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D3 2000 IU

Nature Made
4.8
★ ★ ★ ★ ★
(10362 ratings)
Vitamin D 2000 IU
Product Image
Score88
Best suited to general health, with the clearest benefits coming from the disclosed active ingredients. Strong value and a large evidence volume support confidence, although complete excipient details are not supplied.
How scoring works
Quantity:260 Softgel(s) • (260 servings)
Goals:
General Health
Immunity
Anti-Aging
Anti-Inflammatory Support
Testosterone Support
Energy
Fitness

Score 88

Best suited to general health, with the clearest benefits coming from the disclosed active ingredients. Strong value and a large evidence volume support confidence, although complete excipient details are not supplied.
How scoring works

Also available as

1 option
1000.00IU • 650 servings D 1000 IU • 650 Softgel(s) • 650 servings $24.99 ($0.03 per serving)
$13.97($0.05 per serving)
Walmart
$ 13.97
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Analysis

A focused D3 softgel combines a practical maintenance amount with an absorption-friendly format. Strong value and a large evidence volume support confidence, although complete excipient details are not supplied.

Vitamin D3 is a foundational nutrient with strong relevance to bone, muscle, immune, and calcium-regulating functions. The softgel format supports absorption, while independent verification adds confidence in identity and potency. The disclosed amount is well suited to routine maintenance for many adults.

Vitamin D3 can support muscle function and recovery when vitamin D status is low. The 2,000 IU softgel uses an absorption-friendly format and carries useful potency verification. Vitamin D is not a direct performance enhancer for athletes who already have adequate status.

Who is it for
  • People seeking general health support
  • People seeking immunity support
  • People seeking anti-aging support
Best for
  • General Health
  • Immunity
  • Anti-Aging

Pros

  • A focused D3 softgel combines a practical maintenance amount with an absorption-friendly format.
  • Vitamin D3 is a foundational nutrient with strong relevance to bone, muscle, immune, and calcium-regulating functions.
  • The softgel format supports absorption, while independent verification adds confidence in identity and potency.
  • The disclosed amount is well suited to routine maintenance for many adults.
  • Vitamin D3 supports bone integrity, muscle function, and immune regulation, which are foundational to healthy aging.

Cons

  • Strong value and a large evidence volume support confidence, although complete excipient details are not supplied.
  • Raw-source and full excipient details are not provided, but the focused formula has no major active-design weakness.
  • It does not directly inhibit the major inflammatory enzymes highlighted for this goal.
  • The dose is useful, but the formula offers no antioxidant or omega-3 pathway coverage.
  • It does not address zinc status, stress regulation, or free-hormone availability.

Warnings

  • Individual need is best judged with vitamin D blood testing.

Nutrient quality

97 Highest impact

Cholecalciferol in a softgel is a well-absorbed form and suitable delivery format. The vitamin D3 amount is meaningful for routine supplemental use.

.

Ingredient transparency

85 Highest impact

The single active ingredient has a specific amount. A complete oil carrier and inactive ingredient list was not supplied.

.

Customer satisfaction

72 High impact

The available aggregate rating is strong for this category. No firsthand outcome details were supplied, so alignment with the intended use is uncertain.

.

Value for money

96 Highest impact

The preferred D3 form and softgel delivery provide strong quality for the serving cost. The product is highly competitive among focused vitamin D softgels.

.
Report analysis

Goals

General Health
General Health
Impact
Highest effect
A Goal FitA Strength of SupportC- CoverageA+ Formula Quality
Vitamin D · 2000 IU

Vitamin D3 is a foundational nutrient with strong relevance to bone, muscle, immune, and calcium-regulating functions. The softgel format supports absorption, while independent verification adds confidence in identity and potency.

The disclosed amount is well suited to routine maintenance for many adults. Raw-source and full excipient details are not provided, but the focused formula has no major active-design weakness.

