The company focuses on vitamins, amino acids, plant extracts, sweeteners and other series of products, which have been widely used in food, health food, cosmetics, feed, veterinary medicine and other industries.
Products
High Purity L-Tyrosine Powder | ≥98.5% Feed, Food & Supplement Grade | CAS 60-18-4
Description:
Product Overview
L-Tyrosine is a conditionally essential aromatic amino acid that plays a fundamental role as a precursor to key neurotransmitters and hormones. In the brain, it is the direct precursor for dopamine, norepinephrine, and epinephrine — neurotransmitters critical for mood, focus, stress response, and cognitive function under demanding conditions . Beyond the nervous system, L-tyrosine is also a precursor for thyroid hormones (thyroxine) and the skin pigment melanin .
Unlike essential amino acids, the body can synthesize tyrosine from phenylalanine via the enzyme phenylalanine hydroxylase. However, under conditions of stress, cognitive load, or when phenylalanine intake is limited, dietary or supplemental tyrosine becomes important .
At Henan Liyin Biotech, we supply high-purity L-Tyrosine in the form of a white to off-white crystalline powder, with a minimum purity of ≥98.5% (typically 98.5–101.5%), compliant with USP, EP, and FCC standards . Our product is available in Feed Grade, Food Grade, and Supplement Grade to serve applications across animal nutrition, dietary supplements, food fortification, and personal care.
Why Choose Our L-Tyrosine?
Verified Purity: Assay ≥98.5% (typically 98.5–101.5% by HPLC)
Multi-Standard Compliance: Meets FCC, USP, and EP specifications for global regulatory acceptance
Proven Safety for Animal Nutrition: EFSA has concluded that L-tyrosine remains safe for target species, consumers, and the environment as a nutritional feed additive
Complete Traceability: Each batch is accompanied by a comprehensive Certificate of Analysis (COA)
Flexible Packaging: Available in packaging options from 1kg to bulk quantities
Key Functional Properties
Cognitive Performance & Stress Support
L-Tyrosine has been shown to enhance cognitive performance during short-term, stressful, or cognitively demanding situations. It works by increasing dopamine synthesis in the brain, counteracting reductions in working memory and information processing that occur during demanding periods. Studies show that L-tyrosine improves reaction time — a key marker of cognitive function — and is most effective as an acute intervention rather than a daily supplement .
Optimal use cases include:
Acute cognitive stress (exams, high-stakes presentations, complex problem-solving)
Sleep deprivation or fatigue
Extreme environmental conditions (cold exposure, physical stress)
Demanding work periods
Neurotransmitter & Hormone Precursor
L-Tyrosine serves as the primary building block for:
Dopamine: Regulates mood, motivation, and reward
Norepinephrine & Epinephrine: Key neurotransmitters in the sympathetic nervous system, important for stress response and alertness
Thyroid hormones (thyroxine): Regulates metabolism
Melanin: The major human pigment responsible for skin, hair, and eye color
Dual Role: Non-Essential Under Normal Conditions, Essential Under Stress
While the body can synthesize tyrosine from phenylalanine, supplementation becomes valuable when:
The phenylalanine-to-tyrosine conversion pathway is overwhelmed
Individuals with certain genetic variants (DRD2 gene) show greater benefits from supplementation due to lower baseline dopamine levels
Cognitive reserves are depleted during stressful periods
Effects on Cognitive Fatigue
L-tyrosine supplements are used to help decrease cognitive fatigue due to physically stressful situations such as extended wakefulness, exposure to cold, and excessive noise . It may also improve working memory in multitasking environments .
Quality Assurance & Documentation
All batches undergo rigorous quality control, including:
Assay by HPLC: ≥98.5% (typically 98.5–101.5%)
Heavy Metal Screening: Lead ≤ 5 mg/kg
Optical Rotation: Verified against FCC/USP specifications
Loss on Drying and Residue on Ignition: To ensure stability and purity
We provide complete documentation with every shipment, including Certificate of Analysis (COA), Material Safety Data Sheet (MSDS), and Allergen Statement. Our GMP-certified production ensures batch-to-batch consistency and traceability.
Sourcing Support
We offer flexible packaging and can provide samples for pre-shipment testing. Our technical team is available to assist with grade selection (Feed, Food, or Supplement Grade), application guidance, and custom formulation support — from R&D trials to full-scale commercial production.
