Tyrosin

Tyr · L-Tyrosin

Mechanism

Tyrosin entsteht durch Hydroxylierung von Phenylalanin und ist Ausgangsstoff fuer Dopamin/Noradrenalin/Adrenalin (geschwindigkeitsbestimmend: Tyrosinhydroxylase; Daubner et al. 2011, PMC3065393, doi:10.1016/j.abb.2010.12.017) sowie fuer die Schilddruesenhormone T3/T4 und Melanin (Wu 2009, PMID 19301095). Als bedingt essenzielle AS wird der Bedarf bei ausreichender Phenylalanin-Zufuhr gedeckt; eine gezielte Tyrosin-Gabe ist beim Pferd weder als bedarfsdeckend noch als leistungs- oder verhaltenswirksam belegt. Ableitungen zu 'Stressresistenz' oder Schilddruesenfunktion stammen aus anderen Spezies/Modellen und sind fuer Pferde spekulativ; NRC 2007 nennt keinen eigenstaendigen Tyrosinbedarf.

Cautions

· Katecholamin-/Schilddruesen-/Beruhigungsbezug beim Pferd nur theoretisch, nicht belegt -> keine Wirkversprechen
· Als Melaninvorstufe theoretischer Bezug zu Melanomen (Schimmel) - spekulativ
· Keine Diagnose-/Heilaussagen

Sources

doi:10.1016/j.abb.2010.12.017Daubner SC et al. 2011 - Tyrosine hydroxylase and regulation of dopamine synthesis, Arch Biochem Biophys 508(1)

PMID 19301095Wu G 2009 - Amino acids: metabolism, functions, and nutrition, Amino Acids 37(1):1-17

NRC 2007National Research Council 2007 - Nutrient Requirements of Horses, 6th rev. ed., National Academies Press

Equiterna Score

58/100

solid

Science4.5/10

Practical experience6/10

Safety7.2/10

Overall score scale

high overall75–100solid55–74limited0–54

How the Equiterna Score is built

The Equiterna Score combines three dimensions into a value of 0-100: science (40%), practical experience (30%) and safety (30%). It is transparently derived from evidence level, attributed sources (PubMed/journals), legal classification and cautions. The FEI doping status is shown separately as a competition-law note and does not enter the score. Commissions and vendor relationships have no influence on the score. In addition, the editorial safety rating caps the result: it limits the safety dimension and the overall tier (orange: at most solid). For entries rated red, no score is calculated at all. The rating never raises anything — a green rating does not lift a calculated value.

An editorial assessment of the evidence and safety situation — not a healing claim and not an individual recommendation. It does not replace veterinary advice.

DosageKeine etablierte Pferde-Dosis; Bedarf ueber Phenylalanin/Gesamtprotein gedeckt; gezielte Supplementierung nicht begruendet.

AMG statusComplementary feed

FEI statusNot listed

SafetyVery safe

Evidenceemerging

Usage note

This content is for information and education. It does not replace veterinary diagnosis or treatment. If your horse shows signs of illness, consult a veterinarian.

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Xenophon · On Horsemanship (c. 365 BC)

Equiterna is an intermediary platform for equine knowledge, marketplace and tools — not a veterinary-medicines dealer, veterinary practice or pharmacy. Compound information is study-attributed and free of healing claims. Legal framework: Regulation (EU) 2019/6 / TAMG (DE/AT), Feed Regulation (EC) 767/2009, FEI Prohibited Substances List, HWG.