Ester-C with Citrus Bioflavonoids
Goals
$18.89 $0.16 per serving
Product analysis
Ester-C with Citrus Bioflavonoids offers good value for vitamin C, which supports normal immune function and collagen formation when intake falls short.
AI assessment of the formula, label and price. How scoring works
Nutrient Quality37
The vitamin C and calcium forms are identified, but a quality advantage cannot be established confidently. The flavonoid preparation is unspecified.
Ingredient Transparency88
All listed amounts and the main nutrient forms are disclosed. The flavonoid mixture is less clearly described, limiting direct comparisons.
Value For Money74
Value is very favorable for the vitamin C amount. The extra calcium and flavonoids do not have enough information for a reliable value comparison.
Customer Satisfaction96
Customer feedback is very positive across a large number of ratings. That gives a broad picture of satisfaction without confirming health effects.
Product Focus74
Vitamin C is the main nutritional focus, with support for normal immune function and collagen formation. Extra intake and the named delivery form do not establish added benefits once needs are met.
- Format
Tablet - Container
- 225 Tablet(s)
- Per serving
- $0.16
- Also available
Ester-C 500 mg With Citrus Bioflavoinds$9.16- Customer rating
- 4.9 · 17,216 ratings
Goals
Impact
High effect
Vitamin C · 1000 mg
Vitamin C contribute to normal antioxidant and immune functions. These nutritional contributions are useful when intake falls short; extra benefit above adequate intake is not established.
How this product is rated for Everyday Health
Ingredient fit80
Vitamin C supply the main nutritional contributions.
Goal fit
Vitamin C supplies the main relevant contribution. Other actives broaden the formula beyond these roles.
Dose adequacy
The relevant serving amounts reach the saved comparison endpoints; these do not establish extra benefit above adequate intake.
Pathways54
The strongest supported area is antioxidant and immune defence.
Depth
The strongest supported area is antioxidant and immune defence.
Breadth
The broader contribution covers antioxidant and immune defence.
Evidence74
The nutrient findings concern filling dietary gaps, with no established extra benefit when intake is adequate.
Evidence strength
Vitamin C leads the saved comparison; the supported contribution is nutritional availability when intake is low.
Studied preparation
The saved findings accept the relevant preparations; this does not demonstrate superior forms or improved outcomes in adequately nourished adults.
Formulation logic100
The relevant ingredients have no missing required partners or triggered listed conflicts.
Partner coverage
The relevant ingredients can contribute independently or have their required partners; this does not establish an added combination benefit.
Conflicts
No listed ingredient conflict was triggered by the supplied facts.
Effective doses
All ingredients retained in this finding meet its amount threshold; that threshold is not a proven clinical dose.
Impact
Highest effect
Vitamin C · 1000 mg
Vitamin C supports normal immune-cell and antioxidant functions. Regular supplementation has modest support for shortening cold duration, which does not mean preventing infection or treating an established cold. The selected serving contributes vitamin C, but a single serving does not establish the repeated exposure used in regular-use studies, and larger amounts do not prove greater protection.
How this product is rated for Immunity
Ingredient fit80
Relevant ingredients support immune-related roles, while additional actives broaden the formula beyond those contributions.
Goal fit
Relevant ingredients support immune-related roles, while additional actives broaden the formula beyond those contributions.
Dose adequacy
The recognized amount reaches the saved reference; this does not establish an optimal dose, greater protection or safety at higher exposure.
Pathways60
Innate immune-cell activity reaches the saved threshold; barrier and oxidative contributions remain smaller.
Depth
The strongest recognized area is innate immune-cell activity; this describes the saved functional finding rather than observed infection protection.
Breadth
Innate immune-cell activity reaches the saved threshold; barrier and oxidative contributions remain smaller.
Evidence100
Vitamin C drives the strongest saved evidence finding, within the supplied limits on normal immune function and respiratory outcomes.
Evidence strength
Vitamin C drives the strongest saved evidence finding, within the supplied limits on normal immune function and respiratory outcomes.
Studied preparation
The saved result recognizes the preparations meeting its amount threshold; this does not establish superiority of particular nutrient forms.
Formulation logic100
No configured ingredient conflict was triggered; this covers only the evaluated combinations. All recognized ingredients meet the saved minimum amount threshold; this does not establish a clinical response.
Partner coverage
Recognized ingredients work independently or have their required partners; no extra combination benefit is established.
Conflicts
No configured ingredient conflict was triggered; this covers only the evaluated combinations.
Effective doses
All recognized ingredients meet the saved minimum amount threshold; this does not establish a clinical response.
Impact
High effect
Vitamin C · 1000 mg
Vitamin C is needed to build collagen and maintain normal wound healing. Correcting low intake can restore these functions, but extra vitamin C has no established skin benefit when intake is adequate. The supplied evidence does not show added cosmetic or UV-protection benefits from the large serving amount or the named delivery form.
How this product is rated for Skin Health
Ingredient fit73
Relevant ingredients share this formula with actives aimed at other purposes. The relevant amount reaches the recorded exposure comparison; this does not establish added skin benefit.
Goal fit
Relevant ingredients share this formula with actives aimed at other purposes.
Dose adequacy
The relevant amount reaches the recorded exposure comparison; this does not establish added skin benefit.
Pathways0
No direct contribution to the four tracked skin mechanisms was recorded, despite vitamin C’s normal nutritional role.
Depth
No direct contribution to the four tracked skin mechanisms was recorded, despite vitamin C’s normal nutritional role.
Breadth
No tracked skin mechanism reaches the recorded coverage threshold.
Evidence100
Vitamin C’s role in collagen and deficiency-related healing is established; extra cosmetic benefit in adequately nourished adults is not.
