Tyrosine is a non-essential amino acid. Foods rich in tyrosine include wheat germ, granola, oats, cheeses, dairy products, chocolate, yogurt, pork, turkey, chicken, and wild game. However, trying to obtain the benefits of tyrosine from the diet is not an option, since the foods that are the richest sources of tyrosine, namely turkey and wild foul, are also the richest sources of the amino acid tryptophan, which is notorious for its ability to induce lethargy and sleep.
Primary Uses: Tyrosine is the precursor for the neurotransmitters epinephrine, norepinephrine, and dopamine, which are essential for mood, cognitive function and central nervous system function. The most prevalent usage for supplemental tyrosine appears to be the enhancement of cognitive function and alertness under conditions of environmental stress such as sleep deprivation, multitasking in the workplace, and functioning at high altitudes and/or cold temperatures. It is noteworthy to mention that a high percentage of the studies done on tyrosine are conducted by the military. Clinical trials with tyrosine have also been conducted with respect to attention deficit disorder (ADD). Secondary Uses: It is also the precursor of the important thyroid hormone thyroxine (T4) as well as melanin, the skin and hair pigment.
Persons who are required to work long hours under stressful conditions, workers and professionals who must multitask, those who experience physical and mental stress and must work anyway, students, and those who have difficulty concentrating such as in ADD can benefit from supplementing with L-Tyrosine.
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