Study evidence
Vitamin D Supportive 115 studies
Immunity
Immunity
Impact
Highest effect
A Goal FitA Strength of SupportC- CoverageA+ Formula Quality
Vitamin D · 2000 IU

Vitamin D3 is a foundational nutrient with strong relevance to bone, muscle, immune, and calcium-regulating functions. The softgel format supports absorption, while independent verification adds confidence in identity and potency.

The disclosed amount is well suited to routine maintenance for many adults. Raw-source and full excipient details are not provided, but the focused formula has no major active-design weakness.

Study evidence
Vitamin D Supportive 85 studies
Anti-Aging
Anti-Aging
Impact
High effect
B- Goal FitA Strength of SupportC- CoverageA Formula Quality
Vitamin D · 2000 IU

Vitamin D3 supports bone integrity, muscle function, and immune regulation, which are foundational to healthy aging. Its value is greatest when correcting or preventing inadequate vitamin D status rather than acting as a broad longevity intervention.

The cholecalciferol form and exact amount are clearly disclosed in a focused formula. No meaningful product-specific warning is supported by the supplied dose and formula.

Study evidence
Vitamin D Supportive 50 studies
Anti-Inflammatory Support
Anti-Inflammatory Support
Impact
High effect
B- Goal FitA Strength of SupportD+ CoverageA+ Formula Quality
Vitamin D · 2000 IU

Vitamin D3 provides focused immune-modulating support with the clearest value for people with low vitamin D status. It does not directly inhibit the major inflammatory enzymes highlighted for this goal.

The dose is useful, but the formula offers no antioxidant or omega-3 pathway coverage. Individual need is best judged with vitamin D blood testing.

Study evidence
Vitamin D Supportive 101 studies
Testosterone Support
Testosterone Support
Impact
High effect
B- Goal FitA Strength of SupportD CoverageA+ Formula Quality
Vitamin D · 2000 IU

Vitamin D3 may support testosterone when vitamin D status is low, although human trials are mixed. The amount reaches a meaningful daily range in a softgel suited to absorption.

The focused formula has strong depth in one foundational pathway. It does not address zinc status, stress regulation, or free-hormone availability.

Study evidence
Vitamin D Supportive 56 studies
Energy
Energy
Impact
High effect
B- Goal FitB+ Strength of SupportD- CoverageA+ Formula Quality
Vitamin D · 2000 IU

Vitamin D3 may support energy, muscle function, and mood when low vitamin D status contributes to fatigue. The softgel supplies a practical maintenance amount in an absorption-friendly format.

It does not provide immediate alertness or broad metabolic support. People with adequate vitamin D status should not expect a stimulant-like energy effect.

Study evidence
Vitamin D Supportive 32 studies
Fitness
Fitness
Impact
High effect
C Goal FitA Strength of SupportD- CoverageA Formula Quality
Vitamin D · 2000 IU

Vitamin D3 can support muscle function and recovery when vitamin D status is low. The 2,000 IU softgel uses an absorption-friendly format and carries useful potency verification.

Vitamin D is not a direct performance enhancer for athletes who already have adequate status. The single-nutrient formula does not support ATP production, nitric oxide, hydration, or muscle repair directly.

Study evidence
Vitamin D Disputed 163 studies

Ingredients

IngredientAmount per serving
Vitamin D3 (Cholecalciferol)
 2000 IU
Gluten Free Adults 18–50
Report overview
Vitamin D (Cholecalciferol) · 2000 IU OverallScore90
A Active Ingredient Quality & BioavailabilityA Dose, Safety & Label TransparencyB+ Value

D3 at an effective amount is delivered in an absorption-friendly softgel. USP verification strengthens confidence in identity and potency, though the raw source and complete excipient details are not disclosed. Cost efficiency is good for a focused daily vitamin D option.

