$27.74 $0.27 per serving
Product analysis
Ester-C Plus 1000 mg Vitamin C supports normal immune function and collagen formation, particularly when vitamin C intake is low. It offers good value for the vitamin C supplied.
AI assessment of the formula, label and price. How scoring works
Nutrient Quality37
The vitamin C and calcium sources are named, but their ingredient quality cannot be confidently compared. The unspecified flavonoid mixture adds a separate uncertainty about the formula.
Ingredient Transparency88
All ingredient amounts are stated, making serving comparisons easier. The flavonoid mixture is less clearly described because its form is unspecified.
Value For Money74
The vitamin C offers good value for its form and amount. Calcium and the flavonoid mixture lack reliable separate cost comparisons.
Customer Satisfaction84
Customer feedback is very positive. Several hundred reviews provide a useful picture of satisfaction.
Product Focus74
The clearest roles are normal immune support and collagen formation, with modest evidence for shorter colds during regular use. Wider inflammation and eye benefits are more conditional and do not follow from the named vitamin C form alone.
- Format
Capsule - Container
- 100 Capsule(s)
- Per serving
- $0.27
- Also available
Ester-C Plus 1000 mg Vitamin C$14.24- Customer rating
- 4.9 · 780 ratings
Goals
Impact
High effect
Vitamin C · 1000 mg
Calcium can help fill a dietary gap important for maintaining bones. Vitamin C provides a nutritional contribution rather than evidence of extra protection from illness at high intake. Higher amounts do not establish extra benefit once intake is adequate.
How this product is rated for Everyday Health
Ingredient fit80
The known ingredients have a broader relationship to the retained nutritional functions. Amounts meet the comparison references.
Goal fit
Relevant nutrients sit within a broader formulation, reducing its focus on the retained general-health functions.
Dose adequacy
The retained amounts meet the saved comparison references; higher amounts do not establish extra benefit above nutritional adequacy.
Pathways54
The strongest retained connection is antioxidant and immune defence. Coverage of other functions is narrower.
Depth
The strongest retained connection is antioxidant and immune defence, based on the known ingredient amounts.
Breadth
The contribution is concentrated in antioxidant and immune defence, with limited coverage of other retained functions.
Evidence74
Vitamin C provides the strongest retained evidence. The supplied context supports nutritional availability or limited population-specific findings, without establishing broad health improvements beyond adequate intake.
Evidence strength
Vitamin C supplies the strongest retained evidence. Its supplied context limits expectations to nutritional or population-specific outcomes.
Studied preparation
The retained preparations match the saved criteria; no superiority of chemical form or delivery is established.
Formulation logic100
The supplied checks identify no configured conflict or missing required partner. The retained amount thresholds remain comparison references rather than treatment doses.
Partner coverage
The retained ingredients have no missing required partner under the saved criteria; this does not establish an added combination benefit.
Conflicts
No configured ingredient conflict was identified from the supplied amounts.
Effective doses
The retained amounts meet the saved minimum comparison threshold, which is not proof of a clinical effective dose.
Impact
High effect
Vitamin C · 1000 mg
Vitamin C supports normal collagen formation and wound healing when intake is low. The 1000 mg per serving reaches the saved amount plateau, but extra vitamin C has no established skin benefit once needs are met. Oral vitamin C alone has not shown improved UV redness in the supplied evidence. The declared form does not establish a separate cosmetic benefit.
How this product is rated for Skin Health
Ingredient fit73
Vitamin C provides a focused nutritional connection to skin. Vitamin C reaches the saved amount plateau; a larger serving does not establish greater cosmetic benefit.
Goal fit
Vitamin C provides a focused nutritional connection to skin.
Dose adequacy
Vitamin C reaches the saved amount plateau; a larger serving does not establish greater cosmetic benefit.
Pathways0
The saved findings recognize nutrient sufficiency without assigning a targeted skin-pathway contribution.
Depth
No targeted collagen, hydration, barrier or UV contribution was assigned.
Breadth
No targeted skin aspect meets the saved coverage criterion.
Evidence100
Vitamin C leads the saved evidence finding through its established nutritional role. The declared nutrient preparation is accepted without a separate cosmetic advantage for its form.
Evidence strength
Vitamin C leads the saved evidence finding through its established nutritional role.
Studied preparation
The declared nutrient preparation is accepted without a separate cosmetic advantage for its form.
Formulation logic100
No missing required partner or specified conflict was identified. All counted ingredients meet the saved minimum amount criterion; this does not establish visible skin improvement.
Partner coverage
The counted ingredients have no missing required partner; this does not establish an added combination benefit.
Conflicts
No specified ingredient conflict was identified in the supplied facts.
