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L-Tyrosine Brand names, L-Tyrosine Analogs

L-Tyrosine Brand Names Mixture

  • Tyrosine, L-
  • (-)-a-Amino-p-hydroxyhydrocinnamic acid
  • (S)-a-Amino-4-hydroxybenzenepropanoic acid
  • (S)-Tyrosine
  • Benzenepropanoic acid, a-amino-4-hydroxy-, (S)-
  • L-Phenylalanine, 4-hydroxy-
  • L-p-Tyrosine
  • L-tyrosine
  • Propanoic acid, 2-amino-3-(4-hydroxyphenyl)-, (S)-
  • Tyrosine
  • p-Tyrosine

L-Tyrosine Chemical_Formula


L-Tyrosine RX_link

No information avaliable

L-Tyrosine fda sheet

L-Tyrosine msds (material safety sheet)


L-Tyrosine Synthesis Reference

No information avaliable

L-Tyrosine Molecular Weight

181.191 g/mol

L-Tyrosine Melting Point

342-344 oC

L-Tyrosine H2O Solubility

Slightly soluble

L-Tyrosine State


L-Tyrosine LogP


L-Tyrosine Dosage Forms

Capsules (300 and 500 mg), Powder, and Tablets (300, 500, and 1000 mg)

L-Tyrosine Indication

Tyrosine is claimed to act as an effective antidepressant, however results are mixed. Tyrosine has also been claimed to reduce stress and combat narcolepsy and chronic fatigue, however these claims have been refuted by some studies.

L-Tyrosine Pharmacology

Tyrosine is a nonessential amino acid synthesized in the body from phenylalanine. Tyrosine is critical for the production of the body's proteins, enzymes and muscle tissue. Tyrosine is a precursor to the neurotransmitters norepinephrine and dopamine. It can act as a mood elevator and an anti-depressant. It may improve memory and increase mental alertness. Tyrosine aids in the production of melanin and plays a critical role in the production of thyroxin (thyroid hormones). Tyrosine deficiencies are manifested by hypothyroidism, low blood pressure and low body temperature. Supplemental tyrosine has been used to reduce stress and combat narcolepsy and chronic fatigue.

L-Tyrosine Absorption

L-tyrosine is absorbed from the small intestine by a sodium-dependent active transport process.

L-Tyrosine side effects and Toxicity

L-Tyrosine has very low toxicity. There have been very few reports of toxicity. LD50 (oral, rat) > 5110 mg/kg.

L-Tyrosine Patient Information

Pregnant women and nursing mothers should avoid supplementation with L-tyrosine.

L-Tyrosine Organisms Affected

Humans and other mammals