind.
Having been in the feed additive industry for many years, we deeply understand that establishing good supplier relationships can avoid many future problems.
(3) Quality Testing and Assurance
Excellent suppliers test products at multiple stages: Raw material testing before production; In-process inspection during production; Final product inspection before shipment, with samples retained for future reference;
Polifar's testing includes: Purity testing (high-performance liquid chromatography analysis); Heavy metal screening; Microbial contamination testing; Physical asset verification. These tests ensure you get your money's worth—pure L-lysine hydrochloride provides the nutrition your animals need.
Conclusion
Feed-grade L-lysine hydrochloride is an essential tool in modern animal nutrition. It has been proven to promote animal growth, improve feed conversion ratios, and enhance animal health. Consequently, its market continues to grow globally. With rising feed costs and increasing environmental concerns, the rational use of L-lysine hydrochloride helps farmers achieve higher yields with less input.
Looking for high-quality L-lysine hydrochloride that meets all specifications and delivers consistent results? Polifar, with decades of experience, offers industry-leading products. Its L-lysine hydrochloride, with a purity of at least 98.5%, is produced under strict quality control, providing animals with the necessary nutrition while meeting farmers' high-quality demands.
Whether you raise pigs, poultry, or other livestock, appropriate lysine supplementation is one of the most cost-effective ways to improve farming efficiency. By partnering with a trusted supplier and following sound nutritional principles, you can maximize your animals' potential while controlling costs.
For more information on feed additives and how they can benefit your animals, please visit our Polifar website. We regularly update our product information.
