Thyrocsin

Thyrocsin

Thorne4.8 (10,606 ratings)
Format:Capsule Quantity: 120 Capsule(s) · 60 servings
Goals

Product analysis

64 out of 100

Thyrocsin supplies iodine and other nutrients involved in normal thyroid and immune functions, with benefits most relevant when intake is low. Several additions have less certain benefits, making it harder to justify the whole mixture for one need.

AI assessment of the formula, label and price. How scoring works

Nutrient Quality52

Iodine and selenium use favorable identified forms, making those nutrient sources easier to compare. Other preparations are less fully characterized, limiting an equally clear view of the complete formula.

Ingredient Transparency92

All ingredient amounts and most forms are disclosed. Tyrosine and ashwagandha have less complete form descriptions, leaving part of the preparation unclear.

Value For Money33

Iodine provides moderate value, while selenium and tyrosine are relatively costly contributions. Value for the remaining ingredients is uncertain, making the full mixture harder to justify on price.

Customer Satisfaction92

Customer feedback is broadly positive across a large number of ratings. The volume provides a wider picture of satisfaction without proving health benefits.

Product Focus62

The clearest role is filling nutrient gaps, including iodine needed to make thyroid hormones. The mixture does not establish a metabolism boost with adequate intake, and the ashwagandha amount is below the exposure behind its limited hair findings.

Format
Capsule
Container
120 Capsule(s)
Per serving
$0.66
Customer rating
4.8 · 10,606 ratings
Report analysis

Goals

Impact
High effect
C+ Ingredient FitF PathwaysA+ EvidenceA+ Formulation Logic
Vitamin B12 · 100 mcgZinc · 5 mg

Iodine helps make thyroid hormones, which regulate metabolic rate; correcting iodine deficiency can address an impaired thyroid response, rather than accelerate a normal one. The other supplied nutrient and biomarker findings do not establish an additional routine increase in energy expenditure.

How this product is rated for Metabolism Support

Ingredient fit69

The formula includes considered ingredients alongside actives with other roles. Their amounts give uneven coverage of the saved comparison ranges.
Goal fit
The considered ingredients sit within a broader formula containing actives with other roles.
Dose adequacy
The declared amounts provide partial or uneven coverage of the saved comparison ranges, rather than demonstrating a measured metabolic-rate response.

Pathways0

No configured energy-expenditure route receives coverage from the supplied findings. No route reaches the breadth threshold.
Depth
No configured energy-expenditure route receives coverage from the supplied findings.
Breadth
No route reaches the saved coverage threshold.

Evidence96

The leading nutrient contribution reflects normal physiological or biomarker relevance; this does not establish extra energy expenditure when needs are met.
Evidence strength
The saved findings give Vitamin B12 the leading contribution, while its supplied scientific context limits claims about a routine rise in energy expenditure.
Studied preparation
The counted ingredients receive preparation recognition; this does not establish that this finished formula was tested for increased energy expenditure.

Formulation logic100

The counted ingredients pass the saved amount threshold, with no missing required partners or triggered conflicts. This does not establish a thermogenic effect from the combination.
Partner coverage
No required partner is missing for the counted ingredients; the finding does not establish additional benefit from their combination.
Conflicts
No configured ingredient conflict is triggered by the supplied facts; this does not establish complete interaction coverage or individual suitability.
Effective doses
All counted ingredients pass the saved amount threshold; passing it does not prove a thermogenic effect.
Study evidence
Iodine Mixed 17 studies
Selenium Mixed 28 studies
Zinc Supportive 12 studies
Impact
High effect
B+ Ingredient FitC PathwaysB+ EvidenceA+ Formulation Logic
Vitamin B12 · 100 mcgSelenium · 100 mcgAshwagandha · 90 mgZinc · 5 mgVitamin C · 200 mg

Selenium supports normal antioxidant enzyme function, iodine supplies a nutrient needed by the thyroid, and vitamin B12 contributes to blood formation. These contributions are most useful when intake is insufficient. Selenium has the strongest saved contribution, while the smaller zinc and vitamin C amounts did not receive credit; the supplied facts do not establish additional benefit in nutrient-replete adults.

How this product is rated for Everyday Health

Ingredient fit81

Relevant nutrients contribute to this goal, while additional actives reduce the formula's focus on the supported roles. Recognized nutrient amounts make differing contributions; some are partial rather than full amounts against the saved references.
Goal fit
Relevant nutrients contribute to this goal, while additional actives reduce the formula's focus on the supported roles.
Dose adequacy
Recognized nutrient amounts make differing contributions; some are partial rather than full amounts against the saved references.

