$24.99 $0.03 per serving
Product analysis
D3 1000 IU offers vitamin D to help fill low intake and support normal bone, muscle and immune function. Its main value is meeting nutritional needs, with additional benefits less certain when vitamin D status is already adequate.
AI assessment of the formula, label and price. How scoring works
Nutrient Quality100
Vitamin D is supplied as D3, a favorable form for nutritional use. That form choice alone does not establish better health outcomes than D2.
Ingredient Transparency100
The vitamin D amount and form are clearly disclosed. You can check the serving and identify the source without uncertainty over an undisclosed blend.
Value For Money80
The vitamin D amount is favorably priced. A simple formula keeps the cost comparison tied closely to the nutrient you are buying.
Customer Satisfaction82
Customer ratings are very positive across a moderate review pool. The feedback supports satisfaction without establishing additional health benefits.
Product Focus66
The single nutrient keeps the formula simple despite its connection to several health goals. Its clearest role is correcting low intake, while broad energy, hormone and aging benefits are uncertain.
- Format
Softgel - Container
- 650 Softgel(s)
- Per serving
- $0.03
- Also available
D3 2000 IU$13.97- Customer rating
- 4.9 · 601 ratings
Goals
Impact
High effect
Vitamin D · 1000 IU
Vitamin D adds a nutrient contribution that can help fill low dietary intake. Its amount per serving exceeds the ordinary nutritional comparison in the supplied context, without establishing additional general-health or disease-prevention benefits. The D3 form does not establish superior outcomes in this assessment.
How this product is rated for Everyday Health
Ingredient fit72
The formula is concentrated on an included ingredient, although it is linked to other goals.
Goal fit
The formula is concentrated on an included ingredient, although it is linked to other goals.
Dose adequacy
The included amounts partly meet the saved references; an unresolved amount cannot establish a dose contribution.
Pathways19
The strongest represented mechanism is bone and mineral metabolism. This describes ingredient roles rather than demonstrated health improvement.
Depth
The strongest represented mechanism is bone and mineral metabolism. This describes ingredient roles rather than demonstrated health improvement.
Breadth
No mechanism reaches the saved coverage threshold.
Evidence82
Vitamin D supplies the strongest included evidence contribution; preparation and population limitations still apply.
Evidence strength
Vitamin D supplies the strongest included evidence contribution; preparation and population limitations still apply.
Studied preparation
The included preparations match the saved references, without transferring nutrient availability into broader health benefits.
Formulation logic100
No matching ingredient conflict was identified in the supplied findings.
Partner coverage
The included contributors can act independently or have their required partner; this does not establish combination synergy.
Conflicts
No matching ingredient conflict was identified in the supplied findings.
Effective doses
All included contributors meet the saved minimum amount threshold, which is not a proven minimum effective dose.
Impact
High effect
Vitamin D · 1000 IU
Vitamin D contributes to normal immune function and can help fill a nutritional gap. The 25 mcg selected softgel serving contributes partly to the saved amount comparison, without establishing additional infection prevention. Its D3 form does not establish clinical superiority over D2. The supplied respiratory-infection findings do not support treating nutritional availability as proven prevention.
How this product is rated for Immunity
Ingredient fit72
The relevant ingredient selection fits the immune goal, although the product is also associated with other uses.
Goal fit
The relevant ingredient selection fits the immune goal, although the product is also associated with other uses.
Dose adequacy
The relevant amounts contribute partly to the saved comparisons, with unresolved quantities contributing less.
Pathways40
The strongest represented area is immune-cell function and regulation. The saved findings are concentrated in one immune function, giving limited breadth.
Depth
The strongest represented area is immune-cell function and regulation.
Breadth
The saved findings are concentrated in one immune function, giving limited breadth.
Evidence100
Vitamin D leads the saved evidence finding, primarily reflecting nutritional roles rather than proven added infection prevention.
Evidence strength
Vitamin D leads the saved evidence finding, primarily reflecting nutritional roles rather than proven added infection prevention.
Studied preparation
The counted preparations match the saved preparation finding; this does not establish superior benefit from particular forms or delivery.
Formulation logic100
The counted ingredients have their relevant partners or contribute independently, and no listed formulation conflict was triggered.
Partner coverage
The counted ingredients can contribute independently or have their relevant partners; an extra combined benefit is not established.
Conflicts
No listed formulation conflict was triggered; this does not establish safety of the whole product.
Effective doses
The counted ingredients reach the saved minimum amount comparison, which is not a proven clinical benefit threshold.
Impact
Moderate effect
Vitamin D · 1000 IU
Vitamin D supports nutritional needs relevant to muscle and bone function, especially when intake or status is low. The 25 mcg serving can help fill a dietary gap, without evidence of additional anti-aging benefit in people whose needs are already met.
