$44.99 $0.99 per serving
Product analysis
Thyroid Strength supplies selenium, zinc and copper for normal immune function when dietary intake is low. Its selenium and tyrosine content is relatively expensive, which matters when comparing it with simpler nutrient options.
AI assessment of the formula, label and price. How scoring works
Nutrient Quality48
Selenium-enriched yeast is a favorable selenium source. The other nutrient carriers and herbal details do not establish equally clear quality advantages.
Ingredient Transparency83
All ingredient amounts are stated, making serving comparisons possible. Several herbal and nutrient form details remain unclear.
Value For Money31
The selenium and tyrosine content is relatively expensive. Uncertain value from the other ingredients leaves little basis for a strong value judgment.
Customer Satisfaction77
Customer feedback is positive across several hundred ratings. That gives useful context on satisfaction without establishing thyroid or immune outcomes.
Product Focus67
The clearest nutritional connection is selenium’s role in normal immune and antioxidant functions. The broader herbal combination does not make an additional health benefit predictable.
- Format
Tablet - Container
- 90 Tablet(s)
- Per serving
- $0.99
- Customer rating
- 4.5 · 939 ratings
Goals
Impact
High effect
Selenium · 70 mcgAshwagandha · 250 mgZinc · 8 mg
Selenium supplies a nutrient used in antioxidant enzymes, with usefulness mainly when intake is insufficient. These nutritional roles do not establish additional health benefits when intake is already adequate.
How this product is rated for Everyday Health
Ingredient fit64
The declared nutrients provide a nutritional connection to general health. Amount support varies across contributing ingredients.
Goal fit
The declared nutrients provide general nutritional connections alongside the formula’s other ingredients.
Dose adequacy
Contributing amounts provide partial support against the saved amount references; the reference comparison does not establish a clinical dose-response.
Pathways51
The strongest connection is antioxidant and immune defence. The formula also represents the areas listed below.
Depth
The strongest represented area is antioxidant and immune defence, describing nutritional roles rather than a measured improvement in health.
Breadth
The represented areas are antioxidant and immune defence.
Evidence96
Ashwagandha is the leading retained contribution. The supplied context supports nutritional availability when intake is low, without establishing added benefit with adequate intake.
Evidence strength
Ashwagandha provides the leading retained contribution; its nutritional relevance does not establish broad disease prevention.
Studied preparation
The retained preparations meet the saved checks; no superiority of chemical form or delivery follows.
Formulation logic93
The supplied iodine amount exceeds the configured high-intake check, creating a formulation concern.
Partner coverage
No required partner is missing among the retained ingredients; combining them does not establish extra health benefit.
Conflicts
The supplied iodine amount exceeds the configured high-intake check, creating a formulation concern.
Effective doses
The retained ingredients meet the amount threshold used here, which is not proof of clinical benefit.
Impact
High effect
Zinc · 8 mgSelenium · 70 mcg
Selenium and zinc contribute to normal immune function, while copper can help restore immune-cell activity when intake is inadequate. Selenium provides the more substantial contribution against the supplied serving comparisons; zinc and copper provide smaller amounts. These nutritional roles do not show that the product prevents respiratory infections or enhances immunity when nutrient intake is already sufficient.
How this product is rated for Immunity
Ingredient fit54
Three relevant minerals sit within a formula with several other purposes. Their serving amounts provide partial nutritional contributions.
Goal fit
Three relevant minerals share the formula with several other actives.
Dose adequacy
Selenium provides more of its comparison amount than zinc or copper.
Pathways42
Antioxidant balance is strongest, with less coverage of immune regulation, innate activity and barriers.
Depth
Antioxidant and inflammatory balance is the strongest saved area.
Breadth
Only antioxidant balance reaches the saved coverage threshold.
Evidence100
Zinc leads the evidence finding, while selenium's contribution remains a normal nutrient role.
Evidence strength
Zinc leads the supported nutritional evidence, without establishing infection prevention.
Studied preparation
The three mineral preparations were accepted without a form-superiority claim.
Formulation logic100
All three minerals meet the saved amount threshold; copper is present and no configured conflict applies.
Partner coverage
No required partner is missing among the three minerals.
Conflicts
Copper is present and neither configured zinc concern applies.
Effective doses
All three minerals meet the saved minimum amount threshold.
Ingredients
| Ingredient | Amount per serving | Score |
|---|---|---|
Iodine (Saccharomyces cerevisiae) | 150 mg | |
Zinc (Saccharomyces cerevisiae) | 8 mg | |
Selenium (Saccharomyces cerevisiae) | 70 mcg | |
Copper (S. cerevisiae) | 0.35 mg | |
L-Tyrosine | 300 mg | |
Holy Basil leaf extract | 250 mg | |
Sensoril Ashwagandha root & leaf extract (Withanolides) | 250 mg | |
Coleus forskohlii Root Extract | 150 mg | |
organic Kelp | 125 mg |
Ashwagandha (Withanolides) · 250 mg OverallScore85
Each serving contains 250 mg of ashwagandha leaf and root extract. The preparation is listed with 8% withanolides.
How this ingredient is rated
Composition and Label Disclosure70
The saved facts identify ashwagandha leaf and root extract with 8% withanolides.
