A specific amino acid for the nervous system. It improves cognitive functions (memory, concentration). Provides an anti-stress and anti-anxiety effect. Increases energy and improves metabolism in cases of hypothyroidism. Stress and intellectual overwork can lead to a decrease in tyrosine levels in neurons and reduce attention and concentration abilities. L-Tyrosine is a precursor amino acid of dopa and dopamine (memory factor), a precursor of catecholamines (adrenaline and noradrenaline), excitement hormones, and satiety hormones (appetite-suppressing effect). Finally, it is a precursor of thyroid hormones (thyroxine and thyronine). Useful in the treatment of chronic fatigue syndrome, this amino acid essential for well-being has recognized anti-stress properties. Used by the thyroid to produce an important hormone, thyroxine, which oversees numerous metabolic functions, it is recommended in cases of hypothyroidism. Finally, it facilitates weight loss by increasing basal metabolism and decreasing appetite. Sugar-free, salt-free, and starch-free dietary supplement. L-tyrosine is a precursor amino acid of dopamine and adrenaline.