Pathways60

Antioxidant and immune nutrient functions dominate; other recognized contributions are smaller.
Depth
The strongest recognized area is antioxidant and immune nutrient functions.
Breadth
Antioxidant and immune nutrient functions dominate; other recognized contributions are smaller.

Evidence82

Selenium drives the strongest saved evidence finding. Its supported role does not establish additional benefit above adequate nutrient intake.
Evidence strength
Selenium drives the strongest saved evidence finding. Its supported role does not establish additional benefit above adequate nutrient intake.
Studied preparation
The saved result recognizes the preparations of the ingredients meeting its amount threshold; this does not establish superiority of particular forms.

Formulation logic100

The recognized ingredients have no missing required partners, and no configured conflict was triggered. All recognized ingredients meet the saved minimum amount threshold.
Partner coverage
The recognized ingredients work independently or have their required partners; this does not establish extra benefit from combining them.
Conflicts
No configured ingredient conflict was triggered by the supplied facts; this finding is limited to the evaluated combinations.
Effective doses
All recognized ingredients meet the saved minimum amount threshold; this is not proof of a clinical response.
Study evidence
Selenium Supportive 70 studies
Vitamin C Supportive 56 studies
Zinc Supportive 60 studies
Hair Health
Impact
High effect
B- Ingredient FitC PathwaysB EvidenceA+ Formulation Logic
Zinc · 5 mgVitamin C · 200 mg

Zinc can help address low intake associated with shedding, although its amount here was too small to count in the saved findings. KSM-66 ashwagandha has limited preparation-specific hair evidence, but 90 mg per serving is below the 600 mg daily exposure used in the supplied trial. Vitamin C supports normal collagen formation without establishing independent hair regrowth.

How this product is rated for Hair Health

Ingredient fit70

The relevant nutrients are present, but some smaller amounts were excluded from the saved findings. The included amounts and the formula’s other uses determine its focus.
Goal fit
The formula includes ingredients relevant to hair nutrition alongside ingredients intended for other uses, reducing its specific focus on hair.
Dose adequacy
The declared amounts provide only partial coverage of the saved reference levels; this comparison does not establish effective hair-treatment doses.

Pathways60

The main recorded connection is follicle antioxidant protection, with limited breadth across the other tracked areas. These ingredient connections do not establish clinical outcomes.
Depth
The strongest recorded connection is follicle antioxidant protection; this describes the saved ingredient mapping, not demonstrated hair improvement.
Breadth
Only the antioxidant pathway reached the saved coverage threshold, so the recorded coverage is narrow.

Evidence76

Vitamin B12 leads the saved evidence finding. The supplied scientific limitations still determine which hair benefits can reasonably be described.
Evidence strength
Vitamin B12 leads the saved evidence finding, but its recognition does not establish routine regrowth or benefit beyond the supplied limitations.
Studied preparation
The saved preparation comparison recognizes the included forms except iodine; this does not demonstrate clinical hair benefit from the full formula.

Formulation logic100

No required partner was missing and no configured conflict was found. The retained ingredients meet the minimum amount criterion without establishing synergy or overall safety.
Partner coverage
No missing required partner was identified for the ingredients included in this finding; no added benefit from combining them is established.
Conflicts
No configured ingredient conflict was identified; this finding does not establish overall safety or individual suitability.
Effective doses
All ingredients retained in this comparison meet its minimum amount criterion; smaller or excluded ingredients do not become proven ineffective.
Study evidence
Copper Adverse 4 studies
Iodine No effect 1 study
Selenium Disputed 7 studies
Vitamin E No effect 3 studies
Zinc Supportive 22 studies
Immunity
Impact
High effect
B Ingredient FitC PathwaysA- EvidenceA+ Formulation Logic
Vitamin C · 200 mgZinc · 5 mgSelenium · 100 mcg

Selenium supports normal immune function, without establishing added protection against infections when intake is adequate. Copper and Vitamin B12 can help restore immune-cell function when intake is low.

How this product is rated for Immunity

Ingredient fit75

The recognized nutrients supply the main connection to immunity, with the formula’s other purposes affecting its focus.
Goal fit
The recognized nutrients supply the main connection to immunity, with the formula’s other purposes affecting its focus.
Dose adequacy
Lower amounts of Vitamin C and Zinc do not contribute to the saved main findings; the remaining relevant amounts contribute unevenly.