How this product is rated for Longevity
Ingredient fit72
The saved findings consider 1 relevant ingredients without unrelated active ingredients.
Goal fit
The counted active ingredients all relate to the goal; links to other goals also affect the saved focus finding.
Dose adequacy
The saved dose finding considers the declared amounts of 1 ingredients against their individual references.
Pathways0
The saved findings assign no contribution to the specific aging-related mechanisms assessed.
Depth
No assessed mechanism receives a saved contribution.
Breadth
No assessed area reaches the saved coverage threshold.
Evidence83
Vitamin D leads the saved evidence finding. The supplied references limit what can be inferred about aging outcomes.
Evidence strength
Vitamin D supplies the strongest saved evidence finding among ingredients meeting the minimum amount reference.
Studied preparation
The saved assessment marks the preparations of 1 ingredients meeting its amount reference as matching its evidence requirements.
Formulation logic100
The saved checks account for required partners and record no matched conflict.
Partner coverage
Each counted ingredient can contribute independently under the saved assessment or has its required partner.
Conflicts
No configured ingredient conflict is recorded.
Effective doses
1 of 1 counted ingredients meet the saved minimum amount threshold.
Impact
High effect
Vitamin D · 1000 IU
Vitamin D is involved in inflammatory signalling, but supplementation has produced inconsistent changes in inflammatory markers. A transient reduction in CRP in older adults did not persist at later follow-up, and other markers were unchanged. This D3 serving receives amount-based recognition, without establishing a broad clinical anti-inflammatory benefit.
How this product is rated for Inflammation
Ingredient fit72
Vitamin D is the relevant ingredient, with a declared amount for comparison.
Goal fit
The relevant ingredient declarations form a focused comparison for this goal, although clinical applicability remains limited.
Dose adequacy
Declared amounts only partly match the supplied comparisons; unresolved active quantities cannot establish adequacy.
Pathways19
Inflammatory gene signalling is the strongest assigned route; that assignment does not establish a clinical anti-inflammatory effect.
Depth
Inflammatory gene signalling is the strongest assigned route; that assignment does not establish a clinical anti-inflammatory effect.
Breadth
No assigned route reaches the supplied coverage criterion.
Evidence93
Vitamin D leads the saved evidence finding, but inflammatory-marker results are inconsistent.
Evidence strength
Vitamin D leads the saved evidence finding, but inflammatory-marker results are inconsistent.
Studied preparation
The supplied comparison accepts the relevant preparations; this does not establish equivalence of every formulation or a matching daily regimen.
Formulation logic100
No listed conflict or missing required partner is identified. Amount comparisons do not demonstrate an added benefit from combining ingredients.
Partner coverage
No required partner is missing among the recognized ingredients; this does not establish synergy.
Conflicts
No listed conflict is triggered by the supplied ingredient and amount facts.
Effective doses
All recognized ingredients meet the minimum amount comparison, which is not a proven biological threshold.
Impact
Moderate effect
Vitamin D · 1000 IU
Vitamin D isn't known to raise testosterone reliably when you're already getting enough. Its connection to hormone levels depends on nutritional and personal circumstances, and results from initially deficient overweight men don't translate directly to everyone. The serving amount alone doesn't tell you whether it will change your testosterone.
How this product is rated for Testosterone Support
Ingredient fit72
Vitamin D isn't known to raise testosterone reliably in people who already get enough.
Goal fit
Vitamin D isn't known to raise testosterone reliably in people who already get enough.
Dose adequacy
Vitamin D provides 25 mcg per serving; that amount alone doesn't show how much testosterone will change.
Pathways0
Vitamin D's proposed hormonal role does not confirm a lasting increase in circulating testosterone.
Depth
Vitamin D's proposed hormonal role does not confirm a lasting increase in circulating testosterone.
Breadth
Ingredient mechanisms alone do not confirm a broader hormonal benefit.
Evidence81
Vitamin D isn't known to raise testosterone reliably in people who already get enough.
Evidence strength
Vitamin D isn't known to raise testosterone reliably in people who already get enough.
Studied preparation
The vitamin d declaration is identifiable, without proving that this serving raises testosterone.
Formulation logic100
Vitamin D does not depend on a companion ingredient here. No particular ingredient conflict is identified.
Partner coverage
Vitamin D does not require another listed ingredient for its potential role here.
Conflicts
No particular conflict among the listed ingredients is identified.
Effective doses
Vitamin D provides 25 mcg per serving; that amount alone doesn't show how much testosterone will change.
