L-Tyrosine is an amino acid found in the diet that is metabolized to produce catecholamines such as dopamine (DA) and norepinephrine (NE).[1] L-tyrosine is also used in the production of thyroid hormones.[2] L-Tyrosine is often taken as a supplement to help increase catecholamine levels depleted during stressful or challenging conditions.[1] It is taken as a free-form amino acid supplement, commonly alone or as part of weight loss or preworkout supplements.
What is L-tyrosine?
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•Last Updated: May 16, 2025
L-Tyrosine is an amino acid that is metabolized to produce catecholamines like dopamine and norepinephrine, and it is also involved in the production of thyroid hormones. It is commonly taken as a supplement to boost catecholamine levels during stress and is often included in weight loss or preworkout products.