A Brief Introduction to L-Tyrosine
Molecular Formula:C9H11NO3
Molecular Weight:181.19
CAS No.:60-18-4
Appearance:Colorless or white mercerized needle-shaped crystals or crystalline powder
Regular commercial package: 25kg/drum
What is L-Tyrosine?
L-Tyrosine is a non-essential amino acid that can be synthesized by the human body. It can also be obtained from foods (it’s found in large quantities in almost all foods, with milk curds being the most readily available and easily stored source) and supplements. L-Tyrosine is partially synthesized from phenylalanine in the body. Therefore, phenylalanine can be oxidized to L-Tyrosine by phenylalanine hydroxylase when consumed. L-Tyrosine then participates in glucose and fat metabolism. With the help of vitamin B6 and iron, L-Tyrosine in the brain can also be converted into dopamine.
Applications of L-Tyrosine
Highassay adheres to strict quality control (QC) to produce L-Tyrosine. Buy L-Tyrosine in bulk from us now to get competitive market prices.
- Nutritional Supplements
Relieve fatigue, replenish energy, and enhance mental alertness. Capsules or tablets are more convenient to take.
- Pharmaceuticals
As an ingredient in infusions and medications, it is often used to treat polio and tuberculous encephalitis.
- Food Additives
Used to improve the taste of food, it is often used in beverages and dairy products.
- Beauty and Skin Care
It has antioxidant and anti-aging properties and is often added to facial care products.
Benefits of L-Tyrosine
- Improves vitiligo. In addition to being involved in protein synthesis, L-Tyrosineis also a key component of melanin formation. Increased melanin levels can help alleviate vitiligo.
- Regulates mood. L-Tyrosinepromotes the synthesis of norepinephrine, which helps regulate mood and relieve anxiety, thereby improving sleep and maintaining energy.
- Improves memory. L-Tyrosineis distributed throughout the brain and has a significant effect on improving memory and concentration. Supplementing with an appropriate amount of L-Tyrosine can improve memory, especially for those who suffer from chronic sleep deprivation.
- L-Tyrosine can help people with alcohol and drug addiction break their reliance on alcohol and drugs.
- L-Tyrosineis suitable for athletes to take before exercise, helping them maintain high energy and maintain a positive mental state.
If you have any questions about processing L-Tyrosine, Highassay’s R&D team is here to help.


L-Tyrosine Consumption Recommendations
- Before meals: Taking before meals improves absorption.
- After meals: Taking after a while after a meal helps reduce gastrointestinal stress.
- Before bed: Helps stabilize mood and improve sleep quality.
- Before exercise: Helps maintain optimal mental state.
Choose a suitable dosage and schedule based on your needs. Avoid excessive supplementation.
Specification of L-Tyrosine
L-Tyrosine | CP2020 | EP11 | USP2023 | AJI92 |
Assay | ≥99.0% | 99.0-101.0% | 98.5-101.5% | 99.0-100.5% |
PH | 5.0-6.5 | / | / | 5.0-6.5 |
Specific rotation[a]D20 | -11.3°–12.1° | -11.0°–12.3° | / | -11.3°–12.1° |
Specific rotation[a]D25 | / | / | -9.8°–11.2° | / |
Transmittance(T430) | ≥95.0% | / | / | ≥95.0% |
Appearance of solution | / | clear & colorless≤Y7 | / | / |
Chloride(Cl) | ≤0.02% | ≤0.02% | ≤0.04% | ≤0.02% |
Ammonium(NH4) | ≤0.02% | ≤0.02% | / | ≤0.02% |
Sulfate(SO4) | ≤0.02% | ≤0.03% | ≤0.04% | ≤0.02% |
Iron(Fe) | ≤10PPM | ≤10PPM | ≤30PPM | ≤10PPM |
Heavy metals(Pb) | ≤10PPM | / | / | ≤10PPM |
Arsenic | ≤1PPM | / | / | ≤1PPM |
Other amino acids | ≤0.40% | / | Individual impurities≤0.5% Total impurities≤2.0% | conform |
Ninhydrin-positive substances | / | Impurity A≤0.5% Each impurity≤0.2% Sum of impurities≤0.6% | / | / |
Loss on drying | ≤0.20% | ≤0.50% | ≤0.30% | ≤0.20% |
Residue on ignition | ≤0.10% | ≤0.10% | ≤0.40% | ≤0.10% |
Endotoxin | <0.25EU/ml | <0.25EU/ml | <0.25EU/ml | / |
Total plate count | ≤ 1000 CFU/g | ≤ 1000 CFU/g | ≤ 1000 CFU/g | ≤ 1000 CFU/g |
Moulds & Yeasts | ≤ 100 CFU/g | ≤ 100 CFU/g | ≤ 100 CFU/g | ≤ 100 CFU/g |
Groups not suitable for L-Tyrosine supplementation:
- Patients with amino acid metabolism disorders
- Patients with L-Tyrosinemia
- Patients with severe liver or kidney failure
L-Tyrosine VS N-Acetyl-L-Tyrosine
N-Acetyl-L-Tyrosine is a derivative of L-Tyrosine. L-Tyrosine is unstable and has low solubility in water. Supplementing with N-Acetyl-L-Tyrosine can improve absorption. However, depending on your needs, it is recommended to purchase a product that meets your needs.