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Thorne Research, L-Tyrosine, 90 Veggie Caps

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In Stock
  • Expiration Date: Apr 2018
  • Shipping Weight: 0.24 lbs (0.11 kg)
  • Product Code: THR-51403
  • UPC Code: 693749514039
  • Package Quantity: 90 Veggie Caps
  • Dimensions: 2.3 x 2.3 x 4.3 in, 0.2 lbs (0.09 kg)
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Save $4.00 when you purchase these items today for only $26.75
Total: $30.75
Combo Discount: - $4.00
Together: $26.75

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Product Overview


  • Dietary Supplement
  • Hypo-Allergenic

L-Tyrosine essential for neurotransmitter and thyroid hormone synthesis

  • important nutrient for healthy adrenal function
  • supports the thyroid gland
  • promotes a positive mental state and healthy stress management
  • contains no preservatives, magnesium stearate, or other lubricants and diluents

Tyrosine is an amino acid precursor for synthesis of the neurotransmitters norepinephrine and dopamine. By improving the rate of neurotransmitter synthesis, 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 tyrosine, making supplementation with tyrosine desirable.

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, tyrosine stimulates growth hormone and is involved in adrenal and pituitary function. Tyrosine is also a powerful antioxidant, scavenging and neutralizing free radicals and inhibiting fat oxidation

Suggested Use

Take 1 capsule three times daily or as recommended by your health-care practitioner

Other Ingredients

Hypromellose (derived from cellulose) capsule, leucine, silicon dioxide.


Tamper Evident: Use only if bottle is sealed.

Warning: If pregnant, nursing, or trying to conceive, consult your health-care practitioner before using this product.

Store tightly sealed in a cool, dry place.

Supplement Facts
Serving Size: One Capsule
Each Capsule Contains: Amount Per Serving % DV
L-Tyrosine 500 mg *
*Daily Value (DV) not established.
iHerb Customer Reviews

No Difference

Posted by Reviewer2459375 on Feb 13, 2015

I haven't noticed any difference when taking these.

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Great for increasing alertness and thyroid support

Posted by 4765620060371386981 on Jan 26, 2015

Use this in the morning to help increase alertness. Also helps with my thyroid issues, along with taking iodine. Like this brand because no added unnecessary ingredients.

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Great Thorne Product

Posted by healthfirst on Oct 15, 2014

Another supplement recommended by my ND. Works great, no complaints. Will order again.

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Posted by Reviewer3018804 on Oct 09, 2014

I bought for Thyroid issues. It's a good brand and along with other supplements this is helpful to the thyroid.

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Posted by 4625915390168235560 on Sep 21, 2013

Best L-tyrosine!

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