Pathways60

The strongest saved finding concerns oxidative and inflammatory balance. Coverage also reflects oxidative and inflammatory balance.
Depth
The strongest saved finding concerns oxidative and inflammatory balance. This describes the pattern of ingredient contributions, not a measured clinical effect.
Breadth
Meaningful saved coverage includes oxidative and inflammatory balance.

Evidence85

Selenium has support for normal nutrient function, rather than demonstrated additional infection prevention.
Evidence strength
Selenium has support for normal nutrient function, rather than demonstrated additional infection prevention.
Studied preparation
The qualifying preparations are recognized in the saved findings; this does not establish superiority over alternative forms.

Formulation logic100

The qualifying ingredients can contribute independently and meet the saved amount criterion. No configured ingredient conflict was identified.
Partner coverage
The qualifying ingredients can contribute without an additional required partner; the finding does not establish synergy.
Conflicts
No configured ingredient conflict was identified in the supplied findings.
Effective doses
The qualifying ingredients meet the saved minimum amount criterion. This is a comparison threshold, not a proven clinical effective dose.
Study evidence
Selenium Mixed 37 studies
Vitamin C Supportive 53 studies
Vitamin E Supportive 21 studies
Zinc Supportive 73 studies
Brain Health
Impact
Lower effect
D- Ingredient FitF PathwaysC EvidenceA+ Formulation Logic
Vitamin B12 · 100 mcgAshwagandha · 90 mg
Study evidence
Tyrosine Supportive 7 studies
Zinc Supportive 38 studies
Energy
Impact
Lower effect
C+ Ingredient FitF PathwaysF EvidenceA+ Formulation Logic
Iodine · 225 mcgVitamin B12 · 100 mcg
Study evidence
Iodine Adverse 3 studies

Ingredients

IngredientAmount per servingScore
Vitamin C (Ascorbic Acid)
200 mg
Vitamin E (D-Alpha-Tocopheryl)
67 mg
Vitamin B12 (Methylcobalamin)
100 mcg
Iodine (Potassium Iodide)
225 mcg 90
Zinc (Albion Zinc Bisglycinate Chelate)
5 mg
Selenium (L-Selenomethionine)
100 mcg 77
Copper (Copper Citrate)
500 mcg
L-Tyrosine
500 mg 70
Ashwagandha extract
90 mg 65
Gluten Free Adults 18–50 Women
Report overview
A+ Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyD+ Value
Each serving provides 225 mcg iodine from potassium iodide. A whole-product serving costs about $0.67.
How this ingredient is rated

Active Ingredient Quality & Bioavailability100

The iodine comes from potassium iodide, a form regarded favorably in the evaluation.
Iodine Form & Bioavailability
Potassium iodide is the identified iodine form, which the evaluation regards favorably.
Marine Source Purity & Sourcing
No marine source is recorded in the saved facts, so the evaluation does not flag seaweed sourcing for this iodine.

Dose, Safety & Label Transparency100

The iodine amount is specified at 225 mcg per serving. The evaluation does not flag it as above its safety limit.
Dosage Efficacy for Daily Support
A serving provides 225 mcg iodine.
Dosage Safety & Upper Limits
The evaluation does not flag the 225 mcg of iodine in a serving as above its safety limit.
Elemental Iodine Transparency
The saved facts state an iodine amount of 225 mcg per serving.

Value50

A whole-product serving costs about $0.67.
Price Per Effective Serving
A whole-product serving costs about $0.67.
Tyrosine · 500 mg OverallScore70
B- Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyF Value
Each serving lists 500 mg of L-tyrosine. The whole-product price is about $1.33 per gram of tyrosine.
How this ingredient is rated

Active Ingredient Quality & Bioavailability70

The ingredient is identified as L-tyrosine. The saved facts contain no further tyrosine-specific sourcing, testing, or purity details.
Tyrosine Chemical Form
The ingredient is identified as L-tyrosine.
Purity and Sourcing Signals
The saved facts contain no further tyrosine-specific sourcing, testing, or purity details.

Dose, Safety & Label Transparency100

The stated amount is 500 mg of L-tyrosine per serving. 500 mg per serving aligns with the evaluation's cognitive-support amount criterion.
Tyrosine Dosage Adequacy
500 mg per serving aligns with the evaluation's cognitive-support amount criterion.
Label Transparency and Blends
The stated amount is 500 mg of L-tyrosine per serving.

