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Cardiovascular Research Ltd., Norival, 120 Capsules (Discontinued Item)

By Cardiovascular Research Ltd.

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The item is currently out of stock and replenishment is unconfirmed.

Out of Stock - Discontinued
  • Product Code: CVR-20111
  • UPC Code: 999901201110
  • Package Quantity: 120 Capsules
  • Dimensions: 2.3 x 2.3 x 4.2 in, 0.2 lbs (0.09 kg)
  • Important Note:

    Please Note: This item has been discontinued and replaced by CVR-13066.

Product Overview

  • N-Acetyl-L-Tyrosine with Biopterine
  • Dietary Supplement

Norival is a scientifically-designed supplement containing a special form of the amino acid L-tyrosine in conjunction with the rare vitamin, Biopterin.

Suggested Use

Take one or two capsules daily, or as directed by a physician.

Other Ingredients

Cellulose, gelatin, magnesium stearate and silicon dioxide.

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Supplement Facts
Serving Size: 1 Capsule
Servings per Container: 120
  Amount Per Serving %Daily Value*
Vitamin B6 (as pyridoxal-5-phosphate) 10 mg 500%
N-Acetyl L-Tyrosine 300 mg **
Biopterin 25 mcg **
* Percent Daily Values are Based on a 2000 Calorie Diet.
** Daily Value Not Established.

iHerb Customer Reviews

5 Stars
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1 Stars

Norival, 120 capsules

Posted by Reviewer2869683 on Oct 18, 2011

This product works well with L-Methylfolate (5-MTHF). For those with homozygous MTHFR 677C-T mutation Norival and L-Methylfolate 10mg has helped my mental clarity, lethargy, moodiness, and depressive episodes. I am not on any antidepressants. Has also worked well for my teenage son with the same double MTHFR mutation.

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8 people found the following review helpful

Terrific for restless leg syndrome, insomnia, ADD!

Posted by Reviewer3281013 on Apr 17, 2011

Restless leg syndrome is a dopamine deficiency like Parkinson ’s disease or Attention Deficit Disorder. Tyrosine is the amino acid necessary for dopamine production. Tyrosine requires B-12, folinic (folic) acid and B-6. Many of us do not properly metabolize standard folic acid, requiring an alternative form called Biopterine (BH4). Plain tyrosine gave me terrible diarrhea, even when taken with B-complex. This is the only tyrosine combination I can take without negative side effects. Taken 2 hrs before bedtime helps with the restless leg insomnia, or when I get the shakes, or early in the morning when I just can’t get going, really works. Love this product!

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7 people found the following review helpful

Perfect for people with genetic problems

Posted by Reviewer3181965 on Oct 08, 2012

I've just discovered I have a rare inborn error of metabolism that leads to low levels of tetrahydrobiopterin (BH4). I tried ordinary L-tyrosine and it worked. Norival actually includes biopterin (although doesn't state which form BH4 or BH2)and cofactor P5P, in addition to N-acetyl L-tyrosine (active form). A deficiency of an enzyme is felt in every cell, especially in the brain. Norival made my brain work properly, my temperature regulation improved amazingly! The dose must be individually adjusted. I take all such supplements 3x daily, in smaller doses, to keep the blood supply stable. I only wish I could contact the company, to learn which biopterin they use.

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6 people found the following review helpful


Posted by Reviewer1407562 on Dec 16, 2010

Tyrosine helps with the production of dopamine which is lacking in people with Parkinson's. Some people like myself have a hard time assimilating tyrosine without it's co-factor biopterin. Norival has both N Acetyl L Tyrosine and Biopterin. It has been of great help in reducing my symptoms.

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5 people found the following review helpful

There are better options if not looking for the rare Biopterin

Posted by Reviewer1733570 on Jun 07, 2013

I get a nice awakening push from plain Tyrosine, however, far from improving mood I get irritable on this product.

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4 people found the following review helpful

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