$13.97 $0.05 per serving
Product analysis
D3 2000 IU offers a simple way to fill low vitamin D intake and support normal bone, muscle and immune functions.
AI assessment of the formula, label and price. How scoring works
Nutrient Quality100
Vitamin D uses the preferred D3 form. The single-ingredient formula makes its source straightforward to identify.
Ingredient Transparency100
The vitamin D amount and form are clearly stated. That makes comparisons with other vitamin D supplements straightforward.
Value For Money80
The serving offers reasonable value for its vitamin D content. The simple formula makes clear which nutrient you are paying for.
Customer Satisfaction93
Customers report very high satisfaction across a large number of ratings. The broad feedback does not establish extra health benefits.
Product Focus77
The single ingredient keeps the formula focused on vitamin D nutrition. Its wider aims are most relevant to low vitamin D rather than predictable improvements for everyone.
- Format
Softgel - Container
- 260 Softgel(s)
- Per serving
- $0.05
- Also available
D3 1000 IU$24.99- Customer rating
- 4.8 · 10,362 ratings
Goals
Impact
Highest effect
Vitamin D · 2000 IU
Vitamin D supports bone and mineral nutrition and can help fill a dietary gap. The selected serving supplies 50 mcg, but its amount does not establish additional benefit above adequate intake. Its immune-related role also does not establish disease prevention or a broad improvement in health for adults who already have enough vitamin D.
How this product is rated for Everyday Health
Ingredient fit92
The assessed ingredients concentrate on nutritional roles relevant to general health. The relevant amounts fully meet the saved comparison amounts; that does not establish extra benefit above nutritional adequacy.
Goal fit
The assessed ingredients concentrate on nutritional roles relevant to general health.
Dose adequacy
The relevant amounts fully meet the saved comparison amounts; that does not establish extra benefit above nutritional adequacy.
Pathways57
The strongest connection is to bone and mineral nutrition, through the relevant nutrients in the selected serving. The broader findings cover bone and mineral nutrition.
Depth
The strongest connection is to bone and mineral nutrition, through the relevant nutrients in the selected serving.
Breadth
The broader findings cover bone and mineral nutrition.
Evidence82
Vitamin D provides the strongest supported contribution at the supplied amount, with usefulness conditional on nutritional need.
Evidence strength
Vitamin D provides the strongest supported contribution at the supplied amount, with usefulness conditional on nutritional need.
Studied preparation
The preparations of the contributing nutrients match those accepted in the supplied findings; this does not establish a superior form or delivery method.
Formulation logic100
All counted nutrients have amounts that meet the saved minimum contribution. The contributing nutrients can act independently or have the relevant partner present; no additional combination benefit is established.
Partner coverage
The contributing nutrients can act independently or have the relevant partner present; no additional combination benefit is established.
Conflicts
No assessed ingredient conflict was identified for the selected serving. This finding does not assess every possible interaction.
Effective doses
All counted nutrients have amounts that meet the saved minimum contribution.
Impact
Highest effect
Vitamin D · 2000 IU
Vitamin D provides a nutrient involved in normal immune regulation. Its value includes filling low intake, but routine supplementation does not establish prevention of respiratory infections. Deficiency correction is a different situation from routine prevention, and the larger amount does not imply greater immune protection.
How this product is rated for Immunity
Ingredient fit92
Vitamin D supplies a focused nutritional contribution.
Goal fit
Vitamin D supplies a focused nutritional contribution.
Dose adequacy
Vitamin D reaches the saved comparison range.
Pathways60
Lymphocyte function and immune regulation receives the strongest saved coverage. Lymphocyte regulation is the main covered area.
Depth
Lymphocyte function and immune regulation receives the strongest saved coverage.
Breadth
Lymphocyte regulation is the main covered area.
Evidence100
Vitamin D anchors the saved evidence finding; the supplied scientific limits determine what immune benefits can be expected.
Evidence strength
Vitamin D anchors the saved evidence finding, without establishing broad infection prevention.
Studied preparation
The counted preparations with substantial known amounts are accepted; no additional form advantage is established.
