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Thyroid Synergy

Designs for Health
4.9
★ ★ ★ ★ ★
(176 ratings)
Manganese 5 mg
Zinc 25 mg
Vitamin A 2000 IU
Chromium 50 mcg
Product Image
Score72
A well-constructed thyroid-focused blend with favorable mineral forms and meaningful supporting actives. Iodine, forskolin, and long-term mineral balance require deliberate use.
How scoring works
Quantity:120 Capsule(s) • (60 servings)
Goals:
Immunity
General Health
Testosterone Support
Hair Health

Score 72

A well-constructed thyroid-focused blend with favorable mineral forms and meaningful supporting actives. Iodine, forskolin, and long-term mineral balance require deliberate use.
How scoring works
$49.99($0.83 per serving)
iHerb
$ 49.99
Pure Formulas
$ 49.99
Report prices

Analysis

Iodine, selenium, tyrosine, and active riboflavin provide a coherent nutrient base for normal thyroid hormone production and metabolism. Chelated zinc, copper, manganese, and chromium add well-defined trace-mineral support.

American ginseng and forskolin broaden the formula toward energy and metabolic signaling, but standardization details are incomplete. The relatively high zinc and manganese amounts also deserve attention during extended use, especially because copper is modest by comparison.

The capsules best fit users pursuing a specific thyroid-support strategy rather than a general multivitamin. Their relevance to hair, skin, immunity, vision, and testosterone is mostly indirect and depends on an underlying thyroid or nutrient need.

Who is it for
  • Adults seeking a specialized thyroid-support formula
  • Users who value chelated mineral forms
  • People coordinating thyroid supplements with a clinician
Best for
  • Targeted thyroid nutrient support
  • Trace-mineral intake
  • Thyroid-related energy and hair concerns

Pros

  • Chelated zinc, copper, manganese, and chromium
  • Includes iodine and selenomethionine
  • Active riboflavin form
  • Clearly stated active amounts

Cons

  • More specialized than a general wellness product
  • Low copper relative to zinc
  • Botanical standardization is incomplete
  • High recurring serving cost

Warnings

  • Iodine may aggravate some thyroid disorders or conflict with thyroid-medicine management.
  • Forskolin may compound blood-pressure-lowering medicines and can cause light-headedness.
  • Long-term zinc and manganese intake from this product should be considered alongside other supplements.

Nutrient quality

81 Highest impact

Chelated zinc, copper, manganese, chromium, active riboflavin, and selenomethionine provide strong form quality. Several minerals and ginseng are meaningful, while chromium and tyrosine are modest.

.

Ingredient transparency

78 High impact

All meaningful active amounts are clearly disclosed. The supplied data does not include a complete inactive ingredient list.

.

Customer satisfaction

67 High impact

The aggregate satisfaction measure is strong, but the limited volume reduces confidence. Missing feedback themes leave recurring complaints and purpose fit uncertain.

.

Value for money

59 Moderate impact

The price is only partly justified by the formula quality and dose. Each serving provides only moderate cost efficiency.

.
Report analysis

Goals

Immunity
Immunity
Impact
Highest effect
B+ Goal FitA Strength of SupportB+ CoverageB- Formula Quality
Zinc · 25 mgVitamin A · 2000 IUSelenium · 50 mcg

Well-absorbed zinc, vitamin A, and selenium provide direct support for immune cells, mucosal barriers, and antioxidant enzymes. The zinc amount is meaningful and paired with copper for mineral balance.

The broader formula is designed around thyroid and metabolic support, so several ingredients are only indirectly relevant to immunity. Iodine, tyrosine, ginseng, and forskolin may also be unsuitable for people with some thyroid conditions or thyroid-medicine regimens.

Study evidence
Selenium Mixed 37 studies
Vitamin A Supportive 107 studies
Zinc Supportive 73 studies
General Health
General Health
Impact
High effect
B- Goal FitA- Strength of SupportB CoverageB+ Formula Quality
Selenium · 50 mcgZinc · 25 mg

A well-disclosed mineral core supports several normal thyroid-related and antioxidant functions. Chelated zinc and balancing copper improve the logic of the concentrated nutrient combination.

The botanical and tyrosine additions make the formula more specialized than a general daily wellness product. Iodine and forskolin may be unsuitable for people with thyroid disorders or thyroid medication unless use is coordinated with a clinician.

Study evidence
Selenium Supportive 70 studies
Zinc Supportive 60 studies
Testosterone Support
Testosterone Support
Impact
High effect
B- Goal FitA+ Strength of SupportC CoverageC Formula Quality
Zinc · 25 mg

Zinc provides a relevant route to testosterone support. The disclosed amount appears meaningful for that focused role.

The formula remains narrow rather than comprehensive. Thyroid Synergy is best viewed as targeted support rather than proof of a clinical benefit.