View ingredientView products
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86 Performance

Vitamin D-3 2000 IU

Source Naturals Wellness
<p>A focused formula supplies 2000 IU of cholecalciferol without unrelated active ingredients. Compared with the original, the simple, clearly quantified vitamin D3 profile is easier to assess and closely matches the original’s listed vitamin D amount.</p>
85 Performance

Vitamin D-3 2000 IU

Source Naturals
<p>A focused formula supplies 2000 IU of cholecalciferol without unrelated active ingredients. Compared with the original, the simple, clearly quantified vitamin D3 profile is easier to assess and closely matches the original’s listed vitamin D amount.</p>
85 Performance

Super Strength D3-2000 IU

Nature's Bounty
<p>A focused formula supplies 2000 IU of cholecalciferol without unrelated active ingredients. Compared with the original, the simple, clearly quantified vitamin D3 profile is easier to assess and closely matches the original’s listed vitamin D amount.</p>
88 Budget

Liquid Vitamin D3 Drops 2000 IU Natural Citrus Flavor

Bluebonnet
<p>A liquid formula supplies 2000 IU of lanolin-derived vitamin D3 without unrelated active ingredients. It costs less per serving than the original and closely matches the original’s listed vitamin D amount.</p>
88 Budget

Extra Strength Liquid Vitamin D3

Protocol For Life Balance
<p>A liquid formula supplies 2000 IU of lanolin-derived vitamin D3 without unrelated active ingredients. It costs less per serving than the original and closely matches the original’s listed vitamin D amount.</p>
87 Budget

D3 1000 IU

Nature Made
<p>A focused formula supplies 1000 IU of cholecalciferol without unrelated active ingredients. It costs less per serving than the original and uses a lower vitamin D amount that may suit routine maintenance better, but may not match a documented high-dose need.</p>
88 Value

Liquid Vitamin D3 Drops 1000 IU Natural Citrus Flavor

Bluebonnet
<p>A liquid formula supplies 1000 IU of lanolin-derived vitamin D3 without unrelated active ingredients. The lower serving cost and focused ingredient list improve value, while the dose uses a lower vitamin D amount that may suit routine maintenance better, but may not match a documented high-dose need.</p>
87 Value

Vitamin D-3 1000 IU

NOW
<p>A focused formula supplies 1000 IU of lanolin-derived vitamin D3 without unrelated active ingredients. Its focused formula and dose alignment support practical value, although it does not undercut the original’s serving cost and uses a lower vitamin D amount that may suit routine maintenance better, but may not match a documented high-dose need.</p>
85 Value

D3 Supplement 1000 IU

Spring Valley
<p>A focused formula supplies 1000 IU of cholecalciferol without unrelated active ingredients. The lower serving cost and focused ingredient list improve value, while the dose uses a lower vitamin D amount that may suit routine maintenance better, but may not match a documented high-dose need.</p>
Report alternatives