Formulation logic100
The counted nutrients work independently or have their required partner; no configured conflict was found.
Partner coverage
The counted nutrients work independently or have their required partner.
Conflicts
No configured ingredient conflict was found.
Effective doses
The counted nutrient provides a meaningful amount under the saved criteria.
Impact
Highest effect
Vitamin D · 2000 IU
Vitamin D participates in inflammatory signalling, with mixed biomarker findings rather than established broad clinical benefit. A large trial found no improvement at one year; a later older-adult analysis found a temporary CRP reduction that did not persist. The 50 mcg per serving meets the saved exposure comparison, without establishing greater benefit from larger amounts or a repeated daily regimen.
How this product is rated for Inflammation
Ingredient fit92
Vitamin D is the sole recognized active, with no off-goal ingredient but several linked purposes.
Goal fit
Vitamin D is the sole recognized active, with no off-goal ingredient but several linked purposes.
Dose adequacy
Vitamin D meets the full exposure comparison; larger amounts do not establish greater anti-inflammatory benefit.
Pathways57
Inflammatory gene signalling is the sole represented pathway.
Depth
Inflammatory gene signalling receives the strongest saved coverage.
Breadth
Only inflammatory gene signalling meets the coverage threshold.
Evidence93
Vitamin D supplies the evidence finding and meets the preparation comparison; supplied biomarker outcomes remain mixed.
Evidence strength
Vitamin D leads the evidence comparison, with a transient CRP finding rather than established routine clinical benefit.
Studied preparation
Declared cholecalciferol meets the saved preparation comparison.
Formulation logic100
Recognized ingredients have no missing required partner or listed conflict; their amount findings are described separately.
Partner coverage
No credited ingredient lacks a required partner.
Conflicts
No listed ingredient conflict was found.
Effective doses
Vitamin D reaches the minimum exposure threshold, which is not a proven clinically effective anti-inflammatory dose.
Impact
High effect
Vitamin D · 2000 IU
Vitamin D helps maintain bone and muscle function when deficiency is corrected. Supplementation has not shown the same benefit in adults with adequate levels, and these facts do not establish slower aging.
How this product is rated for Longevity
Ingredient fit92
Vitamin D is the sole relevant ingredient. The declared amount fully meets the saved amount comparison.
Goal fit
Vitamin D is the sole relevant ingredient.
Dose adequacy
The declared amount fully meets the saved amount comparison.
Pathways0
No listed aging pathway received coverage.
Depth
The listed pathways have no coverage from the recognized ingredient.
Breadth
No listed pathway reaches the breadth threshold.
Evidence83
Vitamin D supports deficiency correction, with no extra benefit established in replete adults.
Evidence strength
Vitamin D supports deficiency correction, with no extra benefit established in replete adults.
Studied preparation
The recognized preparation matches the saved criteria; this does not broaden the human outcomes described.
Formulation logic100
Recognized ingredients can stand alone or have their required partners, with no matched conflicts. Their counted amounts meet the saved minimum threshold.
Partner coverage
Recognized ingredients can stand alone or have their required partners; this does not establish added benefit from combining them.
Conflicts
No configured ingredient conflict was matched in the supplied facts.
Effective doses
All ingredients included in this amount check meet its minimum threshold; this is not proof of a clinically effective anti-aging dose.
Impact
High effect
Vitamin D · 2000 IU
Vitamin D may be relevant to testosterone in initially deficient men, including the selected overweight population described in the supplied findings. A healthy-men trial found no total-testosterone effect, so routine supplementation does not establish an increase when vitamin D intake is adequate. The D3 form does not resolve that difference between populations.
How this product is rated for Testosterone Support
Ingredient fit92
The supplied findings center on vitamin D, with its declared amount recognized in the comparison.
Goal fit
The relevant ingredient is the main focus of the supplied ingredient list.
Dose adequacy
The declared amount reaches the saved comparison range; that does not establish an individual hormone response.
Pathways0
The ingredient receives nutritional consideration without coverage of the configured hormone routes.