Study evidence
Zinc Disputed 7 studies
Hair Health
Hair Health
Impact
High effect
C Goal FitA- Strength of SupportB- CoverageB- Formula Quality
Zinc · 25 mg

Zinc, selenium, iodine, vitamin A, copper, and thyroid-related actives may support hair when a thyroid or nutrient issue is present. The formula is situational rather than broadly hair targeted, and its botanicals lack direct evidence for hair growth.

TRAACS mineral chelates and selenomethionine improve quality, while zinc is substantial and only modestly balanced by copper. Iodine and thyroid-directed botanicals may be unsuitable for some thyroid conditions or thyroid medicines without clinician-guided use.

Study evidence
Copper Adverse 4 studies
Iodine No effect 1 study
Selenium Disputed 7 studies
Vitamin A Disputed 13 studies
Zinc Supportive 22 studies
Vision Support
Vision Support
Impact
Moderate effect
C- Goal FitB- Strength of SupportD+ CoverageD Formula Quality
Zinc · 25 mgCopper · 500 mcgVitamin A · 2000 IU

Vitamin A, zinc, and selenium contribute to retinal function and antioxidant protection, but the formula is designed for thyroid support rather than vision. It lacks lutein, zeaxanthin, and omega-3 structural lipids.

Chelated minerals are clearly named, though the 25 mg zinc dose is paired with only 0.5 mg copper. Iodine, forskolin, and thyroid-focused ingredients may be unsuitable with some thyroid conditions or medicines.

Study evidence
Copper Supportive 7 studies
Selenium Supportive 15 studies
Vitamin A Supportive 65 studies
Zinc Supportive 39 studies
Skin Health
Skin Health
Impact
Moderate effect
D Goal FitC+ Strength of SupportD- CoverageF Formula Quality
Zinc · 25 mgCopper · 500 mcgSelenium · 50 mcg

Zinc and vitamin A have skin relevance, but the thyroid-focused formula is only indirectly aligned. These nutrients have established skin biology, while tyrosine, ginseng, and forskolin lack strong evidence for visible skin outcomes.

Zinc is meaningfully dosed, while vitamin A is modest and most other ingredients target thyroid function. Chelated zinc and trace minerals are favorable forms, though the dry vitamin A capsule lacks a lipid carrier.

Study evidence
Vitamin A Supportive 106 studies
Zinc Supportive 66 studies

Ingredients

IngredientAmount per serving
Vitamin A (Vitamin A Palmitate)
 2000 IU
Riboflavin (Riboflavin 5-Phosphate, Vitamin B2)
 5 mg
Iodine (Potassium Iodide)
 100 mcg
Zinc (TRAACS Zinc Glycinate Chelate)
 25 mg
Selenium (Selenomethionine)
 50 mcg
Copper (TRAACS Copper Glycinate Chelate)
 500 mcg
Manganese (TRAACS Manganese Glycinate Chelate)
 5 mg
Chromium (TRAACS Chromium Nicotinate Glycinate Chelate)
 50 mcg
N-Acetyl L-Tyrosine
200 mg
American Ginseng (Ginsenosides)
 200 mg
ForsLean(R) Extract (Forskolin)
 50 mg
Gluten Free Adults 18–50
Report overview
Manganese (TRAACS Manganese Glycinate Chelate) · 5 mg OverallScore90
A+ Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyD+ Value

A fully chelated manganese form and a target-range dose make the mineral component well designed. The elemental amount is clear, and the broader formula includes several complementary trace minerals. Its high serving cost is partly justified by those premium cofactors, although it is not an economical manganese-only choice.

View ingredientView products
Zinc (TRAACS Zinc Glycinate Chelate) · 25 mg OverallScore85
A+ Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyF Value

TRAACS zinc glycinate provides a well-absorbed form, while vegetarian capsules offer a practical delivery method. The 25 mg dose is appropriately balanced by included copper. Serving cost is high for the delivered dose.

View ingredientView products
Vitamin A (Vitamin A Palmitate) · 2000 IU OverallScore55
F Active Ingredient Quality & BioavailabilityA- Dose, Safety & Label TransparencyF Value

The label clearly discloses a moderate dose of retinyl palmitate. That preformed form is less bio-regulated than carotenoids, and the dry capsule lacks a lipid carrier. The broad thyroid-focused formula is costly when judged only as a vitamin A source.

