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Vitamin D-3 2000 IU

Source Naturals Wellness
4.8
★ ★ ★ ★ ★
(84 ratings)
Vitamin D 2000 IU
Product Image
Score86
A focused 2,000 IU D3 softgel offers good dosing and value for maintenance. Transparency beyond the active ingredient is modest.
How scoring works
Quantity:200 Softgel(s) • (200 servings)
Goals:
General Health
Immunity
Testosterone Support
Anti-Aging
Anti-Inflammatory Support
Energy

Score 86

A focused 2,000 IU D3 softgel offers good dosing and value for maintenance. Transparency beyond the active ingredient is modest.
How scoring works
$10.50($0.05 per serving)
iHerb
$ 11.39
Pure Formulas
$ 10.50
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Analysis

The formula supplies 2,000 IU of cholecalciferol, using the preferred D3 form. Softgel delivery provides a sensible environment for absorption of this fat-soluble vitamin.

The amount fits routine maintenance for many adults without entering the high-dose range. Its single-active design makes total intake easier to plan alongside food and other supplements.

A large bottle and low serving cost support long-term use. The supplied information does not identify the D3 raw source, all inactive ingredients, or independent quality verification.

Who is it for
  • Adults seeking routine D3 maintenance
  • People who prefer softgels
  • Value-focused long-term users
Best for
  • Daily 2,000 IU supplementation
  • Simple single-active routines
  • Long-supply purchasing

Pros

  • Uses cholecalciferol
  • Provides a practical maintenance amount
  • Softgel supports absorption
  • Offers favorable cost efficiency

Cons

  • Raw source is not disclosed
  • Complete inactive ingredients are unavailable
  • Independent verification is not identified
  • Does not include broader nutrient cofactors

Warnings

  • Count the 2,000 IU serving together with vitamin D from multivitamins and fortified foods.
  • People with high blood calcium, kidney stones, or granulomatous conditions should seek individualized guidance.
  • Users of thiazide diuretics or digoxin may need closer calcium monitoring when adding vitamin D.

Nutrient quality

92 Highest impact

Cholecalciferol is a well-regarded and absorbable vitamin D form in a lipid-friendly softgel. The vitamin D amount fits common maintenance use.

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Ingredient transparency

85 Highest impact

Every listed active has a specific amount. A complete excipient and carrier list is not available in the supplied data.

.

Customer satisfaction

69 High impact

The average rating is very strong. The modest rating volume limits confidence.

.

Value for money

97 Highest impact

The supply provides excellent value per effective serving. The formula is not inflated by low-value extras.

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Report analysis

Goals

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

Vitamin D3 directly supports immune function, calcium handling, bone health, and normal muscle function. The daily amount sits in a practical range for many adults who need supplemental vitamin D.

Cholecalciferol in a softgel is a well-suited form for this fat-soluble vitamin. The simple formula provides strong depth for one foundational pathway without unnecessary additions.

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 directly supports immune regulation and barrier function at a useful daily amount. The softgel format is well suited to a fat-soluble nutrient.

The single-ingredient design provides strong depth and clear dosing. It does not cover zinc, vitamin C, or botanical pathways, so its immune role is focused rather than comprehensive.

Study evidence
Vitamin D Supportive 85 studies
Testosterone Support
Testosterone Support
Impact
High effect
B Goal FitA Strength of SupportD CoverageA+ Formula Quality
Vitamin D · 2000 IU

Vitamin D3 provides a foundational hormone-related nutrient at a targeted daily amount. The softgel format supports absorption of the fat-soluble vitamin.

Benefits for testosterone are most likely when vitamin D status is low, and a blood test can guide whether this amount is appropriate. The single-nutrient design offers excellent depth for vitamin D but no support for stress, zinc, magnesium, or free hormone pathways.

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

Vitamin D3 provides strong foundational support for bone, muscle, and immune function that matter with age. The preferred cholecalciferol form, useful daily amount, and softgel delivery strengthen practical effectiveness.

Its contribution remains limited to one broad nutritional pathway rather than several biological drivers of aging. A focused formula avoids unnecessary ingredients and is easy to combine with a wider healthy-aging plan.

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

Vitamin D3 provides focused immune modulation that may help maintain a balanced inflammatory response. The amount is well suited to routine daily support rather than an acute anti-inflammatory effect.

Cholecalciferol and the softgel format support good absorption. The single-ingredient design is transparent and deep within one pathway, but it does not address oxidative or enzyme-mediated inflammation.

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

Vitamin D can improve fatigue when low status is a contributing factor, but it is not a direct acute energy enhancer. Human evidence supports correcting vitamin D deficiency to improve related fatigue, while benefit in replete users is less consistent.

The 2000 IU amount supports routine vitamin D maintenance rather than providing a token dose. Cholecalciferol is clearly disclosed in a lipid softgel that suits absorption of this fat-soluble vitamin.

Study evidence
Vitamin D Supportive 32 studies

Ingredients

IngredientAmount per serving
Vitamin D3 (Cholecalciferol)
 2000 IU
Gluten Free Adults 18–50 Dairy Free Sugar Free
Report overview
Vitamin D (Cholecalciferol) · 2000 IU OverallScore80
A Active Ingredient Quality & BioavailabilityC+ Dose, Safety & Label TransparencyB+ Value

Cholecalciferol provides the preferred vitamin D form. Its lipid-based format supports absorption of this fat-soluble vitamin. The 2,000 IU serving fits the preferred daily range, and cost efficiency is favorable for the amount supplied.

View ingredientView products
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88 Performance

D3 2000 IU

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<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>
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Vitamin D-3 2000 IU

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<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>
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Super Strength D3-2000 IU

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<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>
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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>
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Extra Strength Liquid Vitamin D3

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<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

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<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>
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<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. 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
  2. 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
  3. 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
  4. 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
  5. 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
  6. 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
  7. 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
  8. 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
  9. 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
  10. 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
  11. 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
  12. 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
  13. 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
  14. 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
  15. 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
  16. 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
  17. 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
  18. 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
  19. 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
  20. 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
  21. 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
  22. 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
  23. 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
  24. 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
  25. 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
  26. 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
  27. 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
  28. 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
  29. 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
  30. 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