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Doctor's Best, Best L-Tyrosine, 500 mg, 120 Veggie Caps

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Doctor's Best, Best L-Tyrosine, 500 mg, 120 Veggie Caps

In Stock — Only 9 left
  • Expiration Date: Mar 2019
  • Shipping Weight:
    0.14 kg
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  • Product Code: DRB-00316
  • UPC Code: 753950003163
  • Package Quantity: 120 Veggie Caps
  • Dimensions:
    6.1 x 6.1 x 11.2 cm , 0.11 kg
    Switch to Imperial units
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Product Overview


  • Ortho Science-Based Nutrition
  • Dietary Supplement
  • Brain Transmitter Support
  • Non-GMO
  • Gluten Free

Tyrosine is conditionally essential amino acid that is a precursor to the catecholamine transmitters dopamine, epinephrine, and norepinephrine. These are vital messengers for the brain and the body's other nerve networks. The thyroid gland also needs tyrosine to make the vital hormone thyroxine.

  • Precursor for the nerve messengers dopamine, norepinephrine, and epinephrine (adrenaline)
  • Precursor for thyroxine production by the thyroid gland

Suggested Use

Adult use: Take 1 capsule daily between meals, or more, as recommended by a nutritionally informed physician.

Other Ingredients

Modified cellulose (vegetarian capsule).


Store in a cool dry place.

Supplement Facts
Serving Size: 1 Capsule
Servings Per Container: 120 Servings
  Amount Per Serving % Daily Value
Tyrosine (L-Tyrosine) 500 mg
† Daily Value not established.
iHerb Customer Reviews

This is what do you need

Posted by iHerb Customer on Jul 16, 2017 | Verified Purchase

Very good amino acid.

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Great energy

Posted by iHerb Customer on Jul 07, 2017 | Verified Purchase

Boost my energy and social skills. ; very nice.

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hypoactive thyroid

Posted by iHerb Customer on Jun 16, 2016 | Verified Purchase

I have hypoactive thyroid. Taking every day Doctor's Best L-Tyrosine and additionally selenium . It helps me feel better, no so tired

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Use to stimulate production of T4

Posted by iHerb Customer on Apr 11, 2016 | Verified Purchase

L-Tyrosine can increase T4, I haven't taken another blood test yet but I did notice that my mind seems sharper (clearer?).

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Posted by iHerb Customer on Jun 15, 2015 | Verified Purchase

I have bought this product plus 5htp to feel better because I have problems with depression. However, I feel sleepy with no energy when I am awake. Two years ago I took only 5htp with some vitamins but I wasn't satisfied with the results. Then I've red that it is good to combine it with Tyrosine. It isn't. I think that it's better to go to a psychiatrist then to experiment. The brand is not the subject just Tyrosine.The product works but it's not for depression. If you have problems with insomnia this can surely work. I had problems with insomnia and now I sleep like a log. The problem is that I'm sleepy and with no energy. That's why I'll quit using it.

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