View ingredientView products
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92 Performance

Trace Minerals

Thorne
<p>L-selenomethionine and branded mineral chelates provide stronger trace-mineral form quality and meaningful maintenance amounts. Iodine, tyrosine, ginseng, and forskolin are absent, so the improvement is mineral precision rather than complete thyroid-pathway coverage.</p>
81 Performance

Only Trace Minerals

Life Extension
<p>Monomethionine, bisglycinate, and glycinate forms strengthen zinc, chromium, manganese, and copper coverage. Chromium is unusually concentrated and the formula lacks iodine and tyrosine, making it a specialized trace-mineral option rather than a direct thyroid substitute.</p>
76 Performance

Blood Sugar Defense

KAL
<p>Chromium, cinnamon, alpha-lipoic acid, gymnema, fenugreek, and bitter melon provide a coherent metabolism-focused design. It does not supply the original’s iodine and tyrosine, and combined glucose-lowering ingredients can compound diabetes medicines, so the formula fits glycemic support rather than thyroid support.</p>
78 Budget

One Daily Men's Health

Equate
<p>It costs far less per serving and provides broad vitamins and minerals for everyday maintenance. Chemical forms are mostly missing and it does not include the original’s iodine, tyrosine, ginseng, or forskolin strategy, so it is a general multivitamin rather than direct thyroid support.</p>
79 Budget

Women's Daily Multi Formula

Mason Natural
<p>Broad vitamins and minerals, including vitamin D3, iron, calcium, and zinc, come at a much lower serving cost. Basic mineral forms and calcium-iron competition are drawbacks, while the formula omits the original’s tyrosine, ginseng, and forskolin.</p>
74 Budget

High Bioactivity Life Minerals

Source Naturals
<p>A broad mineral profile uses several useful forms at a substantially lower serving cost. It lacks iodine, tyrosine, ginseng, and forskolin, but offers economical mineral coverage when the original’s thyroid-focused botanicals are not required.</p>
77 Value

One Daily Men's Health with Lycopene

21st Century
<p>Broad daily vitamins and minerals come at a very low serving cost and cover more routine nutrient gaps. Oxide and synthetic forms reduce quality, while the absence of tyrosine, ginseng, and forskolin means the value advantage applies only to general maintenance.</p>
76 Value

Mini-Multi

Carlson
<p>A broad one-daily vitamin profile uses several useful forms at a low serving cost. Calcium and magnesium are too small for meaningful bone support and the thyroid-focused actives are absent, but it offers stronger general multivitamin value.</p>
74 Value

PreserVision AREDS Soft Gels

Bausch & Lomb
<p>Substantial antioxidants and zinc provide focused vision and immune nutrient support at lower serving cost. Beta-carotene is unsuitable for current or former smokers and the formula lacks thyroid-specific iodine and tyrosine, so it is valuable only for a different, eye-focused need.</p>
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Sources