Impact
High effect
Vitamin D · 1000 IU
Vitamin D has been studied for fatigue in adults with vitamin D deficiency. That study used a single large treatment dose, so it does not establish routine energy benefit from this serving in adults with adequate status. The saved result recognizes the declared amount, but it records no coverage of the specific energy pathways.
How this product is rated for Energy
Ingredient fit72
Vitamin D anchors the recognized ingredient fit, with declared amounts partly meeting the saved comparisons.
Goal fit
Vitamin D is central to the product’s recognized energy connection, although the product is also linked to other goals.
Dose adequacy
The declared amounts partly meet the saved comparisons, limiting the size of the recognized contribution.
Pathways0
The saved result identifies no coverage of its specific energy pathways. Nutritional fatigue support remains distinct from alertness or exercise capacity.
Depth
No specific energy pathway receives coverage, even though the saved result recognizes nutritional contributions.
Breadth
No energy pathway reaches the saved breadth threshold.
Evidence95
Vitamin D leads the recognized evidence, but the supplied context limits how broadly its findings apply.
Evidence strength
Vitamin D supplies the strongest recognized evidence here, subject to the population and application limits described for it.
Studied preparation
The saved findings accept the qualifying preparations; this does not establish form superiority.
Formulation logic100
No required partner is missing, and no configured sedative conflict is present. The recognized amounts reach the saved minimum comparison.
Partner coverage
The recognized ingredients have no missing required partner for their assigned contributions.
Conflicts
No configured sedative conflict applies: valerian, kava, qualifying tryptophan and melatonin are absent.
Effective doses
All recognized ingredients reach the saved minimum amount comparison; that threshold is not proof of a clinical energy effect.
Impact
Moderate effect
Vitamin D · 1000 IU
Vitamin D3 at 25 mcg supports normal muscle and bone function. Fitness benefits are most relevant when low vitamin D contributes to weakness; supplementation does not consistently improve performance in people whose needs are already met.
How this product is rated for Fitness
Ingredient fit72
The relevant ingredient is closely focused on the assessed fitness role. The assessed amounts provide partial exposure matches.
Goal fit
The relevant ingredient is closely focused on the assessed fitness role.
Dose adequacy
The assessed amounts provide partial exposure matches.
Pathways0
The saved contribution concerns nutritional sufficiency without coverage of a specific performance pathway. No assessed pathway reaches the saved substantial-coverage threshold.
Depth
The saved contribution concerns nutritional sufficiency without coverage of a specific performance pathway.
Breadth
No assessed pathway reaches the saved substantial-coverage threshold.
Evidence69
Vitamin D provides the strongest assessed evidence at an eligible amount. The supplied population and exercise-context limits still apply. The included preparations match those recognized in the saved findings.
Evidence strength
Vitamin D provides the strongest assessed evidence at an eligible amount. The supplied population and exercise-context limits still apply.
Studied preparation
The included preparations match those recognized in the saved findings.
Formulation logic100
The assessed ingredients work alone or have their required partner. No configured ingredient conflict was identified. 1 of 1 assessed ingredients meet the saved minimum exposure threshold. That threshold does not guarantee better performance.
Partner coverage
The assessed ingredients work alone or have their required partner.
Conflicts
No configured ingredient conflict was identified.
Effective doses
1 of 1 assessed ingredients meet the saved minimum exposure threshold. That threshold does not guarantee better performance.
Ingredients
| Ingredient | Amount per serving | Score |
|---|---|---|
Vitamin D3 (Cholecalciferol) | 1000 IU |
Vitamin D (Cholecalciferol) · 1000 IU OverallScore88
Each serving provides 1,000 IU of vitamin D3. The evaluation also records a qualifying third-party certification claim.
How this ingredient is rated
Active Ingredient Quality & Bioavailability87
The vitamin D is D3 (cholecalciferol). Its raw material origin is not established in the saved facts.
Vitamin D3 vs. D2 Superiority
Cholecalciferol is vitamin D3, a form evaluated favorably for raising and maintaining vitamin D levels.
Sourcing and Active Marker Disclosure
The saved facts identify vitamin D3, but do not establish its raw material source.
Dose, Safety & Label Transparency94
Each serving provides 1,000 IU of vitamin D3. A qualifying third-party certification claim is recorded.
Daily Dosage Appropriateness
One serving provides 1,000 IU of vitamin D3.
Excipient and Additive Purity
The saved ingredients identify none of the checked additive categories; the sugar amount is not established.
Purity and Quality Certification
The evaluation records a qualifying third-party certification claim, but the specific seal is not named in the saved facts.
Value80
The estimated cost is about $0.04 per 1,000 IU of vitamin D, based on the whole-product price.
Price per 1,000 IU Efficiency
The whole-product price works out to about $0.04 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.