Value10

The whole-product price is about $1.33 per gram of tyrosine.
Price per Gram of Tyrosine
The whole-product price is about $1.33 per gram of tyrosine.
A+ Active Ingredient Quality & BioavailabilityA- Dose, Safety & Label TransparencyF Value
Each serving provides 100 mcg of selenium as L-selenomethionine. Based on the whole-product price, the equivalent of 200 mcg of selenium costs about $1.33.
How this ingredient is rated

Active Ingredient Quality & Bioavailability100

L-selenomethionine is an identified organic form that the evaluation treats favorably.
Selenium Chemical Form
L-selenomethionine is an organic form the evaluation treats favorably.
Form Transparency & Isomer Specificity
The saved facts identify the specific L form.

Dose, Safety & Label Transparency88

The serving provides 100 mcg of selenium. The evaluation finds a margin for selenium from food, which also contributes to total intake.
Dosage Efficacy Sweet Spot
The serving provides 100 mcg of selenium, a moderate amount in the evaluation.
Safety Margin & UL Adherence
The evaluation finds a margin for selenium from food at the listed serving amount; intake from other sources also counts.

Value10

Based on the whole-product price, the equivalent of 200 mcg of selenium costs about $1.33.
Price per 200 mcg Serving
Based on the whole-product price, the equivalent of 200 mcg of selenium costs about $1.33.
Report alternatives

Sources

Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.