Contact us to discuss your specific L-Tyrosine requirements or to request samples for your formulations.
Parameters:
-
Parameter
Specification
Product Name
L-Tyrosine
CAS Number
60-18-4
Molecular Formula
C₉H₁₁NO₃
Molecular Weight
181.19 g/mol
Assay (Purity)
≥ 98.5% (typically 98.5–101.5% )
Appearance
White to off-white crystalline powder
Available Grades
Feed Grade, Food Grade, Supplement Grade
Standards
USP, EP, FCC
Specific Rotation
[α]²⁰/D -10.0° to -11.0°
Melting Point
> 300°C (decomposes)
Loss on Drying
≤ 0.3%
Residue on Ignition
≤ 0.1%
Lead (Pb)
≤ 5 mg/kg
Water Solubility
0.45 g/L at 25°C
Packaging Options
1kg, 5kg, 25kg (or as per request)
Documentation
Full COA, MSDS, Allergen Statement
Storage Conditions
Store in a cool, dry place at ambient temperature. Stable under recommended storage.
-
Dietary Supplements
L-Tyrosine is a popular ingredient in supplements targeting cognitive performance, stress support, and focus. Its role as a dopamine and norepinephrine precursor makes it valuable for:
Cognitive Enhancement: Supports mental clarity, focus, and working memory, particularly under high-stress or multitasking conditions
Stress Support: May help counteract the depletion of neurotransmitters during periods of acute stress
Sleep Deprivation & Fatigue: Helps maintain cognitive function when sleep is compromised
Mood Support: Supports healthy mood through its role in dopamine and norepinephrine pathways
Effective Dosage: Studies typically use doses around 150 mg/kg body weight (approximately 10g for a 70kg person) for acute effects, taken 15–60 minutes before the demanding situation. Effects last approximately 1–3 hours . Supplementation levels vary by intended use; consult appropriate guidelines for specific applications.
Food & Beverage
L-Tyrosine is used in food applications as a nutritional supplement and flavoring agent (FEMA 3736) .
Key Applications
Nutritional Fortification: Used to enhance the amino acid profile of processed foods and protein-based products
Flavoring Agent: Contributes to taste development in processed products; when heated with sugars, produces unique flavor compounds via the amino-carbonyl reaction
Clinical Nutrition: Used in specialized nutrition formulas
Regulatory Status: FCC grade is suitable for food, beverage, and nutritional supplement applications .
Animal Feed
L-Tyrosine is authorized as a nutritional feed additive for all animal species (3c401). The EFSA Panel on Additives and Products or Substances used in Animal Feed has concluded that the use of L-tyrosine in animal nutrition remains safe for target species, consumers, and the environment .
Key Applications
Nutritional Supplement: Provides a source of tyrosine in animal diets where phenylalanine conversion may be limited
Stress Management: Supports neurotransmitter production during periods of stress in livestock
Broad Species Use: Authorized for use in all animal species
Safety Profile: L-tyrosine is not an irritant to skin or eyes. As with all feed additives, appropriate handling precautions should be observed .
Personal Care & Cosmetics
L-Tyrosine is used in personal care formulations for its hair-conditioning, skin-conditioning, antistatic, and fragrance properties .
Key Applications
Hair Conditioning: Used in hair care products to support hair health
Skin Care: Functions as a skin-conditioning agent. In suntan accelerators and skin-bronzing cosmetics, it penetrates the epidermis to the basal layer where melanocytes are located, used to accelerate the tanning process
Antistatic Agent: Reduces static electricity in hair and skin formulations
Fragrance: May contribute to product fragrance profiles
Formula Compatibility: Stable in topical formulations and compatible with a wide range of cosmetic ingredients. Not an irritant to skin or eyes .
Key words:
High Purity L-Tyrosine Powder | ≥98.5% Feed, Food & Supplement Grade | CAS 60-18-4
Function:
Application：
Dietary Supplements
L-Tyrosine is a popular ingredient in supplements targeting cognitive performance, stress support, and focus. Its role as a dopamine and norepinephrine precursor makes it valuable for:
Cognitive Enhancement: Supports mental clarity, focus, and working memory, particularly under high-stress or multitasking conditions
Stress Support: May help counteract the depletion of neurotransmitters during periods of acute stress
Sleep Deprivation & Fatigue: Helps maintain cognitive function when sleep is compromised
Mood Support: Supports healthy mood through its role in dopamine and norepinephrine pathways
Effective Dosage: Studies typically use doses around 150 mg/kg body weight (approximately 10g for a 70kg person) for acute effects, taken 15–60 minutes before the demanding situation. Effects last approximately 1–3 hours . Supplementation levels vary by intended use; consult appropriate guidelines for specific applications.