Withanolide and Preparation Disclosure
The preparation is identified as ashwagandha leaf and root extract, with 8% withanolides.
Composition and Label Disclosure100
The serving amount and preparation are identified: 250 mg of ashwagandha leaf and root extract.
Individual Preparation Amount Disclosure
The individual ashwagandha amount is 250 mg per serving.
Commercial Price and Usability
No price comparison was evaluated for this ingredient.
Tyrosine · 300 mg OverallScore59
A serving supplies 300 mg of L-tyrosine. The whole-product price works out to about $3.33 per gram of tyrosine.
How this ingredient is rated
Active Ingredient Quality & Bioavailability70
The recorded form is L-tyrosine.
Tyrosine Chemical Form
The recorded form is L-tyrosine.
Purity and Sourcing Signals
The saved facts record no evaluated testing, grade, fermentation or GMP claim for this ingredient.
Dose, Safety & Label Transparency72
A serving supplies 300 mg of L-tyrosine.
Tyrosine Dosage Adequacy
The 300 mg per serving is rated as a moderate amount for cognitive support.
Label Transparency and Blends
The amount of tyrosine is recorded individually as 300 mg per serving.
Value10
The whole-product price works out to about $3.33 per gram of tyrosine.
Price per Gram of Tyrosine
The whole-product price works out to about $3.33 per gram of tyrosine.
Selenium (Saccharomyces cerevisiae) · 70 mcg OverallScore62
The serving supplies 70 mcg of selenium as selenium-enriched yeast. It comes from selenium-enriched yeast, a food-form matrix.
How this ingredient is rated
Active Ingredient Quality & Bioavailability81
Selenium comes from enriched yeast, a food-form matrix; no specific brand is identified in the saved facts.
Selenium Chemical Form
Selenium-enriched yeast supplies selenium in a yeast matrix.
Form Transparency & Isomer Specificity
The saved facts identify selenium-enriched yeast without a specific brand.
Dose, Safety & Label Transparency70
The serving supplies 70 mcg and leaves a margin for selenium from other sources under the evaluation.
Dosage Efficacy Sweet Spot
The 70 mcg serving is modest compared with the amount favored by the evaluation.
Safety Margin & UL Adherence
The 70 mcg serving leaves a margin for selenium from other sources under the evaluation.
Value10
The whole-product price is about $2.86 per 200 mcg of selenium, based on the listed serving and amount.
Price per 200 mcg Serving
The whole-product price is about $2.86 per 200 mcg of selenium, based on the listed serving and amount.
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Sources
Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.
- A randomized, double blind, placebo controlled study to evaluate the effects of ashwagandha (Withania somnifera) extract on sleep quality in healthy adults.
- Effects of Ashwagandha ( Withania somnifera) standardized root extract on physical endurance and VO 2max in healthy adults performing resistance training: An eight-week, prospective, randomized, double-blind, placebo-controlled study.
- Efficacy of Ashwagandha (Withania somnifera [L.] Dunal) in improving cardiorespiratory endurance in healthy athletic adults.
- Withania somnifera (L.) Dunal as Add-On Therapy for COPD Patients: A Randomized, Placebo-Controlled, Double-Blind Study.
- Effect of Ashwagandha (Withania somnifera) extract on sleep: A systematic review and meta-analysis.
- Associations of selenium status with all-cause and cause-specific mortality: a systematic review and meta-analysis of cohort studies.
- Dietary Antioxidants, Circulating Antioxidant Concentrations, Total Antioxidant Capacity, and Risk of All-Cause Mortality: A Systematic Review and Dose-Response Meta-Analysis of Prospective Observational Studies.
- The efficacy and safety of selenium supplementation versus placebo in the treatment of Graves' orbitopathy: A systematic review and meta-analysis of randomised controlled trials.
- Associations of plasma metal concentrations with the risks of all-cause and cardiovascular disease mortality in Chinese adults.
- Updates on clinical studies of selenium supplementation in radiotherapy.
- Effectiveness of sodium bicarbonate and zinc chloride mouthwashes in the treatment of oral mucositis and quality of life in patients with cancer under chemotherapy.
- Zinc supplementation in young children with acute diarrhea in India.
- Associations of mortality with ocular disorders and an intervention of high-dose antioxidants and zinc in the Age-Related Eye Disease Study: AREDS Report No. 13.
- Effects of zinc and probiotic co-supplementation on inflammation, gastrointestinal symptoms, quality of life, and mood in irritable bowel syndrome patients.
- Effect of zinc sulfate supplementation on premenstrual syndrome and health-related quality of life: Clinical randomized controlled trial.
- Effects of selenium supplementation on selenoprotein gene expression and response to influenza vaccine challenge: a randomised controlled trial.
- Effect of selenium on immune response against hepatitis B vaccine with accelerated method in insulin-dependent diabetes mellitus patients.
- Chemoprevention trial of human hepatitis with selenium supplementation in China.
- Selenium nanoparticles as adjunctive therapy in sepsis: A pilot randomized clinical trial.
- Selenium supplementation in patients with autoimmune thyroiditis decreases thyroid peroxidase antibodies concentrations.