L-Tyrosine

L-tyrosine is a conditionally essential amino acid, with core functions including:

Neurotransmitter synthesis:

• Precursor substances: synthesized dopamine (regulating emotions and motivation), norepinephrine (enhancing alertness), and adrenaline (stress response).
• Used to improve cognitive function under stress (such as sleep deprivation or high-intensity work).
• Thyroid hormone synthesis: The raw materials that make up thyroxine (T ₄) and triiodothyronine (T3).
• Melanogenesis: catalyzed by tyrosinase to form skin/hair pigments (deficiency may lead to albinism).

Application areas:

• Antidepressant/ADHD adjuvant therapy (combined with vitamin B and folic acid).
• Exercise supplements (reducing psychological fatigue, dosage 500-2000 mg/day).

be careful:

• Use with caution in patients with hyperthyroidism (may exacerbate hormone secretion).
• Caution should be exercised when using MAO inhibitors in combination (which may increase blood pressure).