Sources

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

  1. Vitamin D and risk of cause specific death: systematic review and meta-analysis of observational cohort and randomised intervention studies.
    Chowdhury R; Kunutsor S; Vitezova A; Oliver-Williams C; Chowdhury S; Kiefte-de-Jong JC; Khan H; Baena CP; Prabhakaran D; Hoshen MB; Feldman BS; Pan A; Johnson L; Crowe F; Hu FB; Franco OH · BMJ (Clinical research ed.) · 2014
    Meta-analysis95 studies pooledGeneral Health forVitamin D
  2. Vitamin D supplementation for prevention of mortality in adults.
    Bjelakovic G; Gluud LL; Nikolova D; Whitfield K; Wetterslev J; Simonetti RG; Bjelakovic M; Gluud C · The Cochrane database of systematic reviews · 2014
    Meta-analysis95,286 participants159 studies pooledGeneral Health forVitamin D
  3. The effects of vitamin D on all-cause mortality in different diseases: an evidence-map and umbrella review of 116 randomized controlled trials.
    Cao M; He C; Gong M; Wu S; He J · Frontiers in nutrition · 2023
    Meta-analysis149,865 participants116 studies pooledGeneral Health forVitamin D
  4. Vitamin D Status and Mortality: A Systematic Review of Observational Studies.
    Heath AK; Kim IY; Hodge AM; English DR; Muller DC · International journal of environmental research and public health · 2019
    Systematic review84 studies pooledGeneral Health forVitamin D
  5. Current opinion on the role of vitamin D supplementation in respiratory infections and asthma/COPD exacerbations: A need to establish publication guidelines for overcoming the unpublished data.
    Anitua E; Tierno R; Alkhraisat MH · Clinical nutrition (Edinburgh, Scotland) · 2022
    Meta-analysis50,554 participants65 studies pooledImmunity forVitamin D
  6. Association Between Vitamin D and Influenza: Meta-Analysis and Systematic Review of Randomized Controlled Trials.
    Zhu Z; Zhu X; Gu L; Zhan Y; Chen L; Li X · Frontiers in nutrition · 2022
    Meta-analysis4,859 participants10 studies pooledImmunity forVitamin D
  7. Vitamin D supplementation and hospitalization for infection in older adults: A post-hoc analysis of data from the Australian D-Health Trial.
    Pham H; Waterhouse M; Baxter C; Romero BD; McLeod DS; Armstrong BK; Ebeling PR; English DR; Hartel G; O'Connell RL; van der Pols JC; Venn AJ; Webb PM; Whiteman DC; Neale RE · The American journal of clinical nutrition · 2023
    Randomized trial21,315 participantsImmunity forVitamin D
  8. Effect of vitamin D status and vitamin D supplementation on immune function and prevention of acute respiratory tract infections in dark-skinned individuals: a systematic review and meta-analysis.
    Bournot AR; Darling AL; Givens ID; Lovegrove JA; Lanham-New SA; Hart KH · Public health nutrition · 2024
    Meta-analysis36,707 participants18 studies pooledImmunity forVitamin D
  9. Effect of moderate or high versus low dose daily vitamin D on COVID-19 incidence: A double-blind, parallel-group randomized clinical trial.
    Meltzer DO; Moy JN; Schram AW; Tate A; Hyman MJ; Cursio JF; Vokes T; Yeo KJ; Prochaska M; Jacobs JJ; Solway J · Clinical nutrition (Edinburgh, Scotland) · 2026
    Randomized trial955 participantsImmunity forVitamin D
  10. Effect of Calcifediol on Physical Performance and Muscle Strength Parameters: A Systematic Review and Meta-Analysis.
    Barbagallo M; Veronese N; Di Prazza A; Pollicino F; Carruba L; La Carrubba A; Dominguez LJ · Nutrients · 2022
    Meta-analysis5,446 participants7 studies pooledFitness forVitamin D
  11. Vitamin D supplementation and its influence on muscle strength and mobility in community-dwelling older persons: a systematic review and meta-analysis.
    Rosendahl-Riise H; Spielau U; Ranhoff AH; Gudbrandsen OA; Dierkes J · Journal of human nutrition and dietetics : the official journal of the British Dietetic Association · 2018