Effective doses
All counted ingredients meet the saved minimum amount criterion; this does not establish visible skin improvement.
Impact
Highest effect
Vitamin C · 1000 mg
Vitamin C has modest support for shortening colds with regular supplementation, without establishing infection prevention or treating an existing cold. The declared serving receives the full saved amount allowance, which does not establish an optimal dose or verified daily use. Accompanying vitamin C sources and bioflavonoids do not establish additional vitamin C or extra benefit.
How this product is rated for Immunity
Ingredient fit80
Vitamin C receives the main ingredient allowances. The declared amount reaches the full comparison range.
Goal fit
Vitamin C supplies the main saved ingredient focus; other actives and the product’s wider purposes affect specificity.
Dose adequacy
The declared amount meets the full saved comparison allowance; more does not establish greater benefit.
Pathways60
The strongest saved contribution concerns innate immune cell activity. Coverage is narrower across the remaining immune functions.
Depth
The strongest saved contribution concerns innate immune cell activity.
Breadth
The saved findings identify meaningful coverage of innate immune cell activity.
Evidence100
The strongest relevant support concerns normal nutrient function or regular vitamin C use, rather than general infection prevention.
Evidence strength
The strongest relevant support concerns normal nutrient function or regular vitamin C use, rather than general infection prevention.
Studied preparation
The relevant preparations receive the saved comparison allowance, without establishing clinical superiority over alternative forms.
Formulation logic100
The counted ingredients meet the minimum amount criterion and have no missing required partner or identified configured conflict.
Partner coverage
No required partner is missing for the ingredients counted in the saved findings.
Conflicts
No configured ingredient conflict was identified; this does not establish individual suitability.
Effective doses
The ingredients counted here meet the saved minimum amount criterion; this comparison threshold does not prove clinical effectiveness.
Impact
High effect
Vitamin C · 1000 mg
Vitamin C supports antioxidant defenses. Its inflammatory-marker benefit was limited to people with elevated baseline CRP in an otherwise null trial; this does not establish broad anti-inflammatory benefit.
How this product is rated for Inflammation
Ingredient fit73
Vitamin C supplies the main relevant ingredients. Rutin remains unresolved and is not counted.
Goal fit
Vitamin C supplies the relevant focus, with other actives broadening the formula.
Dose adequacy
The declared 1000 mg vitamin C serving matches the reviewed amount comparison, without establishing a daily regimen.
Pathways55
Vitamin C contribute mainly to oxidative and mitochondrial stress in the saved findings. Other evaluated pathways receive no meaningful coverage.
Depth
Vitamin C contribute mainly through the oxidative-stress pathway in the saved findings.
Breadth
Oxidative and mitochondrial stress is the only pathway reaching the saved coverage threshold.
Evidence87
Vitamin C is the main evidence contributor in the saved findings. The clinical signal is limited to elevated baseline CRP, and special vitamin C forms do not establish extra benefit.
Evidence strength
Vitamin C leads the saved evidence finding; its relevant CRP signal depends on elevated baseline inflammation.
Studied preparation
The saved finding recognizes the counted nutrient preparation, without establishing an advantage for branded or buffered forms.
Formulation logic100
Vitamin C can contribute without an additional partner, and no configured conflict was found. The counted amounts pass the saved inclusion threshold.
Partner coverage
Vitamin C do not require an additional partner for the contribution recorded here.
Conflicts
No configured ingredient conflict was found among the evaluated ingredients.
Effective doses
All ingredients counted in this finding pass its amount threshold; that threshold does not prove clinical effectiveness.
Impact
High effect
Vitamin C · 1000 mg
Vitamin C provides an antioxidant role, but the supplied AREDS evidence concerns a defined combination in selected people with AMD. It does not establish vitamin C alone as a way to improve everyday vision. Ester-C does not receive a demonstrated visual-performance advantage here. Rutin remains unresolved between the source label and imported inventory, rather than being confirmed absent.
How this product is rated for Eye Health
Ingredient fit73
Vitamin C is the sole credited ingredient, with a declared amount.
Goal fit
Vitamin C is the sole credited ingredient, with a declared amount.
Dose adequacy
Vitamin C reaches the upper amount range; this is not a validated standalone dose for better vision.
Pathways47
Coverage is concentrated in antioxidant support for the retina and lens; other tracked areas remain limited or uncovered.
Depth
Retinal and lens antioxidant support receives the strongest assigned coverage, without demonstrating improved vision.
Breadth
Only retinal and lens antioxidant support reaches the coverage threshold.
Evidence68
Vitamin C receives the assigned evidence weight, but its relevant clinical evidence concerns selected AMD combinations rather than standalone visual improvement.
