The amino acid L-tyrosine is involved in numerous bodily functions and is often supplemented as a "diet amino acid" and before training as a starting substance for the synthesis of all catecholamines (L-DOPA, dopamine, adrenaline, noradrenaline, etc.) as well as thyroid hormones.
Tyrosine is enriched with a vitamin B complex, which, among other things, contributes to reducing symptoms of fatigue.