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L-Tyrosine
(free form)
Pharmaceutical grade ultra-pure for maximum bioavailability.
Pure amino acid with no fillers or
additives. HPLC verified.
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Powder - 100 Grams
Item #23290 (100 Servings)
Retail: $15.99
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price:
$7.99 |
save 50% |
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Powder - 500 Grams
Item #23291 (500 Servings)
Retail: $49.99
your price:
$19.99 |
save 58% |
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Powder - 1,000 Grams
Item #23292 (1000 Servings)
Retail: $99.99
your price:
$31.99 |
save 68% |
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Powder - 2,268 Grams
Item #23293 (2268 servings)
Retail: $225.99
your price:
$63.84 |
save 72% |
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150 Capsules - 500 mg
Item #23296
Retail: $27.99
your price:
$9.99 |
save 58% |
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500 Capsules - 500 mg
Item #23297
Retail: $99.99
your
price:
$28.97 |
save 66% |
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1,000 Capsules - 500 mg
Item #23298
Retail: $198.99
your
price:
$49.38 |
save 77% |
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L-Tyrosine is an essential amino acid which supports brain function. It
can be converted by neurons in the brain into the neurotransmitters dopamine and
norepinephrine (noradrenaline), hormones which are depleted by stress, excessive
work and certain drugs. By replenishing norepinephrine in the brain, mental
energy levels are enhanced and a feeling of contentment often occurs. L-tyrosine
boosts certain neurotransmitters in the brain and has been used to support
stress reduction and depression. L-Tyrosine is converted in the body into other
key biologic compounds, including L-dopa, CoQ10, thyroid hormones and melanin.
Tyrosine can also enhance athletic performance. L-Tyrosine is an
important component of protein and helps form the bioactive factors vital to
cellular growth and maintenance. Tyrosine supplementation has the potential to
increase athletic performance in a few ways. One of the mechanisms possibly
contributing to fatigue during exercise is an increase in central serotonin
levels and an increase in the ratio of serotonin to dopamine. Tyrosine may help
decrease this ratio and compete with tryptophan (the amino acid precursor to
serotonin) at the blood-brain barrier. Increased dopaminergic activity may
decrease the perception of fatigue. Also, during highly stressful conditions,
catecholamine levels can become depleted, and tyrosine may be particularly
useful under these conditions.
The amino acid L-tyrosine is a precursor for several substances made in
the body including:
• neurotransmitters such as dopamine and
norepinephrine
• melanins, the pigments largely responsible for skin and hair color
• thyroid hormones, such as thyroxine
NutraBio.com L-Tyrosine is pure free form crystalline amino acid from
microbiological fermentation. It is NOT derived
from milk.
The B vitamins pyridoxine (B-6) and folic acid can assist in the
conversion process.
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We guarantee our
supplements to be the freshest and purest:
Our powders and
capsules contain only pure active ingredient
with absolutely no additives. Other
manufacturers, in an effort to keep costs down,
dilute their products with cheap fillers and add chemical excipients
to their products to speed up their manufacturing output. These
practices cheat you out of the active ingredient. At NutraBio, we've
perfected our manufacturing technology so that excipients aren't
needed, that means no
microcrystalline cellulose, magnesium stearate, silica or other
fillers, just 100% pure active ingredient.
NutraBio supplements are
manufactured under the strictest standards producing the highest
quality and purest supplements available anywhere. Our raw
ingredients undergo state of the art HPLC analysis to insure zero
tolerance for impurities and we manufacture our products every 2 weeks
which guarantees you a minimum of 34 months before expiration.
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Expiration |
34
months minimum |
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Grade |
pharmaceutical |
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Purity |
99.83%+
purity (HPLC) |
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Taste |
bland |
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Solubility |
relatively soluble in water |
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Characteristics |
kosher |
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Appearance |
white
crystalline powder |
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Odor |
none |
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pH |
5.0~6.5 |
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Classification |
free
from amino acid |
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CAS
Registry |
60-18-4 |
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Synonyms |
2-amino-3-(4-hydroxyphenyl)-propanoic acid;
3-(4-hydroxyphenyl)-L-alanine |
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Molecular Formula |
C9H11NO3 |
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Molecular
structure |
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 Recommended Usage:
As a dietary supplement take
1 level scoop (500 mg) or 1 capsule, with water or your favorite
beverage 1-2 times daily on
an empty stomach or as directed by your physician.
For powder mix for 15 to 20 seconds
using a shaker cup or mix thoroughly with a spoon. May not mix very easily. May
be hygroscopic and may clump during shipment which will not effect quality.
Hypoallergenic: contains no yeast, dairy, egg, gluten, corn, soy,
wheat, sugar, starch, salt, preservatives, or artificial color, flavor or
fragrance.
Warning: NOT
INTENDED FOR USE BY PERSONS UNDER THE AGE OF 18. KEEP OUT OF THE RE ACH OF
CHILDREN. If you are
pregnant or breast feeding, consult your health care professional before using
this product. People with known medical conditions and/or taking drugs should
consult with a licensed physician and/or pharmacist prior to taking any dietary
supplements. Do not take in conjunction with MAO inhibitor drugs. Not for use by
persons with a history of malignant melanoma or if bipolar, pregnant, suspect
pregnancy, or lactating. Tyrosine should not be taken by those with conditions
associated with increased dopamine levels such as mania and schizophrenia. This
supplement may increase sensitivity to the effects of CNS stimulants. Caution is
advised when taking tyrosine along with stimulants and dosages should be lowered
accordingly. Keep out of the reach of children.
