L-tyrosine is an amino acid precursor for synthesis of the neurotransmitters norepinephrine and dopamine.By improving the rate of neurotransmitter synthesis, L-tyrosine stimulates the central nervous system. It appears to function as an adaptogen by relieving physical symptoms of stress, such as mood swings. Chronically stressed individuals may not efficiently convert phenylalanine to L-tyrosine, making supplementation with L-tyrosine desirable.
L-tyrosine also serves as a precursor for the thyroid hormone thyroxine and melanin, the pigment responsible for skin and hair color and protection against harmful ultraviolet rays. In addition, L-tyrosine stimulates growth hormone and is involved in adrenal and pituitary function. L-tyrosine is also a powerful antioxidant, scavenging and neutralizing free radicals and inhibiting fat oxidation.
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From: Martek Name: Mr.Anthony(Vice-President) E-mail: **********
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From: GNC Name: Mr.Ryan(Manufacturer's Representative) E-mail: **********
GREEN STONE is a member of Herbal Material Association, which means it take great responsibility to ensure and enhancing good quality health supplement products. It is a GMP (good manufacturing practice) compliant company.
From: USANA Name: Mr.Alexander(Vice-President) E-mail: **********
We find that the product ingredient information is very comprehensive. Desides stating the source of the ingredients,GREEN STONE goes to the great length to provide the information and clinical studies of each ingredient used. This is a hallmark of high quality product and services of an excellent herbal raw material online store.