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

  1. Associations of selenium status with all-cause and cause-specific mortality: a systematic review and meta-analysis of cohort studies.
    Cui Z; Xie R; Lu X; Schomburg L; Brenner H; Schöttker B · Redox biology · 2025
    Meta-analysis95 participants20 studies pooledGeneral Health forSelenium
  2. 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.
    Jayedi A; Rashidy-Pour A; Parohan M; Zargar MS; Shab-Bidar S · Advances in nutrition (Bethesda, Md.) · 2019
    Meta-analysis507,251 participants41 studies pooledGeneral Health forSelenium
  3. 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.
    Sharabati I; Qafesha RM; Hindawi MD; Amro S; Ayesh BM · Clinical endocrinology · 2024
    Meta-analysis4 studies pooledGeneral Health Vision Support forSelenium
  4. Associations of plasma metal concentrations with the risks of all-cause and cardiovascular disease mortality in Chinese adults.
    Shi L; Yuan Y; Xiao Y; Long P; Li W; Yu Y; Liu Y; Liu K; Wang H; Zhou L; Yang H; Li X; He M; Wu T · Environment international · 2021
    Cohort study6,155 participantsGeneral Health forSelenium
  5. Updates on clinical studies of selenium supplementation in radiotherapy.
    Puspitasari IM; Abdulah R; Yamazaki C; Kameo S; Nakano T; Koyama H · Radiation oncology (London, England) · 2015
    Systematic review16 studies pooledGeneral Health forSelenium
  6. Effectiveness of sodium bicarbonate and zinc chloride mouthwashes in the treatment of oral mucositis and quality of life in patients with cancer under chemotherapy.
    Mohammadi F; Oshvandi K; Kamallan SR; Khazaei S; Ranjbar H; Ahmadi-Motamayel F; Gillespie M; Jenabi E; Vafaei SY · Nursing open · 2022
    Randomized trial144 participantsGeneral Health forZinc
  7. Zinc supplementation in young children with acute diarrhea in India.
    Sazawal S; Black RE; Bhan MK; Bhandari N; Sinha A; Jalla S · The New England journal of medicine · 1995
    Randomized trial937 participantsGeneral Health forZinc
  8. 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.
    Clemons TE; Kurinij N; Sperduto RD; AREDS Research Group · Archives of ophthalmology (Chicago, Ill. : 1960) · 2004
    Randomized trial4,753 participantsGeneral Health forZinc
  9. Effects of zinc and probiotic co-supplementation on inflammation, gastrointestinal symptoms, quality of life, and mood in irritable bowel syndrome patients.
    Rezazadegan M; Soheilipour M; Amani R · Scientific reports · 2026
    Randomized trial84 participantsGeneral Health forZinc
  10. Effect of zinc sulfate supplementation on premenstrual syndrome and health-related quality of life: Clinical randomized controlled trial.
    Siahbazi S; Behboudi-Gandevani S; Moghaddam-Banaem L; Montazeri A · The journal of obstetrics and gynaecology research · 2018
    Randomized trial142 participantsGeneral Health forZinc
  11. Menkes disease and response to copper histidine: An Indian case series.
    Yoganathan S; Sudhakar SV; Arunachal G; Thomas M; Subramanian A; George R; Danda S · Annals of Indian Academy of Neurology · 2022
    Case series4 participantsHair Health forCopper
  12. Trace element levels in alopecia areata.
    Bhat YJ; Manzoor S; Khan AR; Qayoom S · Indian journal of dermatology, venereology and leprology · 2009
    Case-control study100 participantsHair Health forCopper
  13. UV damage to hair and the effect of antioxidants and metal chelators.
    Millington KR; Marsh JM · International journal of cosmetic science · 2021
    In vitro / ex vivo studyHair Health forCopper
  14. Preserving fibre health: reducing oxidative stress throughout the life of the hair fibre.
    Marsh JM; Davis MG; Lucas RL; Reilman R; Styczynski PB; Li C; Mamak M; McComb DW; Williams RE; Godfrey S; Navqi KR; Chechik V · International journal of cosmetic science · 2016
    In vitro / ex vivo studyHair Health forCopper
  15. [Evaluation of the role of dietary intake in the occurrence of alopecia].
    El Fékih N; Kamoun H; Fazaa B; El Ati J; Zouari B; Kamoun MR; Gaigi S · Revue medicale de Liege · 2010
    Case-control study272 participantsHair Health forIodine
  16. Beyond Efficacy: 0.6% Selenium Disulfide Shampoo Matches 2% Ketoconazole for Seborrheic Dermatitis with Superior Cosmesis.
    Farris PK; Barbosa V; Houshman EB; Kovylkina N · Journal of drugs in dermatology : JDD · 2026
    Randomized trial87 participantsHair Health forSelenium
  17. Selenium Disulfide-based shampoo applied for 4 weeks significantly improves dandruff and seborrheic dermatitis.
    Turcu G; Artenie C; Nowicka D; Arenbergerová M; Lazaridou E; Khobzei K; Ataseven A; Part M; Leclerc-Mercier S · European journal of dermatology : EJD · 2023
    Observational study1,407 participantsHair Health forSelenium