Food & Beverage
L-Tyrosine is used in food applications as a nutritional supplement and flavoring agent (FEMA 3736) .
Key Applications
Nutritional Fortification: Used to enhance the amino acid profile of processed foods and protein-based products
Flavoring Agent: Contributes to taste development in processed products; when heated with sugars, produces unique flavor compounds via the amino-carbonyl reaction
Clinical Nutrition: Used in specialized nutrition formulas
Regulatory Status: FCC grade is suitable for food, beverage, and nutritional supplement applications .
Animal Feed
L-Tyrosine is authorized as a nutritional feed additive for all animal species (3c401). The EFSA Panel on Additives and Products or Substances used in Animal Feed has concluded that the use of L-tyrosine in animal nutrition remains safe for target species, consumers, and the environment .
Key Applications
Nutritional Supplement: Provides a source of tyrosine in animal diets where phenylalanine conversion may be limited
Stress Management: Supports neurotransmitter production during periods of stress in livestock
Broad Species Use: Authorized for use in all animal species
Safety Profile: L-tyrosine is not an irritant to skin or eyes. As with all feed additives, appropriate handling precautions should be observed .
Personal Care & Cosmetics
L-Tyrosine is used in personal care formulations for its hair-conditioning, skin-conditioning, antistatic, and fragrance properties .
Key Applications
Hair Conditioning: Used in hair care products to support hair health
Skin Care: Functions as a skin-conditioning agent. In suntan accelerators and skin-bronzing cosmetics, it penetrates the epidermis to the basal layer where melanocytes are located, used to accelerate the tanning process
Antistatic Agent: Reduces static electricity in hair and skin formulations
Fragrance: May contribute to product fragrance profiles
Formula Compatibility: Stable in topical formulations and compatible with a wide range of cosmetic ingredients. Not an irritant to skin or eyes .
About Us
Henan Liyin Biotech Co.,Ltd
We are is established in 2024,located in Zhengzhou,on the banks of the Yellow River-the revered “Mother River “of China .As a specialized supplier of human nutrition and animal health products ,the company focuses on a range of products including vitamins ,amino acids ,plant extracts ,and sweeteners,which are widely used in industries ,such as food ,health supplements,cosmetics ,feed and veterinary medicine .By integrating global product resources with the needs of international clients ,Liyin Biotech provides premium products and professional services tailored to each customer .
FAQ
How to contact ?
You can contact with us by Whatsapp:+86 15824830539, the Average Response Time is 0-4h on Work time, <24h on Non-worktime.
For every inquiry, our sales will provide the one-for-one service for you.
How about the payment terms ?
Normal orders: Company account ;Sample/small orders: Paypal(The 5-10% extrafee).About the payment term, we will negotiate alone.
How to get the samples ?
At the first time ,we can provide you the normal product <30g free sample
How to confirm the Product Quality before placing orders?
1st, you can get free samples for some products, just paythe basic cost for us.
2nd,Also you can send the specification or your quest tous, we will customize the products for you.3rd,We emphasis that our whole company make a livingwith organic chemical and customers, we absolutelyimpossible to sale any fake goods, unqualified goods, it isshame! And None False certificate/lie/illegal thing in oursales net!
Which kind of payment do you accept?
- As usually we use company account ,T/T in advance ,or at least 30% T/T in advance ,the balance can be paid by the copy of B/L
- For some countrys we can accept L/C at sight & DP at sight
- For smaples we can use Paypal (The 5-10% extra fees) or other ways
About the payment term, we will negotiate alone.
How about the shipment ?
1>For bulk goods ,we can use contaioner by sea ,1&20 and 1&40 contaioner
2>For urgently and expensive goods ,we can arrange the air lines for customers choose ,or can as customer required
3>For samples or small quantity goods ,we can use Fedex or other express ways
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As a specialized supplier of human nutrition and animal health products ,the company focuses on a range of products including vitamins ,amino acids ,plant extracts ,and sweeteners,which are widely used in industries ,such as food ,health supplements,cosmetics ,feed and veterinary medicine .
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