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Source Naturals, L-Tyrosine, Free-Form Powder, 3.53 oz (100 g)

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In Stock
  • Expiration Date: May 2018
  • Shipping Weight: 0.41 lbs (0.19 kg)
  • Product Code: SNS-00187
  • UPC Code: 021078001874
  • Package Quantity: 3.53 oz (100 g)
  • Dimensions: 2.7 x 2.7 x 5.4 in, 0.35 lbs (0.16 kg)
Product Overview


  • Amino Acid Supplement

L-Tyrosine is a free-form amino acid which rapidly crosses the blood-brain barrier. It is a precursor for the neurotransmitters dopamine, norepinephrine and epinephrine, as well as for thyroid hormones and enkephalins, special peptides which subdue messages of physical discomfort. Tyrosine is also a constituent of amino sugars (glycosaminoglycans), special compounds which have important roles throughout the body.

Suggested Use

1/4 teaspoon daily between meals.

Other Ingredients

Hypoallergenic: contains no yeast, dairy, egg, gluten, corn, soy or wheat. Contains no sugar, starch, salt, preservatives or artificial color, flavor or fragrance.


Contains tyrosine. Not to be used with MAO inhibitor drugs. If you are pregnant, may become pregnant, or breastfeeding, consult your health care professional before using this product.

Do not use if either tamper-evident seal is broken or missing. Keep out of the reach of children.

Supplement Facts
Serving Size: 1/4 Teaspoon
Servings Per Container: 151
  Amount Per Serving % Daily Value
L-Tyrosine 660 mg
†Daily Value not established.
iHerb Customer Reviews

Not for everyone, I guess.

Posted by FourSeasons on Jun 04, 2015

This didn't appear to agree with me. Even one small dose made me feel bad; maybe it was just a socalled "discharge of toxicity" or something, but some of us need medicines that don't produce such profound discomfort. But I would invite others to try it.

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Posted by Reviewer2827034 on Aug 20, 2014

Tasteless, odourless. Somehow it seems to make me less tired.

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love it!

Posted by Reviewer1044268 on Nov 03, 2013

Makes me feel great. Concentration at work, cravings are gone and feel happier in general. It's an amazing product and not expensive.

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Source Naturals, L-Tyrosine, Free form powder 3.53 oz (100 g)Workswor

Posted by Reviewer1928779 on Dec 20, 2011


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Best powder I have found

Posted by Reviewer2071384 on Dec 18, 2011

This product offers very good value and is easy to take. Some powders do not dissolve in water leaving a gritty residue. NOT this one. Dissolves into a milky powder and is tasteless.

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