    Meta-analysis2,866 participants15 studies pooledFitness forVitamin D
  12. Vitamin D and Muscle Health: A Systematic Review and Meta-analysis of Randomized Placebo-Controlled Trials.
    Bislev LS; Grove-Laugesen D; Rejnmark L · Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research · 2021
    Meta-analysis8,747 participants54 studies pooledFitness forVitamin D
  13. Monthly High-Dose Vitamin D Treatment for the Prevention of Functional Decline: A Randomized Clinical Trial.
    Bischoff-Ferrari HA; Dawson-Hughes B; Orav EJ; Staehelin HB; Meyer OW; Theiler R; Dick W; Willett WC; Egli A · JAMA internal medicine · 2016
    Randomized trial200 participantsFitness forVitamin D
  14. Serum 25-Hydroxyvitamin D Levels as an Aging Marker: Strong Associations With Age and All-Cause Mortality Independent From Telomere Length, Epigenetic Age Acceleration, and 8-Isoprostane Levels.
    Schöttker B; Hagen L; Zhang Y; Gào X; Holleczek B; Gao X; Brenner H · The journals of gerontology. Series A, Biological sciences and medical sciences · 2019
    Cohort study9,940 participantsAnti-Aging forVitamin D
  15. Joint association of serum 25-hydroxyvitamin D concentration and body mass index on the acceleration of clinical biomarker-based biological aging.
    Pan Z; Zeng J; Chen Z; Chen S; Yang J; Li H; Wang S; Wang J; Li N; Gong Y; Liu M; Li C · The journals of gerontology. Series A, Biological sciences and medical sciences · 2026
    Cohort study389,217 participantsAnti-Aging forVitamin D
  16. No Causal Association between 25-Hydroxyvitamin D and Features of Skin Aging: Evidence from a Bidirectional Mendelian Randomization Study.
    Noordam R; Hamer MA; Pardo LM; van der Nat T; Kiefte-de Jong JC; Kayser M; Slagboom PE; Uitterlinden A; Zillikens MC; Beekman M; Nijsten T; van Heemst D; Gunn DA · The Journal of investigative dermatology · 2017
    Meta-analysis4,492 participants2 studies pooledAnti-Aging forVitamin D
  17. A Systematic Review and Meta-Analysis of The Effect of Low Vitamin D on Cognition.
    Goodwill AM; Szoeke C · Journal of the American Geriatrics Society · 2017
    Meta-analysis29 studies pooledAnti-Aging forVitamin D
  18. Individual and additive effects of vitamin D, omega-3 and exercise on DNA methylation clocks of biological aging in older adults from the DO-HEALTH trial.
    Bischoff-Ferrari HA; Gängler S; Wieczorek M; Belsky DW; Ryan J; Kressig RW; Stähelin HB; Theiler R; Dawson-Hughes B; Rizzoli R; Vellas B; Rouch L; Guyonnet S; Egli A; Orav EJ; Willett W; Horvath S · Nature aging · 2025
    Randomized trial777 participantsAnti-Aging forVitamin D
  19. Sex-specific associations of serum 25-hydroxyvitamin D concentrations with incident sarcopenia in older adults: A 2-year follow-up study.
    Song S; Lim JY; Kim M; Won CW; Park HY · The journal of nutrition, health & aging · 2025
    Cohort study1,292 participantsAnti-Aging forVitamin D
  20. Vitamin D deficit is associated with accelerated brain aging in the general population.
    Terock J; Bonk S; Frenzel S; Wittfeld K; Garvert L; Hosten N; Nauck M; Völzke H; Van der Auwera S; Grabe HJ · Psychiatry research. Neuroimaging · 2022
    Cross-sectional study1,865 participantsAnti-Aging forVitamin D
  21. Vitamin D intake is associated with dementia risk in the Washington Heights-Inwood Columbia Aging Project (WHICAP).
    Zhao C; Tsapanou A; Manly J; Schupf N; Brickman AM; Gu Y · Alzheimer's & dementia : the journal of the Alzheimer's Association · 2021
    Cohort study1,759 participantsAnti-Aging forVitamin D
  22. Vitamin D deficiency and C-reactive protein: a bidirectional Mendelian randomization study.
    Zhou A; Hyppönen E · International journal of epidemiology · 2023
