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Thorne Research, Iodine & Tyrosine, 60 Veggie Caps

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Out of Stock — Estimated availability 02/25/2017
  • Shipping Weight:
    0.18 lbs
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  • Product Code: THR-21902
  • UPC Code: 693749219026
  • Package Quantity: 60 Veggie Caps
  • Dimensions:
    2 x 2 x 3.9 in, 0.15 lbs
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Product Overview


  • Dietary Supplement
  • Hypo-Allergenic
  • Key Nutrients for Thyroid Support
  • Also Promotes Healthy Adrenal Function
  • Made without Flowing Agents that can Inhibit Bioavailability
  • Essential Mineral and Amino Acid Support for the Thyroid Gland

The thyroid hormones, thyroxine (T4) and triiodothyronine (T3), are produced by the thyroid gland. The major form of thyroid hormone in the blood is thyroxine (T4); in fact, there is generally 20 times more T4 in the blood than T3. The thyroid hormones are essential to the proper development and differentiation of all cells of the human body. The thyroid hormones regulate the metabolism of proteins, fats, and carbohydrates, affecting how humans use these compounds to produce energy. Thyroid hormones have important functions in the body; for example, thyroxine supports cardiac output, heart rate, respiratory rate, and basal metabolic rate.

Suggested Use

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

Other Ingredients

Hypromellose (derived from cellulose) capsule, Silicon Dioxide.


Tamper Evident: Use only if bottle is sealed.

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 % Daily Value
Iodine (as Potassium Iodide) 225 mcg 150%
L-Tyrosine 500 mg *
*Daily Value (DV) not established
iHerb Customer Reviews

Thorne is the best

Posted by 5557648151969655293 on Jan 22, 2017

my naturopath did some bloods that came back low in Iodine so i started taking this. Cant say I notice any difference but I trust the brand

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I believe there are better options

Posted by Health-Is-Wealth on Nov 18, 2013

Personally, I prefer a liquid formula added to drinking water and tyrosine in its own cap. These do not provide enough flexibility, plus they contain silicon dioxide. Not right for me. If this review was helpful to you, please click YES below - thank you. For reviews of all the products I have purchased from iHerb, please click my username above.

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Low iodine leads to fatigue, birth defects

Posted by 4883319748657197439 on Aug 25, 2013

After feeling extreme fatigue for a significant period, and eliminating other possible causes, I succeeded in persuading my doctor to request a test of my iodine levels. They showed that I was significantly below safe iodine levels. I started with 2 of the Thorne Iodine and Tyrosine caps, and after about three months, tested again, and my iodine levels had normalised (from about 30 to just over 100, 100 being minimum for normal; sorry don't recall the units). I now take one each cap day, and a second cap every other day. This keeps my iodine levels in the normal range. And my fatigue has gone!

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Trust Thorne

Posted by Reviewer3312905 on Jun 15, 2011

Good product, but take ONLY if recommended by health professional!

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Posted by Reviewer3041632 on Jun 12, 2011

After being told several times by my doctor that I had borderline low thyroid and I should think about medication, I began taking Throne's Iodine & Tyrosine. Two bottles (120 days) later my thyroid tests are great, I have more engery, better hair and fingernails. My doctor is pleased and asked what I had done to make the changes without traditional medicine. When I told him, to his credit, he said he was going to look into that in place of chemical medicines!

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