  18. A Comparative Randomized Clinical Study Assessing the Efficacy of a 1% Selenium Disulfide-Based Shampoo versus 2% Ketoconazole Shampoo in Subjects with Moderate to Severe Scalp Seborrheic Dermatitis.
    Barbosa V; Melo DF; Vañó-Galván S; Lutchmanen-Kolanthan V; Sant'Anna B; Leclerc-Mercier S; Reygagne P · Skin appendage disorders · 2025
    Randomized trial64 participantsHair Health forSelenium
  19. Changes of serum trace elements level in patients with alopecia areata: A meta-analysis.
    Jin W; Zheng H; Shan B; Wu Y · The Journal of dermatology · 2018
    Meta-analysis764 participantsHair Health forSelenium
  20. Scientific opinion on the tolerable upper intake level for selenium.
    EFSA Panel on Nutrition, Novel Foods and Food Allergens (NDA); Turck D; Bohn T; Castenmiller J; de Henauw S; Hirsch-Ernst KI; Knutsen HK; Maciuk A; Mangelsdorf I; McArdle HJ; Peláez C; Pentieva K; Siani A; Thies F; Tsabouri S; Vinceti M; Aggett P; Crous Bou M; Cubadda F; Ciccolallo L; de Sesmaisons Lecarré A; Fabiani L; Titz A; Naska A · EFSA journal. European Food Safety Authority · 2023
    Systematic reviewHair Health forSelenium
  21. Topical tretinoin for hair growth promotion.
    Bazzano GS; Terezakis N; Galen W · Journal of the American Academy of Dermatology · 1986
    Non-randomized trial56 participantsHair Health forVitamin A
  22. A review of isotretinoin in the treatment of frontal fibrosing alopecia.
    Shahpar A; Nezhad NZ; Sahaf AS; Ahramiyanpour N · Journal of cosmetic dermatology · 2024
    Systematic review232 participants15 studies pooledHair Health forVitamin A
  23. Efficacy of Isotretinoin and Acitretin in Treatment of Frontal Fibrosing Alopecia: Retrospective Analysis of 54 Cases.
    Rakowska A; Gradzińska A; Olszewska M; Rudnicka L · Journal of drugs in dermatology : JDD · 2018
    Cohort study54 participantsHair Health forVitamin A
  24. Systemic Treatments for Lichen Planopilaris and Frontal Fibrosing Alopecia: A Retrospective Study of 315 Patients.
    Willaert M; Van Dongen T; Dikrama P; Nijsten T; Hijnen D; Waalboer-Spuij R · Acta dermato-venereologica · 2025
    Cohort study315 participantsHair Health forVitamin A
  25. Tretinoin enhances minoxidil response in androgenetic alopecia patients by upregulating follicular sulfotransferase enzymes.
    Sharma A; Goren A; Dhurat R; Agrawal S; Sinclair R; Trüeb RM; Vañó-Galván S; Chen G; Tan Y; Kovacevic M; Situm M; McCoy J · Dermatologic therapy · 2020
    Single-arm trialHair Health forVitamin A
  26. The effects of minoxidil, 1% pyrithione zinc and a combination of both on hair density: a randomized controlled trial.
    Berger RS; Fu JL; Smiles KA; Turner CB; Schnell BM; Werchowski KM; Lammers KM · The British journal of dermatology · 2003
    Randomized trial200 participantsHair Health forZinc
  27. Incubatory environment of the scalp impacts pre-emergent hair to affect post-emergent hair cuticle integrity.
    Schwartz JR; Henry JP; Kerr KM; Flagler MJ; Page SH; Redman-Furey N · Journal of cosmetic dermatology · 2018
    Randomized trialHair Health forZinc
  28. A comparison of hair quality and cosmetic acceptance following the use of two anti-dandruff shampoos.
    Draelos ZD; Kenneally DC; Hodges LT; Billhimer W; Copas M; Margraf C · The journal of investigative dermatology. Symposium proceedings · 2006
    Randomized trial40 participantsHair Health forZinc
  29. BMI and levels of zinc, copper in hair, serum and urine of Turkish male patients with androgenetic alopecia.
    Ozturk P; Kurutas E; Ataseven A; Dokur N; Gumusalan Y; Gorur A; Tamer L; Inaloz S · Journal of trace elements in medicine and biology : organ of the Society for Minerals and Trace Elements (GMS) · 2015
    Case-control study216 participantsHair Health forZinc
  30. Analysis of serum zinc and copper concentrations in hair loss.
    Kil MS; Kim CW; Kim SS · Annals of dermatology · 2013
    Case-control study342 participantsHair Health forZinc
  31. Effects of selenium supplementation on selenoprotein gene expression and response to influenza vaccine challenge: a randomised controlled trial.
    Goldson AJ; Fairweather-Tait SJ; Armah CN; Bao Y; Broadley MR; Dainty JR; Furniss C; Hart DJ; Teucher B; Hurst R · PloS one · 2011
    Randomized trial119 participantsImmunity forSelenium
  32. Effect of selenium on immune response against hepatitis B vaccine with accelerated method in insulin-dependent diabetes mellitus patients.
    Janbakhsh A; Mansouri F; Vaziri S; Sayad B; Afsharian M; Rahimi M; Shahebrahimi K; Salari F · Caspian journal of internal medicine · 2013
    Randomized trial62 participantsImmunity forSelenium
  33. Chemoprevention trial of human hepatitis with selenium supplementation in China.
    Yu SY; Li WG; Zhu YJ; Yu WP; Hou C · Biological trace element research · 1990
    Non-randomized trial20,847 participantsImmunity forSelenium