Evidence strength
Vitamin C receives the assigned evidence weight, but its relevant clinical evidence concerns selected AMD combinations rather than standalone visual improvement.
Studied preparation
The credited preparations are recognized in the saved findings; this does not establish a complete clinical regimen or universal form equivalence.
Formulation logic100
Credited ingredients have no missing required partner, and no configured ingredient conflict was identified.
Partner coverage
Every credited ingredient works independently or has its required partner in the saved finding.
Conflicts
No configured ingredient conflict was identified.
Effective doses
Every credited ingredient meets the comparison's amount threshold; this is not proof of a clinically effective vision dose.
Ingredients
| Ingredient | Amount per serving | Score |
|---|---|---|
Vitamin C (Ester-C) | 1000 mg | |
Calcium (Ester-C Calcium Ascorbate) | 108 mg | |
Citrus Bioflavonoids Complex | 200 mg |
Vitamin C (Ester-C) · 1000 mg OverallScore89
The serving provides 1,000 mg of vitamin C under the Ester-C name, but the chemical source is not resolved in the saved facts. A non-acidic, stomach-friendly claim is recorded.
How this ingredient is rated
Active Ingredient Quality & Bioavailability90
An Ester-C claim is recorded, but the chemical source is not resolved in the saved facts.
Vitamin C Chemical Form & Delivery System
An Ester-C claim is recorded, but the chemical source is not resolved in the saved facts.
Gastric Comfort & pH Balance
Non-acidic and stomach-friendly claims are recorded; they do not establish a measured pH.
Dose, Safety & Label Transparency83
The serving provides 1,000 mg of vitamin C.
Optimal Dosage Targeting
The serving provides 1,000 mg of vitamin C.
Purity & Excipient Quality
Standard excipients are recorded in the evaluation; their specific identities are not established in the saved facts.
Mineral & Source Transparency
The vitamin C amount is recorded, but its chemical source remains unknown.
Value100
The whole-product price is assessed relative to the vitamin C amount.
Price per Gram of Vitamin C
The saved whole-product price corresponds to about $0.28 per gram of vitamin C.
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Sources
Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.
- Dietary intake and blood concentrations of antioxidants and the risk of cardiovascular disease, total cancer, and all-cause mortality: a systematic review and dose-response meta-analysis of prospective studies.
- Scientific Opinion on the substantiation of a health claim related to vitamin C and increasing non haem iron absorption pursuant to Article 14 of Regulation (EC) No 1924/2006.
- Vitamin C Depletion and All-Cause Mortality in Renal Transplant Recipients.
- Associations of Serum Biomarkers of Fruit and Vegetable Intake With the Risk of Cause-Specific Mortality and All-Cause Mortality: A National Prospective Cohort Study.
- Relation between plasma ascorbic acid and mortality in men and women in EPIC-Norfolk prospective study: a prospective population study. European Prospective Investigation into Cancer and Nutrition.
- Role of Oral Vitamin 'C' on Astigmatic Errors in Phacoemulsification.
- Ascorbic acid metabolites are involved in intraocular pressure control in the general population.
- Nutritional modulation of cataract.
- Dietary n-3 Fatty Acid, α-Tocopherol, Zinc, vitamin D, vitamin C, and β-carotene are Associated with Age-Related Macular Degeneration in Japan.
- Adherence to a Mediterranean diet, lifestyle and age-related macular degeneration: the Coimbra Eye Study - report 3.
- Vitamin C and contribution to the normal function of the immune system: evaluation of a health claim pursuant to Article 14 of Regulation (EC) No 1924/2006.
- Therapeutic effects of high-dose vitamin C supplementation in patients with COVID-19: a meta-analysis.
- Effect of micronutrient supplements on influenza and other respiratory tract infections among adults: a systematic review and meta-analysis.
- New evidence for antioxidant properties of vitamin C.
- Enhanced Vitamin C Delivery: A Systematic Literature Review Assessing the Efficacy and Safety of Alternative Supplement Forms in Healthy Adults.
- Efficacy of Vitamin C as Glucocorticoid Substitute for Reducing Pain and Inflammation After Total Hip Arthroplasty: A Randomized Controlled Trial.
- The Impact of Vitamin C on Analgesic, Anti-inflammatory, and Hemostatic Outcomes After Total Hip and Knee Arthroplasty: A Systematic Review and Meta-Analysis.
- The impact of vitamin C supplementation on the perioperative outcomes after total hip and knee arthroplasty: a systematic review and meta-analysis.
- Therapeutic Impact of Ascorbic Acid on Oral and Periodontal Tissues: A Systematic Literature Review.
- Oral vitamin C administration reduces early recurrence rates after electrical cardioversion of persistent atrial fibrillation and attenuates associated inflammation.