500 mg 100 tablets: Source Naturals
Retail Price: $13.50
Your favorite Life Extension® products can be delivered to you automatically. Just look for the “AutoShip” button. Select AutoShip, and choose your preferred ship-out date. It's that easy!
L-tyrosine is an amino acid that can be converted in the brain and in the adrenal glands to dopamine, norepinephrine, and epinephrine (adrenaline) hormones that are depleted by stress, overwork and certain drugs. By replenishing norepinephrine in the brain, mental energy levels may be improved. The conversion step from L-tyrosine to norepinephrine may be enhanced cofactor vitamins B6 and C are consumed with L-tyrosine.
L-tyrosine also acts as a precursor to thyroid hormones, enkephalins and melanin.
Cells in the adrenal medulla synthesize and secrete norepinephrine and epinephrine. Since both norepinephrine and epinephrine can cause smooth muscle (arterial) contraction, care with blood pressure should be taken when supplementing with L-tyrosine.
|Dosage and Use|
Cancer patients should avoid taking L-phenylalanine and L-tyrosine. Certain cancers, such as melanoma, depend on these amino acids to fuel their growth.
Supplemental use of L-phenylalanine and L-tyrosine may raise or normalize blood pressure. Insomnia may occur from over-stimulation if taken too close to bedtime. Individuals with the rare metabolic disorder phenylketonuria should avoid phenylalanine. Those suffering from migraine headaches should also avoid L-phenylalanine and L-tyrosine because they form tyramine, a substance that may trigger migraines.
Product reviews are provided for informational purposes only and reflect solely the views and opinions expressed by the contributors and not those of Life Extension. We do not verify or endorse any claims made in these reviews. Please read the full product reviews disclaimer.