Depth
No hormone pathway received coverage from this ingredient in the saved findings.
Breadth
No route reaches the saved coverage threshold.
Evidence81
Vitamin D provides the relevant evidence, with different outcomes between initially deficient men and healthy men.
Evidence strength
Vitamin D provides the relevant evidence, with different outcomes between initially deficient men and healthy men.
Studied preparation
The counted ingredient received preparation recognition; this does not establish that this finished product was tested.
Formulation logic100
The counted ingredients meet the saved amount threshold and have no missing required partners or triggered conflicts. These findings do not establish that the finished combination improves testosterone.
Partner coverage
No required partner is missing for the counted ingredients; this does not establish extra benefit from combining ingredients.
Conflicts
No configured ingredient conflict was triggered by the supplied facts; this is not a complete interaction or safety assessment.
Effective doses
The counted ingredient passes the saved amount threshold; this is not proof that this serving improves testosterone.
Impact
High effect
Vitamin D · 2000 IU
Vitamin D can be relevant to fatigue in vitamin-D-deficient adults, but that evidence comes from a selected treatment setting. The supplied D3 serving meets the saved amount comparison without establishing routine energy improvement in people with adequate vitamin D. The treatment trial does not validate this serving as a fatigue regimen.
How this product is rated for Energy
Ingredient fit92
Vitamin D anchors this product’s saved energy connection. The declared amounts reach the saved comparison levels; this does not make them validated fatigue-treatment doses.
Goal fit
Vitamin D is the focused ingredient in the saved energy findings.
Dose adequacy
The declared amounts reach the saved comparison levels; this does not make them validated fatigue-treatment doses.
Pathways0
No direct alertness, exercise-energy or stress-fatigue pathway contribution was recorded. Deficiency-related fatigue can still be nutritionally relevant.
Depth
No direct alertness, exercise-energy or stress-fatigue pathway contribution was recorded.
Breadth
No direct energy area reaches the saved coverage threshold; nutritional relevance and routine energy enhancement remain different questions.
Evidence95
Vitamin D appears in the saved findings, but the supplied population or preparation limits prevent a routine adult energy claim.
Evidence strength
Vitamin D appears in the saved findings, but the supplied population or preparation limits prevent a routine adult energy claim.
Studied preparation
The preparation qualifies in the saved findings, although population and treatment limits still govern how its effects can be described.
Formulation logic100
No missing partner or specified conflict was identified. The included amounts meet the saved minimum comparisons, without establishing a routine energy benefit.
Partner coverage
The included ingredients do not require a missing partner for the roles described.
Conflicts
No specified ingredient conflict was identified in the supplied findings.
Effective doses
The included ingredients meet the saved minimum amount comparisons; these are not proven fatigue-treatment thresholds.
Impact
High effect
Vitamin D · 2000 IU
Vitamin D can help address low intake associated with muscle weakness in severe deficiency. This is distinct from a routine performance boost: benefits in nutrient-replete adults and improved aerobic capacity are not established. The selected serving supplies 50 mcg, a substantial nutrient amount whose retained contribution does not establish greater benefit or suitability. No direct exercise-performance area is represented in the saved pathway findings.
How this product is rated for Fitness
Ingredient fit92
Vitamin D is relevant to weakness associated with severe deficiency, with no established routine performance benefit above nutritional adequacy.
Goal fit
Vitamin D is relevant to weakness associated with severe deficiency, with no established routine performance benefit above nutritional adequacy.
Dose adequacy
The selected serving provides a substantial nutrient amount; it is not an established performance dose or evidence of added benefit above adequacy.
Pathways0
No direct exercise-performance pathway is represented; the retained contribution concerns deficiency-related nutrition.
Depth
No direct exercise-performance pathway is represented; the retained contribution concerns deficiency-related nutrition.
Breadth
None of the evaluated performance areas meets the breadth comparison; this does not remove the deficiency-related nutritional role.
Evidence69
Vitamin D evidence supports addressing severe deficiency-related muscle weakness, with no established performance benefit in replete adults.