  34. Selenium nanoparticles as adjunctive therapy in sepsis: A pilot randomized clinical trial.
    Gu WJ; Huang W; Zhao FZ; Yuan XK; Jin K; Chen JL; Zhang CY; Huang Y; He L; Zhuang H; Yin HY; Chen T · Drug resistance updates : reviews and commentaries in antimicrobial and anticancer chemotherapy · 2026
    Randomized trial70 participantsImmunity forSelenium
  35. Selenium supplementation in patients with autoimmune thyroiditis decreases thyroid peroxidase antibodies concentrations.
    Gärtner R; Gasnier BC; Dietrich JW; Krebs B; Angstwurm MW · The Journal of clinical endocrinology and metabolism · 2002
    Randomized trial70 participantsImmunity forSelenium
  36. Depressed immune response to tetanus in children with vitamin A deficiency.
    Semba RD; Muhilal; Scott AL; Natadisastra G; Wirasasmita S; Mele L; Ridwan E; West KP; Sommer A · The Journal of nutrition · 1992
    Randomized trial236 participantsImmunity forVitamin A
  37. Impact of a single megadose of vitamin A at delivery on breastmilk of mothers and morbidity of their infants.
    Roy SK; Islam A; Molla A; Akramuzzaman SM; Jahan F; Fuchs G · European journal of clinical nutrition · 1997
    Randomized trial50 participantsImmunity forVitamin A
  38. Vitamin A supplementation reduces measles morbidity in young African children: a randomized, placebo-controlled, double-blind trial.
    Coutsoudis A; Broughton M; Coovadia HM · The American journal of clinical nutrition · 1991
    Randomized trial60 participantsImmunity forVitamin A
  39. Vitamin A supplementation enhances specific IgG antibody levels and total lymphocyte numbers while improving morbidity in measles.
    Coutsoudis A; Kiepiela P; Coovadia HM; Broughton M · The Pediatric infectious disease journal · 1992
    Randomized trial60 participantsImmunity forVitamin A
  40. Vitamin A supplementation reduces the monocyte chemoattractant protein-1 intestinal immune response of Mexican children.
    Long KZ; Santos JI; Estrada Garcia T; Haas M; Firestone M; Bhagwat J; Dupont HL; Hertzmark E; Rosado JL; Nanthakumar NN · The Journal of nutrition · 2006
    Randomized trial127 participantsImmunity forVitamin A
  41. Nutrient supplementation for prevention of viral respiratory tract infections in healthy subjects: A systematic review and meta-analysis.
    Vlieg-Boerstra B; de Jong N; Meyer R; Agostoni C; De Cosmi V; Grimshaw K; Milani GP; Muraro A; Oude Elberink H; Pali-Schöll I; Roduit C; Sasaki M; Skypala I; Sokolowska M; van Splunter M; Untersmayr E; Venter C; O'Mahony L; Nwaru BI · Allergy · 2022
    Meta-analysis199,055 participants115 studies pooledImmunity forZinc
  42. Zinc supplementation reduces the incidence of acute lower respiratory infections in infants and preschool children: a double-blind, controlled trial.
    Sazawal S; Black RE; Jalla S; Mazumdar S; Sinha A; Bhan MK · Pediatrics · 1998
    Randomized trial609 participantsImmunity forZinc
  43. A randomized controlled trial of zinc supplementation in the treatment of acute respiratory tract infection in Thai children.
    Rerksuppaphol S; Rerksuppaphol L · Pediatric reports · 2020
    Randomized trial64 participantsImmunity forZinc
  44. The effect of zinc and vitamin A supplementation on immune response in an older population.
    Fortes C; Forastiere F; Agabiti N; Fano V; Pacifici R; Virgili F; Piras G; Guidi L; Bartoloni C; Tricerri A; Zuccaro P; Ebrahim S; Perucci CA · Journal of the American Geriatrics Society · 1998
    Randomized trial136 participantsImmunity forZinc
  45. The role of specific nutrients in preventing immune system and blood cell disorders: an umbrella review.
    Vecchietti A; Strano P; Minutolo G; Grieco V; Cappuccio G; Granvillano G; Confalonieri L; Briganti GL; Raso E; Chimienti M; Pellegrini M; Mercogliano M; Spatari G; Lugli C; Urbano T; Lorenzon A · Journal of preventive medicine and hygiene · 2026
    Systematic review13 studies pooledImmunity forZinc
  46. Efficacy and Tolerability of Topical 0.1% Stabilized Bioactive Retinol for Photoaging: A Vehicle-Controlled Integrated Analysis.
    Farris P; Berson D; Bhatia N; Goldberg D; Lain E; Mariwalla K; Zeichner J; Miller D; McGuire T; Kizoulis M · Journal of drugs in dermatology : JDD · 2024
    Meta-analysis471 participants6 studies pooledSkin Health forVitamin A
  47. Tensile properties and contours of aging facial skin. A controlled double-blind comparative study of the effects of retinol, melibiose-lactose and their association.
    Piérard-Franchimont C; Castelli D; Cromphaut IV; Bertin C; Ries G; Cauwenbergh G; Piérard GE · Skin research and technology : official journal of International Society for Bioengineering and the Skin (ISBS) [and] International Society for Digital Imaging of Skin (ISDIS) [and] International Society for Skin Imaging (ISSI) · 2016
    Randomized trial120 participantsSkin Health forVitamin A