    Observational study294,970 participantsAnti-Inflammatory Support forVitamin D
  23. Vitamin D in Children With Inflammatory Bowel Disease: A Randomized Controlled Clinical Trial.
    El Amrousy D; El Ashry H; Hodeib H; Hassan S · Journal of clinical gastroenterology · 2021
    Randomized trial120 participantsAnti-Inflammatory Support forVitamin D
  24. Vitamin D supplementation reduces infection rate and promotes wound healing in patients with diabetic foot ulcers.
    Gao YQ; Gao YH; Xing JH · World journal of diabetes · 2025
    Randomized trial120 participantsAnti-Inflammatory Support forVitamin D
  25. Associations of C-reactive Protein with 25-hydroxyvitamin D in 24 Specific Diseases: A Cross-sectional Study from NHANES.
    Yang F; Sun M; Sun C; Li J; Yang X; Bi C; Wang M; Pu L; Wang J; Wang C; Xie M; Yao Y; Jin L · Scientific reports · 2020
    Cross-sectional study9,809 participantsAnti-Inflammatory Support forVitamin D
  26. Combined effects of vitamin D deficiency and systemic inflammation on all-cause mortality and cause-specific mortality in older adults.
    Zhang C; Cui J; Li S; Shen J; Luo X; Yao Y; Shi H · BMC geriatrics · 2024
    Cohort study3,072 participantsAnti-Inflammatory Support forVitamin D
  27. Effect of Vitamin D Supplementation on Fatigue in Multiple Sclerosis: A Systematic Review and Meta-Analysis.
    López-Muñoz P; Torres-Costoso AI; Fernández-Rodríguez R; Guzmán-Pavón MJ; de Arenas-Arroyo SN; Basco-López JÁ; Reina-Gutiérrez S · Nutrients · 2023
    Meta-analysis345 participants5 studies pooledEnergy forVitamin D
  28. Vitamin D Supplementation in Adolescents and Young Adults With Juvenile Systemic Lupus Erythematosus for Improvement in Disease Activity and Fatigue Scores: A Randomized, Double-Blind, Placebo-Controlled Trial.
    Lima GL; Paupitz J; Aikawa NE; Takayama L; Bonfa E; Pereira RM · Arthritis care & research · 2016
    Randomized trial40 participantsEnergy forVitamin D
  29. Vitamin D in Myalgic Encephalomyelitis/Chronic Fatigue Syndrome After COVID-19 or Vaccination: A Randomized Controlled Trial.
    Kodama S; Nakata M; Konishi N; Yoshino M; Fujisawa A; Naganuma M; Kobayashi Y; Hirai Y; Kitagawa A; Miyokawa M; Mishima R; Teramukai S; Fukushima M · Nutrients · 2026
    Randomized trial91 participantsEnergy forVitamin D
  30. The effects of vitamin D supplementation on disease activity and fatigue in Libyan rheumatoid arthritis patients.
    Elfituri S · Reumatologia · 2024
    Randomized trial68 participantsEnergy forVitamin D
  31. The effect of home-based aerobic training and vitamin D supplementation on fatigue and quality of life in patients with multiple sclerosis during COVID-19 outbreak.
    Bahmani E; Hoseini R; Amiri E · Science & sports · 2022
    Randomized trial40 participantsEnergy forVitamin D
  32. Effects of vitamin D supplementation on upper and lower body muscle strength levels in healthy individuals. A systematic review with meta-analysis.
    Tomlinson PB; Joseph C; Angioi M · Journal of science and medicine in sport · 2016
    Meta-analysis310 participants7 studies pooledFitness forVitamin D
  33. Influence of Sunlight and Oral D3 Supplementation on Serum 25(OH)D Concentration and Exercise Performance in Elite Soccer Players.
    Michalczyk MM; Gołaś A; Maszczyk A; Kaczka P; Zając A · Nutrients · 2021
    Randomized trial33 participantsFitness forVitamin D
  34. Effects of Vitamin D Supplementation in Elite Athletes: A Systematic Review.
    Wyatt PB; Reiter CR; Satalich JR; O'Neill CN; Edge C; Cyrus JW; O'Connell RS; Vap AR · Orthopaedic journal of sports medicine · 2024
    Systematic review482 participants14 studies pooledFitness forVitamin D
  35. Association between serum vitamin D levels and cardiorespiratory fitness in the adult population of the USA.
