Disclaimer: This scientific independent research is provided by Aisle7 and is for informational use only. GNC provides this information as a service but does not endorse it. Likewise, Aisle7 does not recommend or endorse any specific products.
I accept these terms-
Product Label
There is a label available for this product. To view the label, click this icon or navigate to the "Label" tab below.
-
ShopRunner
GNC L-Tyrosine 1000
60 Tablets128212
Price: $18.99
Member Price: $15.19
Become a Member
Free Membership with $10 Purchase! Details
Free Shipping on Orders of $99 or More! Details
AVAILABILITY: In stock, Ships in 1-2 full bus. days. Details
- Description
-
- Tyrosine is a non-essential amino acid that can be synthesized by the body.
- L-Tyrosine provides dietary support for normal, healthy nervous system activity.*
- Amino acids are the building blocks of protein and help fuel skeletal muscles.*
- Each tablet contains 1000 mg of free-form Tyrosine.
- Kosher and Vegetarian
* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
- Supplement Facts
-
As a dietary supplement, take one to four tablets daily on an empty stomach.
Other Ingredients: Cellulose, Food Glaze No Sugar, No Starch, No Artificial Color, No Artificial Flavors, No Preservatives, Sodium Free, No Wheat, No Gluten, No Corn, No Soy, No Dairy, Yeast Free Storage Instructions: Store in a cool dry place. Warning: Keep out of reach of children General Nutrition CorporationPittsburgh, PA 15222
Serving Size 1 Tablets Servings Per Container 60 Amount Per Serving % DV L-Tyrosine 1000.00 mg ** ** Daily Value (DV) not established - Health Notes
-
L-Tyrosine
L-Tyrosine- Reliable and relatively consistent scientific data showing a substantial health benefit.
- Contradictory, insufficient, or preliminary studies suggesting a health benefit or minimal health benefit.
- For an herb, supported by traditional use but minimal or no scientific evidence. For a supplement, little scientific support.
Our proprietary "Star-Rating" system was developed to help you easily understand the amount of scientific support behind each supplement in relation to a specific health condition. While there is no way to predict whether a vitamin, mineral, or herb will successfully treat or prevent associated health conditions, our unique ratings tell you how well these supplements are understood by the medical community, and whether studies have found them to be effective for other people.
For over a decade, our team has combed through thousands of research articles published in reputable journals. To help you make educated decisions, and to better understand controversial or confusing supplements, our medical experts have digested the science into these three easy-to-follow ratings. We hope this provides you with a helpful resource to make informed decisions towards your health and well-being.
This supplement has been used in connection with the following health conditions:
Used for Amount Why Stress150 mg for every 2.2 lbs (1 kg) of body weight, split into two doses taken before stressful activitiy (take the second dose 40 to 90 minutes after the first) 
[3 stars] Occasionally taking this amino acid before a stressful activity may help maintain your mental capacity.DepressionConsult your doctor
[2 stars] Some people with depression have been found to improve with tyrosine.
PhenylketonuriaConsult a qualified healthcare practitioner [2 stars] Supplementing with L-Tyrosine may help prevent a deficiency caused by the PKU diet and improve behavoir.Alcohol Withdrawal
(Glutamine, Multivitamin, Phenylalanine, Tryptophan)Refer to label instructions 
[1 star] In double-blind research, alcoholics treated with L-tyrosine combined with DLPA (D,L-phenylalanine), L-glutamine, prescription L-tryptophan, plus a multivitamin had reduced withdrawal symptoms and decreased stress.
Parkinson's DiseaseRefer to label instructions [1 star] L-tyrosine is the direct precursor to L-dopa and therefore could be an alternative to L-dopa therapy, however, it should not be taken with L-dopa as it may interfere with L-dopa transport to the brain.L-tyrosine is a nonessential amino acid (protein building block) that the body synthesizes from phenylalanine, another amino acid. Tyrosine is important to the structure of almost all proteins in the body. It is also the precursor of several neurotransmitters, including L-dopa, dopamine, norepinephrine, and epinephrine.
Copyright 2013 Aisle7. All rights reserved. Aisle7.com
The information presented in Aisle7 is for informational purposes only. It is based on scientific studies (human, animal, or in vitro), clinical experience, or traditional usage as cited in each article. The results reported may not necessarily occur in all individuals. For many of the conditions discussed, treatment with prescription or over the counter medication is also available. Consult your doctor, practitioner, and/or pharmacist for any health problem and before using any supplements or before making any changes in prescribed medications. Information expires June 2014.
- Label
-
To view the Label you will need Adobe Acrobat Reader installed. You can download a free copy of the Adobe Acrobat Reader at: http://www.adobe.com/acrobat/readstep.html
- Ratings and Reviews
-
REVIEW SNAPSHOT®
by PowerReviewsPros
- Simple to take (4)
- Acts quickly (3)
- No side effects (3)
Cons
Best Uses
Reviewed by 5 customers
Sort by
Displaying reviews 1-5
Pros
- Acts Quickly
- Simple To Take
Cons
- Causes Side Effects
Best Uses
Comments about GNC L-Tyrosine 1000:
Feel good when taken but after it wears off you feel alittle shaky
Pros
- No Side Effects
Cons
- No Results
Best Uses
Comments about GNC L-Tyrosine 1000:
I have a very distinct reaction to good L-tyrosine (and a good form doesn't have to be expensive either). This produced zero effects. It also does not dissolve quickly. Get a capsule form instead.
Pros
- Acts Quickly
- Produces Results
- Simple To Take
Cons
Best Uses
- Daily Use
Comments about GNC L-Tyrosine 1000:
I have an adrenal deficiency, causing me to suffer from chronic fatigue. I've tried everything - B vitamins, medications, supplements, diet changes (even incorporating hard-to-find foods), cleanses - anything that I heard might help. The best combination I've found is 1500mg L-Tyrosine (which is not made, as far as I can find - I have to buy the 1000mg and the 500mg) 2x daily in conjunction with my medications. The GNC 1000mg is the highest dosage in one pill that I've found. All others are 750mg, maximum. Since I have to take these pills so often, the expense adds up, so it's nice to have the high quality/high dosage available.
Pros
- Activating
- Acts Quickly
- No Side Effects
- Produces Results
- Simple To Take
Cons
- Results Lessen Over Time
Best Uses
- As needed
- Short-Term Solution
Comments about GNC L-Tyrosine 1000:
Works well, but there is tolerance to it's effects, needing to increase the dose (like caffeine) to get the anti-fatigue, increased energy and motivation effects.
Pros
- No Side Effects
- Simple To Take
Cons
Best Uses
- Daily Use
Comments about GNC L-Tyrosine 1000:
use to assist tacjling the day after all-nighter. data support its effects but i couldnt really feel anything.
Displaying reviews 1-5
- Ask A Question
-
PEOPLE WHO BUY THIS ALSO BUY:
-
- Price: $14.99
-
GNC Triple Strength Fish Oil plus Krill
- Price: $29.99
-
- Price: $19.99
