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L -Tyrosine

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L -Tyrosine

L-Tyrosine is a non-essential, aromatic amino acid with a polar side chain that plays a central role in protein biosynthesis and in the formation of key neurotransmitters. It serves as the biochemical precursor to catecholamines (dopamine, norepinephrine, epinephrine) and to thyroid hormones, making it important for neuroendocrine function and stress-responsive metabolism. 

L-Tyrosine is an effective nutritional fortificant for sports drinks, energy bars and specialized medical or dietary foods, and is particularly useful for supplementing the diets of athletes, vegetarians and other groups with elevated metabolic demands.   


PRODUCT DETAILS

Function

  • Key Precursor for Neurotransmitter Synthesis

It serves as an essential substrate for the production of dopamine, norepinephrine and epinephrine. 

L-Tyrosine supplementation alleviates cognitive decline induced by stressors 

Such as sleep deprivation, high pressure and low temperature, and sustains brain performance.

  • Endocrine and Metabolic Regulation

As the primary building block of thyroid hormones, it participates in the regulation of basal metabolic rate, 

body temperature maintenance and growth development. 

It also facilitates the synthesis of adrenal hormones and enhances the body's stress tolerance.

  • Substrate for Melanin Production

It is gradually converted into melanin under the catalysis of tyrosinase, 

which determines pigmentation in skin, hair and iris. 

It also forms a vital physiological defense for skin against UV damage.

  • Regulation of Protein Function

As a structural amino acid of proteins, it broadly participates in biological processes including cell proliferation,

differentiation and metabolic regulation.

 

Application

  • Food & Nutritional Supplement Sector

Sports Nutrition: Widely incorporated into endurance and focus-support sports supplements to 

relieve central fatigue caused by high-intensity exercise and high-temperature environments.

Functional Dietary Supplements: Anti-fatigue and mood-support products targeting people 

with late-night schedules and high work pressure to help improve mental status.

Food Processing: Used as an amino acid fortifier in special diets. 

It also takes part in the Maillard reaction to enhance the flavor and color of baked goods and meat products.

  • Feed & Aquaculture Sector

Livestock & Poultry Feed Additive: Added to poultry diets to deepen the pigmentation of egg yolks and poultry skin, 

and optimize breed characteristics of special livestock such as black-bone chickens.

Aquaculture: Acts as a nutritional component and feeding attractant in aquafeeds; 

Promotes pigmentation on fish body surface and improves feed palatability.


Specification

Product

L-Tyrosine

Item

Specification

Appearance

White crystals or crystalline powder

Assay/ % (dry basis)

98.5-101.5

Loss on drying/%

≤0.30

Residue on ignition/ %

≤0.40

Specific Rotation

-9.8° -11.2°

Single impurity/%

0.5

Total impurities/ %

2.0

Chlorides/ppm

400

Sulfates/ppm

≤400

Iron/ppm

≤30

Heavy Metals/ppm

≤15

Lead/ppm

≤3

Arsenic/ppm

≤1.5

Mercury/ppm

≤0.1

Cadmium/ppm

≤1

Total Plate Count/(CFU/g)

1000

Yeast and Mold/(CFU/g)

100


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