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Thyrocsin

Thorne
4.8
★ ★ ★ ★ ★
(5584 ratings)
Iodine 225 mcg
Tyrosine 500 mg
Selenium 100 mcg
Ashwagandha 90 mg
Product Image
Score96

A premium, high-absorption thyroid and metabolic support formula that uses elite chelated minerals and ashwagandha.

How scoring works
Quantity:120 Capsule(s) • (60 servings)
Goals:
Energy
Hair Health
Metabolism Boost
Brain Health
General Health
Weight Loss

Score 96

A premium, high-absorption thyroid and metabolic support formula that uses elite chelated minerals and ashwagandha.

How scoring works
$40.00($0.66 per serving)
iHerb
$ 40.00
Walmart
$ 40.00
Amazon
$ 40.00
Pure Formulas
$ 40.00
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Analysis

I really like the use of 500 mg of L-tyrosine and zinc bisglycinate, which support your hormone pathways and metabolic efficiency. It also includes bioactive B12 and ashwagandha, which are used to help with stress-related fatigue and mental clarity.

The 100 mcg of selenium is provided in the L-selenomethionine form, which your body can use more effectively than other types. This fits someone looking for a professional-grade supplement to support their thyroid function and daily stamina.

Pros

  • Uses highly bioavailable chelated minerals
  • Provides 500 mg of L-tyrosine per serving
  • Includes active methylcobalamin (B12)
  • Fully transparent and pure ingredient list

Cons

  • Premium price point compared to basic thyroid blends
  • Requires twice-daily dosing (2 capsules)
  • Ashwagandha dose is supportive but not as high as standalone products

Warnings

  • Consult a professional if you have a history of heart rhythm issues
  • Do not use if you are taking prescription thyroid hormones without medical advice
  • Best stored in a cool, dry place to protect the active vitamins

Nutrient quality

98 Highest impact

Incorporates premium Albion bisglycinate chelates and methylated B-vitamins to support high bioavailability. The combination of precursors and botanical adaptogens is expertly designed for metabolic health.

Ingredient transparency

99 Highest impact

Labeling provides exceptional clarity by disclosing specific mineral forms and precise ingredient quantities. Identifying trademarked components like Albion chelates helps the user evaluate the quality of the formula.

Customer satisfaction

99 Highest impact

Exceptional average rating across a large review base suggests high efficacy and user confidence in the brand. Positive feedback frequently highlights improvements in energy and thyroid-related symptoms.

Value for money

85 Highest impact

Price per serving is on the high end, reflecting the premium quality of the professional-grade ingredients. For users seeking elite bioavailability and complex metabolic support, the value is justified.

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Goals

Energy
Impact
Highest effect
A+ Goal FitA+ Strength of SupportA+ CoverageA+ Formula Quality

Iodine and L-tyrosine work synergistically to support the metabolic pathways and thyroid function responsible for daily energy levels. Vitamin B12 and ashwagandha further contribute to this support by addressing cellular metabolism and stress resilience.

Ingredient selection appears well aligned with the multi-pathway approach required for comprehensive energy support. Bioactive forms like methylcobalamin ensure that the nutrients are meaningfully utilized for mitochondrial and hormonal processes.

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Hair Health
Impact
Highest effect
A- Goal FitA+ Strength of SupportA CoverageA+ Formula Quality

Iodine and tyrosine are combined in this thyroid-focused formula to support metabolic health, which is a major factor in preventing diffuse hair thinning. Selenium and ashwagandha also assist in managing the oxidative and emotional stress that can trigger shedding.

Optimizing thyroid function is a key intervention for those with suspected endocrine-related hair loss. The use of premium mineral chelates like zinc bisglycinate ensures that essential follicle cofactors are delivered in a highly bioavailable form.

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Metabolism Boost
Impact
Highest effect
A Goal FitA+ Strength of SupportC+ CoverageA+ Formula Quality

Iodine and L-Tyrosine are paired in this formula to provide direct support for thyroid hormone production, which regulates the body's metabolic rate. These are supported by Selenium and Zinc to ensure efficient hormone conversion and metabolic function.

Thyroid health and energy production appear strongly supported by the inclusion of all essential thyroid cofactors. This professional-grade supplement addresses a core biological engine of metabolism with high-quality and bioavailable ingredients.

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Brain Health
Impact
Highest effect
A- Goal FitA Strength of SupportA- CoverageA+ Formula Quality

L-Tyrosine and Ashwagandha act as precursors and adaptogens to support cognitive function during acute mental stress.

Essential minerals like Selenium and Iodine further acts as metabolic cofactors, potentially contributing to foundational brain energy and focus.

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General Health
Impact
Highest effect
A Goal FitA- Strength of SupportB- CoverageA+ Formula Quality

A combination of Selenium, Zinc, and Iodine supports thyroid function and metabolic health. Ashwagandha extract is included as an adaptogen to help manage daily stress and resilience.

High-quality forms like Zinc Bisglycinate and L-Selenomethionine support efficient nutrient utilization. The formula appears well aligned with maintaining energy and systemic wellness through endocrine support.

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Weight Loss
Impact
Highest effect
A- Goal FitA- Strength of SupportB CoverageA+ Formula Quality

Metabolic rate is supported by providing key substrates for thyroid hormone production and management of the stress response. This strategy focuses on the hormonal drivers of energy expenditure to assist weight management.

Iodine, Selenium, and L-Tyrosine are utilized for their essential roles in thyroid health. Zinc and Ashwagandha support enzymatic processes and help modulate cortisol levels.

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Immunity
Impact
Moderate effect
D Goal FitC- Strength of SupportD CoverageB Formula Quality

This formulation contains Vitamin C, Zinc, and Selenium at concentrations primarily intended for thyroid and metabolic support. While these nutrients are foundational to immune health, the lower dosage levels may not offer the targeted assistance often required for acute defense.

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Ingredients

IngredientAmount per serving
Vitamin C (Ascorbic Acid)
 200 mg
Vitamin E (D-Alpha-Tocopheryl)
 67 mg
Vitamin B12 (Methylcobalamin)
 100 mcg
Iodine (Potassium Iodide)
 225 mcg
Zinc (Albion Zinc Bisglycinate Chelate)
 5 mg
Selenium (L-Selenomethionine)
 100 mcg
Copper (Copper Citrate)
 500 mcg
L-Tyrosine
500 mg
Ashwagandha extract
90 mg
Gluten Free Adults 18–50 Women
Report overview
Iodine (Potassium Iodide) · 225 mcg OverallScore93
A+ Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyC+ Value
This specialized thyroid support formula provides iodine from potassium iodide along with selenium and tyrosine for hormone conversion. It is an excellent, research-backed option for optimizing metabolic function.
View ingredientView products
Tyrosine · 500 mg OverallScore80
A Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyF Value
This premium thyroid formula delivers a robust 500mg dose of L-Tyrosine alongside metabolic minerals. It is a highly pure and transparent choice for thyroid support, though it is expensive per gram.
View ingredientView products
Selenium (L-Selenomethionine) · 100 mcg OverallScore77
A+ Active Ingredient Quality & BioavailabilityA- Dose, Safety & Label TransparencyF Value
This thyroid support formula uses high-quality selenium in a very transparent format, but at a lower maintenance dose. It is a premium product that is expensive for obtaining selenium alone.
View ingredientView products
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