    Marawan A; Kurbanova N; Qayyum R · European journal of preventive cardiology · 2020
    Cross-sectional study1,995 participantsFitness forVitamin D
  36. Effect of vitamin D on gastrointestinal symptoms and health-related quality of life in irritable bowel syndrome patients: a randomized double-blind clinical trial.
    Abbasnezhad A; Amani R; Hajiani E; Alavinejad P; Cheraghian B; Ghadiri A · Neurogastroenterology and motility · 2018
    Randomized trial90 participantsGeneral Health forVitamin D
  37. The impact of vitamin D administration on mortality in COVID-19 patients: a systematic review and meta-analysis of randomized controlled trials.
    Kow CS; Ramachandram DS; Hasan SS; Wong Z; Thiruchelvam K · Inflammopharmacology · 2024
    Meta-analysis2,495 participants19 studies pooledGeneral Health forVitamin D
  38. Meta-analysis of long-term vitamin D supplementation on overall mortality.
    Zheng Y; Zhu J; Zhou M; Cui L; Yao W; Liu Y · PloS one · 2014
    Meta-analysis42 studies pooledGeneral Health forVitamin D
  39. Vitamin D supplementation to prevent acute respiratory infections: individual participant data meta-analysis.
    Martineau AR; Jolliffe DA; Greenberg L; Aloia JF; Bergman P; Dubnov-Raz G; Esposito S; Ganmaa D; Ginde AA; Goodall EC; Grant CC; Janssens W; Jensen ME; Kerley CP; Laaksi I; Manaseki-Holland S; Mauger D; Murdoch DR; Neale R; Rees JR; Simpson S; Stelmach I; Trilok Kumar G; Urashima M; Camargo CA; Griffiths CJ; Hooper RL · Health technology assessment (Winchester, England) · 2020
    Meta-analysis11,321 participants25 studies pooledImmunity forVitamin D
  40. Vitamin D3 and deconvoluting a rash.
    Ernst MK; Evans ST; Techner JM; Rothbaum RM; Christensen LF; Onay UV; Biyashev D; Demczuk MM; Nguyen CV; Honda KS; McCormick TS; Tsoi LC; Gudjonsson JE; Cooper KD; Lu KQ · JCI insight · 2023
    Randomized trial28 participantsImmunity forVitamin D
  41. Effect of vitamin D3 supplementation on cellular immunity and inflammatory markers in COVID-19 patients admitted to the ICU.
    Bychinin MV; Klypa TV; Mandel IA; Yusubalieva GM; Baklaushev VP; Kolyshkina NA; Troitsky AV · Scientific reports · 2022
    Randomized trial110 participantsImmunity forVitamin D
  42. Effect of Two Different Doses of Vitamin D Supplementation on Metabolic Profiles of Insulin-Resistant Patients with Polycystic Ovary Syndrome.
    Jamilian M; Foroozanfard F; Rahmani E; Talebi M; Bahmani F; Asemi Z · Nutrients · 2018
    Randomized trial90 participantsTestosterone Support forVitamin D
  43. Androgens and hirsutism score of overweight women with polycystic ovary syndrome improved after vitamin D treatment: A randomized placebo controlled clinical trial.
    Al-Bayyari N; Al-Domi H; Zayed F; Hailat R; Eaton A · Clinical nutrition (Edinburgh, Scotland) · 2021
    Randomized trial60 participantsTestosterone Support forVitamin D
  44. Association between plasma 25-OH vitamin D and testosterone levels in men.
    Nimptsch K; Platz EA; Willett WC; Giovannucci E · Clinical endocrinology · 2012
    Case-control study1,362 participantsTestosterone Support forVitamin D
  45. Causal Link Between Vitamin D and Total Testosterone in Men: A Mendelian Randomization Analysis.
    Chen C; Zhai H; Cheng J; Weng P; Chen Y; Li Q; Wang C; Xia F; Wang N; Lu Y · The Journal of clinical endocrinology and metabolism · 2020
    Other4,254 participantsTestosterone Support forVitamin D
  46. Associations of vitamin D status and vitamin D-related polymorphisms with sex hormones in older men.
    Rafiq R; van Schoor NM; Sohl E; Zillikens MC; Oosterwerff MM; Schaap L; Lips P; de Jongh RT · The Journal of steroid biochemistry and molecular biology · 2017
    Cohort study643 participantsTestosterone Support forVitamin D