Evidence strength
Vitamin C’s role in collagen and deficiency-related healing is established; extra cosmetic benefit in adequately nourished adults is not.
Studied preparation
The recorded preparation comparison is satisfied, but preparation-specific study findings do not automatically transfer to every ingredient or finished product.
Formulation logic100
No required partner was missing and no defined conflict was identified. The relevant amounts meet the recorded minimum comparison; this is not proof of a clinically effective skin dose.
Partner coverage
No required partner was missing in the recorded findings; this does not establish an added combination benefit.
Conflicts
No defined ingredient conflict was identified in the supplied findings.
Effective doses
The relevant amounts meet the recorded minimum comparison; this is not proof of a clinically effective skin dose.
Impact
High effect
Vitamin C · 1000 mg
Vitamin C contributes antioxidant activity, but its inflammation findings depend on baseline context. A large trial was null overall, with a CRP reduction confined to people starting with elevated CRP. That subgroup result does not establish a routine anti-inflammatory effect, and buffered forms do not establish an extra advantage.
How this product is rated for Inflammation
Ingredient fit73
Vitamin C provides the main relevant connection. Known eligible amounts meet the saved comparison range.
Goal fit
Vitamin C supplies the main relevant ingredient connection.
Dose adequacy
The known eligible amounts reach the saved comparison range, which is not proof of clinical effectiveness.
Pathways55
The strongest retained connection concerns oxidative and mitochondrial stress; this identifies a pathway link rather than proven clinical relief.
Depth
The strongest retained connection concerns oxidative and mitochondrial stress; this identifies a pathway link rather than proven clinical relief.
Breadth
One pathway reaches the saved coverage threshold; broader coverage is not established.
Evidence87
Vitamin C provides the strongest retained evidence connection, with limited or inconsistent human outcome findings.
Evidence strength
Vitamin C provides the strongest retained evidence connection, with limited or inconsistent human outcome findings.
Studied preparation
Eligible material meets the saved preparation criteria; this does not establish clinical benefit from the exact product.
Formulation logic100
No unmet required partner or configured conflict was identified. Meeting amount criteria does not establish added benefit from combining ingredients.
Partner coverage
No unmet required partner was identified for the retained ingredients; their combination does not establish extra benefit.
Conflicts
No configured ingredient conflict was identified in the supplied findings.
Effective doses
Eligible ingredients meet the saved amount threshold; this is not proof of an effective treatment dose.
Impact
High effect
Vitamin C · 1000 mg
Vitamin C contributes to antioxidant protection in the retina and lens. Its clinical vision evidence concerns a defined combination for selected people with AMD, rather than improved everyday vision from vitamin C alone.
How this product is rated for Eye Health
Ingredient fit73
The declared nutrients provide the relevant connection to vision. Their known amounts meet the saved reference amounts.
Goal fit
The relevant vision ingredients sit within a broader formulation with ingredients aimed at other goals.
Dose adequacy
The declared relevant amounts meet the saved reference amounts; this does not establish additional benefit at higher amounts.
Pathways47
The strongest ingredient connection is retinal and lens antioxidant defense. Other visual functions have limited coverage.
Depth
The strongest connection is retinal and lens antioxidant defense, based on the relevant declared ingredients.
Breadth
The findings concentrate on retinal and lens antioxidant defense, giving limited breadth across visual functions.
Evidence68
Vitamin C supplies the strongest retained evidence. Nutrient or selected AMD-population findings do not establish general vision improvement.
Evidence strength
Vitamin C provides the strongest retained evidence here; the population and outcome limitations still determine what benefit can be expected.
Studied preparation
The relevant preparations match the saved preparation criteria; this alone does not establish the same outcomes as a trial.
Formulation logic100
The saved partner and conflict checks identify no missing partner or configured conflict. Amount thresholds remain comparison references rather than proven effective doses.
Partner coverage
No required partner is missing under the saved ingredient criteria.
Conflicts
No configured ingredient conflict was identified from the known amounts.
Effective doses
All retained ingredients meet the saved amount threshold, which is a comparison reference rather than a proven effective dose.
Ingredients
| Ingredient | Amount per serving | Score |
|---|---|---|
Vitamin C (Ester-C Calcium Ascorbate) | 1000 mg | |
Calcium (Ester-C Calcium Ascorbate) | 110 mg | |
Citrus Bioflavonoids Complex | 400 mg |
Vitamin C (Ester-C Calcium Ascorbate) · 1000 mg OverallScore92
Each serving supplies 1,000 mg of vitamin C as Ester-C, a buffered calcium ascorbate. The amount and associated calcium are recorded, and the price per gram of vitamin C is low.
How this ingredient is rated
Active Ingredient Quality & Bioavailability90
Ester-C uses buffered calcium ascorbate, and a non-acidic claim is recorded.
Vitamin C Chemical Form & Delivery System
Vitamin C is supplied as Ester-C, a branded calcium ascorbate form.
Gastric Comfort & pH Balance
Calcium ascorbate is a buffered form; the saved facts also record a non-acidic claim.
Dose, Safety & Label Transparency91
The serving provides 1000 mg of vitamin C.
Optimal Dosage Targeting
A serving supplies 1000 mg of vitamin C.
Purity & Excipient Quality
The evaluation identifies standard excipients among the other ingredients.
Mineral & Source Transparency
The vitamin C amount and source are recorded, along with 110 mg of calcium.
Value100
The whole-product price works out to about $0.17 per 1,000 mg of vitamin C.
Price per Gram of Vitamin C
The whole-product price works out to about $0.17 per 1,000 mg 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.