  48. Antiaging action of retinol: from molecular to clinical.
    Bellemère G; Stamatas GN; Bruère V; Bertin C; Issachar N; Oddos T · Skin pharmacology and physiology · 2009
    Randomized trial48 participantsSkin Health forVitamin A
  49. An Updated Review of Topical Tretinoin in Dermatology: From Acne and Photoaging to Skin Cancer.
    Balado-Simó P; Morgado-Carrasco D; Gómez-Armayones S; López-Ferrer A; Barco D; Ferrándiz-Pulido C; Podlipnik S · Journal of clinical medicine · 2025
    Narrative reviewSkin Health forVitamin A
  50. Novel Cyclized Hexapeptide-9 Outperforms Retinol Against Skin Aging: A Randomized, Double-Blinded, Active- and Vehicle-Controlled Clinical Trial.
    Chang H; Tao K; Yang Y; Wang Y; Ge M; Wang X; Tang S; Yu H · Journal of cosmetic dermatology · 2025
    Randomized trialSkin Health forVitamin A
  51. Sex-related differences in response to zinc pyrithione shampoo vs. non-anti-dandruff shampoo.
    Collins LZ; Baines FL; Matheson JR; Turner GA; Diao Y; Li Y; Pi Y · International journal of cosmetic science · 2019
    Meta-analysis2,088 participants20 studies pooledSkin Health forZinc
  52. Maintenance of an Acidic Skin Surface with a Novel Zinc Lactobionate Emollient Preparation Improves Skin Barrier Function in Patients with Atopic Dermatitis.
    Andrew PV; Pinnock A; Poyner A; Brown K; Chittock J; Kay LJ; Cork MJ; Danby SG · Dermatology and therapy · 2024
    Cohort study23 participantsSkin Health forZinc
  53. Spatial expression of metallothionein, matrix metalloproteinase-1 and Ki-67 in human epidermal wounds treated with zinc and determined by quantitative immunohistochemistry: A randomised double-blind trial.
    Ågren MS; Chafranska L; Eriksen JO; Forman JL; Bjerrum MJ; Schjerling P; Larsen HF; Cottarelli E; Jorgensen LN; Gjerdrum LMR · European journal of cell biology · 2021
    Randomized trial30 participantsSkin Health forZinc
  54. A pilot trial using topical regular crystalline insulin vs. aqueous zinc solution for uncomplicated cutaneous wound healing: Impact on quality of life.
    Attia EA; Belal DM; El Samahy MH; El Hamamsy MH · Wound repair and regeneration : official publication of the Wound Healing Society [and] the European Tissue Repair Society · 2014
    Randomized trial90 participantsSkin Health forZinc
  55. Evidence-Based Nutritional Interventions in Wound Care.
    Saeg F; Orazi R; Bowers GM; Janis JE · Plastic and reconstructive surgery · 2021
    Systematic review2,339 participants36 studies pooledSkin Health forZinc
  56. Environmental exposure to metals and male reproductive hormones: circulating testosterone is inversely associated with blood molybdenum.
    Meeker JD; Rossano MG; Protas B; Padmanahban V; Diamond MP; Puscheck E; Daly D; Paneth N; Wirth JJ · Fertility and sterility · 2010
    Cross-sectional study219 participantsTestosterone Support forZinc
  57. Nonpharmacological Interventions for the Management of Testosterone and Sperm Parameters: A Scoping Review.
    Santos HO; Cadegiani FA; Forbes SC · Clinical therapeutics · 2022
    Scoping reviewTestosterone Support forZinc
  58. Zinc is an Essential Element for Male Fertility: A Review of Zn Roles in Men's Health, Germination, Sperm Quality, and Fertilization.
    Fallah A; Mohammad-Hasani A; Colagar AH · Journal of reproduction & infertility · 2020
    Narrative reviewTestosterone Support forZinc
  59. Clinical, endocrinological and biochemical effects of zinc deficiency.
    Prasad AS · Clinics in endocrinology and metabolism · 1986
    Narrative reviewTestosterone Support forZinc
  60. Clinical, endocrinologic, and biochemical effects of zinc deficiency.
    Prasad AS · Special topics in endocrinology and metabolism · 1986
    Narrative reviewTestosterone Support forZinc
  61. What did we learn in 35 years of research on nutrition and supplements for age-related macular degeneration: a systematic review.
    Pameijer EM; Heus P; Damen JAA; Spijker R; Hooft L; Ringens PJ; Imhof SM; van Leeuwen R · Acta ophthalmologica · 2023
    Systematic review27 studies pooledVision Support forCopper
  62. Dietary Nutrient Intake and Progression to Late Age-Related Macular Degeneration in the Age-Related Eye Disease Studies 1 and 2.
    Agrón E; Mares J; Clemons TE; Swaroop A; Chew EY; Keenan TDL; AREDS and AREDS2 Research Groups · Ophthalmology · 2021
    Cohort study8,242 participantsVision Support forCopper
  63. Association between late age-related macular degeneration and dietary intake of copper, iron, zinc and selenium: a 2005-2008 NHANES cross-sectional observational study.
    Lu Y; Li C; Liu Y; Wu T; Lu P · BMC ophthalmology · 2025
    Observational study4,996 participantsVision Support forCopper
  64. Associations between dietary nutrient intake and the risk of multiple age-related ocular diseases: evidence from longitudinal analysis.
