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Thyrocsin by Thorne
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Thyrocsin 120s by Thorne Thyroid Cofactors w/ Iodine, Tyrosine, Ashwaganda


UPC: 693749784012
  • Expiration: 01/2026

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    Thyrocsin™ is a nutritional and botanical support for healthy thyroid function in a non-glandular formulation.*
    Thyrocsin thyroid cofactors enhance T4 hormone levels and support peripheral conversion of T4 to T3.* A Thorne exclusive.


    Benefits - Energy, Thyroid Support
    Thyroid hormones regulate the metabolism of proteins, fats, and carbohydrates, thus affecting how these macro-nutrients produce energy. A deficiency or excess of thyroid hormones can have far-reaching effects. For example, a high cortisol level can interfere with thyroid function, resulting in low thyroxine (T4) or poor conversion of T4 to the active form, triiodothyronine (T3). Each thyroid hormone has multiple important functions in the body; for example, T4 supports cardiac output, heart rate, respiratory rate, and basal metabolic rate – a low basal metabolic rate can cause a person to be fatigued, chilly, and have trouble losing weight. Thyrocsin provides nutritional and botanical support for healthy thyroid function, for the conversion of T4 to T3, and for normal cortisol levels.* This non-glandular thyroid-support formula is available only from Thorne.

    Thorne's Thyrocsin formula contains key ingredients for thyroid support, including iodine, which is necessary for formation of T4, and L-tyrosine, which is a necessary component of both T4 and T3 formation.* Animal studies have indicated that the Ayurvedic botanical, ashwagandha, can increase T4 concentrations.* Thyrocsin also includes several nutrient cofactors necessary for converting T4 to T3, including the minerals selenium, zinc, and copper.* Thyrocsin includes vitamin B12 because a deficiency of this vitamin appears to interfere with the activity of thyroid hormones.* Conversion of T4 to T3 can be inhibited by heavy metal toxicity and lipid peroxidation; hence, the inclusion of antioxidant vitamins C and E to counterbalance this inhibition.*

    Take 2 capsules two times daily or as recommended by your health professional.
    Servings per container: 60

    Two Capsules Contain:
    Vitamin C (as Ascorbic Acid) 200 mg.
    Vitamin E (as d-Alpha Tocopheryl) 100 IU.
    Vitamin B12 (as Methylcobalamin) 100 mcg.
    Iodine (as Potassium Iodide) 225 mcg.
    Zinc (as TRAACS® Zinc Bisglycinate Chelate)* 5 mg.
    Selenium (as L-Selenomethionine) 100 mcg.
    Copper (as Copper Citrate) 500 mcg.
    L-Tyrosine 500 mg.
    Ashwagandha extract (KSM-66®)** (root) (Withania somnifera) 90 mg.

    Other Ingredients:

    Hypromellose (derived from cellulose) capsule, Leucine, Silicon Dioxide.*This product uses Albion's TRAACS® Zinc Bisglycinate Chelate. TRAACS is a registered trademark of Albion International, Inc. **This product uses Ixoreal Biomed's KSM-66® Ashwagandha. KSM-66 Ashwagandha is a registered trademark of Ixoreal Biomed, Inc.

    This product is contraindicated in an individual with a history of hypersensitivity to any of its ingredients.
    Iodine may occasionally cause an allergic reaction in some individuals.
    If pregnant, nursing, or trying to conceive, consult your health professional before using this product.
    Tyrosine is contraindicated in individuals taking an MAO inhibitor antidepressant medication.

    * These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.