The amino acid tyrosine is a precursor of the thyroid hormone thyroxine and catecholamine neurotransmitters, enhancing mood and cognitive function especially under situations involving stress or when dopamine, epinephrine or norepinephrine levels require additional support.

• Supplement Facts
  
  Suggested use: As a dietary supplement, take 1–4 capsules daily, in divided doses, between meals.
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• each vegetable capsule contains
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• l-tyrosine (free-form)...................................................................... 600 mg
  
  Other ingredients: vegetarian capsule (cellulose, water)

Uses:

Cognitive Health: In the body, phenylalanine is converted to tyrosine. The amino acid tyrosine is a precursor of catecholamine neurotransmitters, including l-dopa, dopamine, epinephrine, and norepinephrine. These neurotransmitters are responsible for supporting emotional well-being and mental function. l-Tyrosine plays a role in promoting healthy neurotransmitter function in response to environmental and emotional stress. Research has indicated its potential to promote cognitive function and memory under stressful conditions. In one study, l-tyrosine enhanced mood and sleep in subjects with low dopamine levels.
Thyroid: Tyrosine is a key component in the synthesis of the thyroid hormone thyroxine.