    Yang Y; Zou H · The journal of nutrition, health & aging · 2026
    Cohort study103,192 participantsVision Support forCopper
  65. Dietary habits and dietary nutrient intake in patients with age-related macular degeneration: A case-control study.
    Šalková Kráľová J; Kolář P; Kapounová Z; Veselý P; Derflerová Brázdová Z · Central European journal of public health · 2023
    Case-control study151 participantsVision Support forCopper
  66. Efficacy and safety of AZR-MD-001 selenium sulfide ophthalmic ointment in adults with meibomian gland dysfunction: A vehicle-controlled, randomized clinical trial.
    Watson SL; Jones LW; Stapleton F; Hinds M; Ng A; Tan J; Alster Y; Bosworth C; Rafaeli O; DePuy V; CELESTIAL STUDY Group · The ocular surface · 2026
    Randomized trial245 participantsVision Support forSelenium
  67. Efficacy and safety of AZR-MD-001 selenium sulfide ophthalmic ointment in adults with meibomian gland dysfunction over six months of treatment: A Phase 2, vehicle-controlled, randomized extension trial.
    Downie LE; Craig JP; Stapleton F; Tan J; Jones LW; Ng A; Hinds M; Bosworth C; Alster Y · The ocular surface · 2025
    Randomized trial245 participantsVision Support forSelenium
  68. AZR-MD-001 0.5% selenium sulfide ophthalmic ointment for the treatment of contact lens discomfort: A vehicle-controlled, randomized, clinical trial.
    Stapleton F; Hinds M; Tan J; Jones L; Chalmers R; Bosworth C; Alster Y · The ocular surface · 2025
    Randomized trial67 participantsVision Support forSelenium
  69. The effect of a biweekly novel selenium sulfide-containing topical treatment in symptomatic contact lens wearers: An exploratory study.
    Stapleton F; Jia T; DePuy V; Bosworth C; Gleeson M; Tan J · The ocular surface · 2025
    Randomized trial14 participantsVision Support forSelenium
  70. A randomized trial of vitamin A and vitamin E supplementation for retinitis pigmentosa.
    Berson EL; Rosner B; Sandberg MA; Hayes KC; Nicholson BW; Weigel-DiFranco C; Willett W · Archives of ophthalmology (Chicago, Ill. : 1960) · 1993
    Randomized trial601 participantsVision Support forVitamin A
  71. Efficacy and safety of retinol palmitate ophthalmic solution in the treatment of dry eye: a Japanese Phase II clinical trial.
    Toshida H; Funaki T; Ono K; Tabuchi N; Watanabe S; Seki T; Otake H; Kato T; Ebihara N; Murakami A · Drug design, development and therapy · 2018
    Randomized trial66 participantsVision Support forVitamin A
  72. Vitamin A supplementation for preventing morbidity and mortality in children from six months to five years of age.
    Imdad A; Mayo-Wilson E; Haykal MR; Regan A; Sidhu J; Smith A; Bhutta ZA · The Cochrane database of systematic reviews · 2022
    Meta-analysis1,223,856 participants47 studies pooledVision Support forVitamin A
  73. Vitamin A supplementation improves retinal function in infants at risk of retinopathy of prematurity.
    Mactier H; McCulloch DL; Hamilton R; Galloway P; Bradnam MS; Young D; Lavy T; Farrell L; Weaver LT · The Journal of pediatrics · 2012
    Randomized trial89 participantsVision Support forVitamin A
  74. Effect of short-term, high-dose retinol on dark adaptation in aging and early age-related maculopathy.
    Owsley C; McGwin G; Jackson GR; Heimburger DC; Piyathilake CJ; Klein R; White MF; Kallies K · Investigative ophthalmology & visual science · 2006
    Randomized trial104 participantsVision Support forVitamin A
  75. Antioxidant vitamin and mineral supplements for age-related macular degeneration.
    Evans JR · The Cochrane database of systematic reviews · 2002
    Systematic review170 participants7 studies pooledVision Support forZinc
  76. Antioxidant vitamin and mineral supplements for slowing the progression of age-related macular degeneration.
    Evans JR; Lawrenson JG · The Cochrane database of systematic reviews · 2023
    Meta-analysis3,790 participants5 studies pooledVision Support forZinc
  77. Oral zinc in macular degeneration.
    Newsome DA; Swartz M; Leone NC; Elston RC; Miller E · Archives of ophthalmology (Chicago, Ill. : 1960) · 1988
    Randomized trial151 participantsVision Support forZinc
  78. A randomized, placebo-controlled, clinical trial of high-dose supplementation with vitamins C and E, beta carotene, and zinc for age-related macular degeneration and vision loss: AREDS report no. 8.
    Age-Related Eye Disease Study Research Group · Archives of ophthalmology (Chicago, Ill. : 1960) · 2001
    Randomized trial3,640 participantsVision Support forZinc
  79. Effect of vitamin A and zinc supplementation on the nutriture of children in Northeast Thailand.
    Udomkesmalee E; Dhanamitta S; Sirisinha S; Charoenkiatkul S; Tuntipopipat S; Banjong O; Rojroongwasinkul N; Kramer TR; Smith JC · The American journal of clinical nutrition · 1992
    Randomized trial133 participantsVision Support forZinc