Evidence strength
Vitamin D evidence supports addressing severe deficiency-related muscle weakness, with no established performance benefit in replete adults.
Studied preparation
The counted preparations meet the saved preparation finding; this does not establish a superior form or a personal response.
Formulation logic100
The independently counted ingredients meet the amount and partner checks, with no evaluated conflict triggered. These findings do not establish extra benefit from combinations or overall suitability.
Partner coverage
Each independently counted ingredient works alone or has its required partner; no additional combination benefit is established.
Conflicts
No evaluated ingredient combination triggers a conflict finding; this does not establish overall suitability.
Effective doses
All independently counted ingredients meet the saved amount check; smaller present ingredients may remain outside this finding.
Ingredients
| Ingredient | Amount per serving | Score |
|---|---|---|
Vitamin D3 (Cholecalciferol) | 2000 IU |
Vitamin D (Cholecalciferol) · 2000 IU OverallScore91
The recorded serving provides 2,000 IU of vitamin D3 (cholecalciferol). A recognized third-party seal is recorded, though its type is unspecified.
How this ingredient is rated
Active Ingredient Quality & Bioavailability87
The form is vitamin D3 (cholecalciferol). The raw material source is not identified in the saved details.
Vitamin D3 vs. D2 Superiority
Vitamin D3 generally raises and maintains blood vitamin D levels more effectively than D2.
Sourcing and Active Marker Disclosure
The raw material source is not identified in the saved details.
Dose, Safety & Label Transparency100
The recorded serving provides 2,000 IU of vitamin D. A recognized third-party seal is recorded.
Daily Dosage Appropriateness
The recorded serving provides 2,000 IU of vitamin D.
Excipient and Additive Purity
The evaluated ingredient panel did not flag titanium dioxide, artificial colors, or hydrogenated oils.
Purity and Quality Certification
A recognized third-party certification seal is recorded, but its type is not specified in the saved details.
Value80
The whole-product cost is about $0.03 per 1,000 IU of vitamin D.
Price per 1,000 IU Efficiency
The whole-product cost is about $0.03 per 1,000 IU of vitamin D.
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Sources
Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.
- Effect of Vitamin D Supplementation on Fatigue in Multiple Sclerosis: A Systematic Review and Meta-Analysis.
- 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.
- Vitamin D in Myalgic Encephalomyelitis/Chronic Fatigue Syndrome After COVID-19 or Vaccination: A Randomized Controlled Trial.
- The effects of vitamin D supplementation on disease activity and fatigue in Libyan rheumatoid arthritis patients.
- 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.
- Vitamin D supplementation for prevention of mortality in adults.
- Effect of vitamin D on gastrointestinal symptoms and health-related quality of life in irritable bowel syndrome patients: a randomized double-blind clinical trial.
- The impact of vitamin D administration on mortality in COVID-19 patients: a systematic review and meta-analysis of randomized controlled trials.
- Vitamin D Status and Mortality: A Systematic Review of Observational Studies.
- Meta-analysis of long-term vitamin D supplementation on overall mortality.
- Effect of Calcifediol on Physical Performance and Muscle Strength Parameters: A Systematic Review and Meta-Analysis.
- Effects of vitamin D supplementation on upper and lower body muscle strength levels in healthy individuals. A systematic review with meta-analysis.
- Influence of Sunlight and Oral D3 Supplementation on Serum 25(OH)D Concentration and Exercise Performance in Elite Soccer Players.
- Effects of Vitamin D Supplementation in Elite Athletes: A Systematic Review.
- Association between serum vitamin D levels and cardiorespiratory fitness in the adult population of the USA.
- Vitamin D supplementation to prevent acute respiratory infections: individual participant data meta-analysis.
- Association Between Vitamin D and Influenza: Meta-Analysis and Systematic Review of Randomized Controlled Trials.
- Vitamin D3 and deconvoluting a rash.
- Effect of vitamin D3 supplementation on cellular immunity and inflammatory markers in COVID-19 patients admitted to the ICU.
- 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.