Douglas Labs, L-Tyrosine 800 mg 100 Capsules

From: Douglas Labs
SKU: DL-TYR

Availability: Out of stock

$37.90

Quick Overview


    • Dietary Supplement

    • General Health

    • Neurological

Product Description

L-Tyrosine capsules, provided by Douglas Laboratories, contain 800 mg pure L-tyrosine.

Amino acids have many functions in the body. They are the building blocks for all body proteins – structural proteins that build muscle, connective tissues, bones and other structures, and functional proteins in the form of thousands of metabolically active enzymes. Amino acids provide the body with the nitrogen that is essential for growth and maintenance of all tissues and structures. Proteins and amino acids also serve as a source of energy, providing about 4 calories per gram.

Aside from these general functions, individual amino acids also have specific functions in many aspects of human physiology and biochemistry.

Tyrosine is a precursor of important neurotransmitters in the brain, such as dopamine, epinephrine (adrenaline) and norepinephrine (noradrenaline). The synthesis of these neurotransmitters is limited by the rate of tyrosine entry from plasma into the brain. For example, low plasma levels of tyrosine, as can result from the use of oral contraceptive drugs, cause lower norepinephrine synthesis which is associated with mood changes and other neurological signs.

Tyrosine is also a precursor of the thyroid hormones triiodothyronine and thyroxine. In the thyroid gland, these hormones are synthesized from a precursor protein called thyroglobulin, which is a large protein rich in tyrosine residues that are reacted with iodine. When needed, thyroid hormones are released via hydrolysis from thyroglobulin. Thyroglobulin functions as storage for the thyroid hormones; a several weeks’ supply of these hormones exists in the normal thyroid gland. Once released, thyroid hormones act via specific cell receptors to increase oxygen consumption and basal metabolic rate. L-tyrosine is a conditionally essential amino acid that can be manufactured by the body from the essential amino acid phenylalanine. Therefore, adequate tyrosine production depends on a sufficient supply of phenylalanine in the diet.

Supplement Facts

Suggested Use One to two capsules daily on an empty stomach with plenty of liquid, or as directed by physician.
Supplement Facts
Supplement Facts
Serving Size: 1 Capsule
Servings Per Container: 100
  Amount Per Serving % DV
L-Tyrosine (as L-tyrosine USP)  800 mg 

*Daily Value (DV) not established.

Other Ingredients Gelatin (capsule), cellulose, water, magnesium stearate and silica.

Additional Information

SKU DL-TYR
Name Douglas Labs, L-Tyrosine 800 mg 100 Capsules
UPC 745287060506
MPN TYR
Brand Douglas Labs
Form Capsule
Shipping Weight 0.2500
Serving Size 1 Capsule
Package Description 100 Capsules

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