  1. Acute and Repeated Ashwagandha Supplementation Improves Markers of Cognitive Function and Mood.
    Leonard M; Dickerson B; Estes L; Gonzalez DE; Jenkins V; Johnson S; Xing D; Yoo C; Ko J; Purpura M; Jäger R; Faries M; Kephart W; Sowinski R; Rasmussen CJ; Kreider RB · Nutrients · 2024
    Randomized trial59 participantsBrain Health Energy forAshwagandha
  2. Effect of ashwagandha (Withania somnifera) extract with Sominone (Somin-Onâ„¢) to improve memory in adults with mild cognitive impairment: A randomized, double-blind, placebo-controlled study.
    Rai HP; Mishra DN · Journal of psychopharmacology (Oxford, England) · 2025
    Randomized trial40 participantsBrain Health forAshwagandha
  3. Efficacy of Withania somnifera supplementation on adult's cognition and mood.
    Remenapp A; Coyle K; Orange T; Lynch T; Hooper D; Hooper S; Conway K; Hausenblas HA · Journal of Ayurveda and integrative medicine · 2022
    Randomized trial60 participantsBrain Health forAshwagandha
  4. A clinical assessment of the therapeutic effects of Ashwagandha root extract on cognitive performance, sleep, and fatigue in children aged 6-12 years.
    Saxena A; Lopresti A; Sharif M; Elon N; Suri R; Langade DK · Frontiers in nutrition · 2026
    Randomized trial85 participantsBrain Health forAshwagandha
  5. Efficacy and Safety of Ashwagandha Root Extract on Cognitive Functions in Healthy, Stressed Adults: A Randomized, Double-Blind, Placebo-Controlled Study.
    Gopukumar K; Thanawala S; Somepalli V; Rao TSS; Thamatam VB; Chauhan S · Evidence-based complementary and alternative medicine : eCAM · 2022
    Randomized trial130 participantsBrain Health forAshwagandha
  6. Combined L-carnosine and L-tyrosine supplementation as an ergogenic strategy for physical and cognitive performance under fatigue in professional football players.
    Bilgin S; Bozyılan E; Buzdağlı Y; Karaç Öcal Y; Gürkan O; Toktaş S; İnan H; Egil İ; Yarayan YE · Frontiers in nutrition · 2026
    Randomized trial24 participantsBrain Health forTyrosine
  7. Effect of tyrosine supplementation on clinical and healthy populations under stress or cognitive demands--A review.
    Jongkees BJ; Hommel B; Kühn S; Colzato LS · Journal of psychiatric research · 2016
    Narrative reviewBrain Health forTyrosine
  8. Influence of nutritional tyrosine on cognition and functional connectivity in healthy old humans.
    Hensel C; Becker M; Düzel S; Demuth I; Norman K; Steinhagen-Thiessen E; Gallinat J; Lindenberger U; Kühn S · NeuroImage · 2019
    Cross-sectional study286 participantsBrain Health forTyrosine
  9. Dietary Tyrosine Intake (FFQ) Is Associated with Locus Coeruleus, Attention and Grey Matter Maintenance: An MRI Structural Study on 398 Healthy Individuals of the Berlin Aging Study-II.
    Plini ERG; Melnychuk MC; Harkin A; Dahl MJ; McAuslan M; Kühn S; Boyle RT; Whelan R; Andrews R; Düzel S; Drewelies J; Wagner GG; Lindenberger U; Norman K; Robertson IH; Dockree PM · The journal of nutrition, health & aging · 2023
    Cross-sectional study398 participantsBrain Health forTyrosine
  10. Baseline-dependent effect of dopamine's precursor L-tyrosine on working memory gating but not updating.
    Jongkees BJ · Cognitive, affective & behavioral neuroscience · 2021
    Randomized trial45 participantsBrain Health forTyrosine
  11. Relationship between vitamin B12 levels and motor development: A systematic review.
    Dos Santos MERA; da Silva KG; da Silva Souza AP; da Silva ABJ; da Silva RF; da Silva EHA; de Souza SL; Barros WMA · Clinical nutrition ESPEN · 2024
    Systematic review1,559 participants8 studies pooledBrain Health forVitamin B12
  12. Vitamin B12 supplementation improves cognitive function in middle aged and elderly patients with cognitive impairment.
    Zhou L; Bai X; Huang J; Tan Y; Yang Q · Nutricion hospitalaria · 2023
    Randomized trial115 participantsBrain Health forVitamin B12
  13. Structural and Functional Brain Changes Associated with Vitamin B12 Deficiency using Magnetic Resonance Imaging: A Systematic Review and Meta-analysis.
    Alghamdi A · Current medical imaging · 2023
    Meta-analysis12 studies pooledBrain Health forVitamin B12
  14. Maternal vitamin B12, vitamin D, and folic acid status during pregnancy and child neurodevelopment: a systematic review.
    Franco L; de Andrade CVF; Margini LV; Sousa N · Frontiers in neuroscience · 2026
    Systematic review22 studies pooledBrain Health forVitamin B12
  15. Higher vitamin B12 from mid- to late life is related to slower rates of cognitive decline.
    Marino FR; Rogers G; Miller JW; Selhub J; Mez J; Crane PK; Mukherjee S; Saykin AJ; Hohman TJ; Trittschuh EH; Au R; Jacques PF; Hwang PH · Alzheimer's & dementia : the journal of the Alzheimer's Association · 2025
    Cohort study1,994 participantsBrain Health forVitamin B12
  16. Efficacy of Zinc Supplement in Minimal hepatic Encephalopathy: A prospective, Randomized Controlled Study (Zinc-MHE Trial).
    Janyajirawong R; Vilaichone RK; Sethasine S · Asian Pacific journal of cancer prevention : APJCP · 2021
    Randomized trial69 participantsBrain Health forZinc
  17. A preliminary report: effects of zinc and micronutrient repletion on growth and neuropsychological function of urban Chinese children.
    Penland JG; Sandstead HH; Alcock NW; Dayal HH; Chen XC; Li JS; Zhao F; Yang JJ · Journal of the American College of Nutrition · 1997
    Randomized trial372 participantsBrain Health forZinc
  18. Association between zinc deficiency and cognitive decline in community-dwelling older adults.
    Marchetti MF; Silva GMD; Freiria CN; Borim FSA; Brito TRP; Milanski M; Corona LP · Ciencia & saude coletiva · 2022
    Cross-sectional study591 participantsBrain Health forZinc
  19. Zinc status, psychological and nutritional assessment in old people recruited in five European countries: Zincage study.
    Marcellini F; Giuli C; Papa R; Gagliardi C; Dedoussis G; Herbein G; Fulop T; Monti D; Rink L; Jajte J; Mocchegiani E · Biogerontology · 2007
    Cross-sectional study853 participantsBrain Health forZinc
  20. Zinc alleviates stroke development through autophagy-mediated modulation of immune microenvironment.
    Qiu Z; Liu X; Li J; Yin H; Luo J; Lin Z; Rexiati M; Abulaiti A; Yasen A; Xing L; Aili D; Meng B; Li X; You Z; He J; Huang C; Qian Z; Chen J · Frontiers in immunology · 2025
    OtherBrain Health forZinc