L Tyrosine side effects:
L-Tyrosine may help some people in their fight against depression, but dosages
above 500 mg, in some people, may cause anxiety, restlessness and rapid heart
rate. L Tyrosine can cause over stimulation, restlessness, anxiety, and
insomnia. Heart palpitations or arrhythmias are potential side effects that
occur from high doses of tyrosine. These can occur in sensitive individuals in
as low a dose as 200 to 500 mg. Always start with a low dose, such as 200 mg or
less, even if it means opening a tyrosine capsule and taking a portion of it.
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Amino acids
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We guarantee our supplements to be the freshest
and purest available:
This supplement contains absolutely NO additives, sweeteners or other fillers or agents that many manufacturers dilute their
products with. NutraBio.com supplements are manufactured under the strictest standards producing the highest quality and purest supplements available anywhere. Our raw ingredients undergo state of the art HPLC analysis to insure zero tolerance for
impurities and by-products. When it comes to price and quality you can't beat
NutraBio.com. We guarantee it!
Purchase
your supplements manufacturer direct at below wholesale price:
Buy directly from the manufacturer and save. We cut out the middlemen and pass the savings on to you.
With NutraBio.com you can buy your supplements at the same low wholesale price
that the chain stores get. We've been around since 1996 and our only
business has been the manufacture and supply of the highest quality nutritional
supplements. We are a professional nutriceutical, FDA inspected facility which
adheres to all FDA, FTC and NNFA labeling and manufacturing guidelines.
Important
facts you should know about our supplements:
- HPLC laboratory tested for purity.
- Freshly manufactured - not expired or closeout.
- Spoon mixes with no gritty taste or residue.
- Backed by the NutraBio.com 30-day money back guarantee.
Certificate of Analysis Proves Quality &
Freshness:
Always know the expiration date of a supplement before you purchase. If the manufacturer
won't
give you the expiration date and a Certificate of Analysis than beware. Many
online venders sell expired or nearly expired products which they get on
closeout from distributors who can no longer sell them to stores. NutraBio.com guarantees that this product is from the freshest and
purest raw
ingredients
available and was packaged within the last two weeks. Click on the red "Purity & Freshness Seal" at
the top of the page to view the actual Certificate of analysis.
FREE dosing scoop with your order: Get the exact dosage every time with a free single-dose scoop. This scoop was designed by our lab
to give you exactly one serving each time. No more measuring or guessing.
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References & research:
[1] Tyrosine (and
N-Acetyl-L-Tyrosine) [PDF, 232KB] Reform Magazine online John M. Berardi
[2] Hair pigmentation: a research update. J Investig Dermatol Symp Proc. 2005
Dec;10(3):275-9 Tobin DJ, Hordinsky M, Bernard BA
[3] The actions of melanin and melanocyte stimulating hormone (MSH)
Neuroendocrinology Letters 1999; 20:265–282 Natalie Rasmussen, Francine Nelson,
Piyarat Govitrapong, Manuchair Ebadi
[4] Melanin [monograph] Wikipedia online encyclopedia
[5] Tyrosine [monograph] Wikipedia online encyclopedia
[6] Dopaminergic deficit and mood disorders. Int Clin Psychopharmacol. 2002
Dec;17 Suppl 4:S1-7; discussion S7 Pania L, Gessab GL
[7] Chronic mild stress (CMS) revisited: consistency and behavioural-neurobiological
concordance in the effects of CMS. Neuropsychobiology. 2005;52(2):90-110. Epub
2005 Jul 19 Willner P
[8] [L-tyrosine cures, immediate and long term, dopamine-dependent depressions.
Clinical and polygraphic studies][Article in French] C R Acad Sci III.
1988;306(3):93-8 Mouret J, Lemoine P, Minuit MP, Robelin N
[9] Tyrosine for the treatment of depression. Nutr Health. 1984;3(3):163-73
Gelenberg AJ, Gibson CJ
[10] Tyrosine improves cognitive performance and reduces blood pressure in
cadets after one week of a combat training course. Brain Res Bull. 1999 Jan
15;48(2):203-9 Deijen JB, Wientjes CJ, Vullinghs HF, Cloin PA, Langefeld JJ.
[11] Cats require more dietary phenylalanine or tyrosine for melanin deposition
in hair than for maximal growth. J Nutr. 2002 Jul;132(7):2037-42 Anderson PJ,
Rogers QR, Morris JG
[12] Vitiligo therapy with oral and topical phenylalanine with UVA exposure. Int
J Dermatol. 1989 Oct;28(8):545-7 Antoniou C, Schulpis H, Michas T, Katsambas A,
Frajis N, Tsagaraki S, Stratigos J
[13] Evidence for antioxidant nutrients-induced pigmentation in skin: results of
a clinical trial. Biochem Mol Biol Int. 1997 Aug;42(5):1023-33 Postaire E,
Jungmann H, Bejot M, Heinrich U, Tronnier H
[14] Stimulation of mouse melanocyte proliferation by Piper nigrum fruit extract
and its main alkaloid, piperine. Planta Med 1999 Oct;65(7):600-3 Lin Z, Hoult
JR, Bennett DC, Raman A
[15] Chronic dietary tyrosine supplements do not affect mild essential
hypertension. Hypertension. 1985 Jul-Aug;7(4):593-6 Sole MJ, Benedict CR, Myers
MG, Leenen FH, Anderson GH
[16] [L-tyrosine: a long term treatment of Parkinson's disease][Article in
French] C R Acad Sci III. 1989;309(2):43-7 Lemoine P, Robelin N, Sebert P,
Mouret J |
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