$5.00 $0.05 per serving
Product analysis
C-500 Calcium Ascorbate-C supports normal immune function and collagen formation, particularly when vitamin C intake is low. It is competitively priced 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 the amount supplied. Calcium and the flavonoid mixture lack reliable separate cost comparisons.
Customer Satisfaction94
Customer feedback is very positive. Many thousands of reviews provide a broad picture of buyer satisfaction.
Product Focus65
The clearest purpose is nutritional support for normal immune function and collagen formation. Regular vitamin C has modest support for shorter colds, while wider eye and inflammation benefits are more conditional.
- Format
Capsule - Container
- 100 Capsule(s)
- Per serving
- $0.05
- Also available
C-500 Calcium Ascorbate-C$14.50- Customer rating
- 4.9 · 7,729 ratings
Goals
Impact
Moderate effect
Vitamin C · 500 mg
Vitamin C at 500 mg contributes to normal immune function and antioxidant protection. Its everyday-health role is nutritional support, with benefit depending on how it fits into overall intake. Calcium adds a small mineral contribution at 55 mg.
How this product is rated for Everyday Health
Ingredient fit60
Relevant nutritional or stress-related ingredients sit alongside ingredients aimed at other purposes. The assessed amounts provide partial coverage of the saved comparison references.
Goal fit
Relevant nutritional or stress-related ingredients sit alongside ingredients aimed at other purposes.
Dose adequacy
The assessed amounts provide partial coverage of the saved comparison references.
Pathways17
The strongest assessed connection is to antioxidant and immune defence. The saved findings show limited coverage across the assessed health functions.
Depth
The strongest assessed connection is to antioxidant and immune defence.
Breadth
The saved findings show limited coverage across the assessed health functions.
Evidence74
Vitamin C provides the strongest evidence contribution in the saved assessment. The assessed ingredients match the preparation categories used in the saved review.
Evidence strength
Vitamin C provides the strongest evidence contribution in the saved assessment.
Studied preparation
The assessed ingredients match the preparation categories used in the saved review.
Formulation logic100
The assessed ingredients can contribute individually or have their required companions present. No configured ingredient conflict was identified in the supplied assessment. All ingredients counted in this finding meet the saved minimum amount threshold.
Partner coverage
The assessed ingredients can contribute individually or have their required companions present.
Conflicts
No configured ingredient conflict was identified in the supplied assessment.
Effective doses
All ingredients counted in this finding meet the saved minimum amount threshold.
Impact
High effect
Vitamin C · 500 mg
Vitamin C provides the supported immune contribution, including modest evidence for shorter colds with regular use. Calcium ascorbate does not establish superior outcomes, and the selected serving makes a partial contribution under the saved amount comparison. The accompanying source material is not additional vitamin C, and repeated daily directions are separate from the one-serving findings.
How this product is rated for Immunity
Ingredient fit60
Vitamin C provide the relevant immune contribution. The selected serving supplies a nutritional amount rather than a verified daily regimen.
Goal fit
The meaningful immune connection comes from vitamin c; other product uses do not establish additional immune outcomes.
Dose adequacy
The amount provides partial support under the supplied comparison; this does not mean it lacks nutritional value.
Pathways40
The strongest contribution concerns innate immune-cell activity. One immune area has substantial representation.
Depth
Innate immune-cell activity is the strongest represented area.
Breadth
One immune area has substantial representation.
Evidence100
Vitamin C leads the evidence finding. Regular vitamin C use may modestly shorten colds; prevention and treatment from one serving are not established.
Evidence strength
Regular vitamin C use may modestly shorten colds; prevention and treatment from one serving are not established.
Studied preparation
The included preparations meet the supplied comparison; named forms and delivery methods do not establish superior clinical outcomes.
Formulation logic100
No configured ingredient conflict was identified; that finding is not an overall safety judgment. The included ingredients meet the amount threshold and have no missing required partner.
Partner coverage
The included ingredients work independently or have their required partner; this does not demonstrate extra benefit from combining them.
Conflicts
No configured ingredient conflict was identified; that finding is not an overall safety judgment.
Effective doses
The included ingredients meet the supplied amount threshold; this does not prove clinical effectiveness.
Impact
High effect
Vitamin C · 500 mg
Vitamin C supports collagen formation and helps restore impaired wound healing when intake is low. Extra vitamin C has no established skin benefit when intake is adequate. The calcium ascorbate form does not establish an additional cosmetic benefit.
How this product is rated for Skin Health
Ingredient fit73
The relevant skin ingredients sit within a broader formula serving other purposes. The declared amount reaches the saved amount benchmark; this does not establish additional cosmetic benefit.
Goal fit
The relevant skin ingredients sit within a broader formula serving other purposes.
Dose adequacy
The declared amount reaches the saved amount benchmark; this does not establish additional cosmetic benefit.
Pathways0
The contribution concerns nutritional support rather than demonstrated coverage of collagen structure, hydration, barrier lipids or UV-response outcomes.
Depth
The contribution concerns nutritional support rather than demonstrated coverage of collagen structure, hydration, barrier lipids or UV-response outcomes.
Breadth
No skin outcome pathway reaches the saved coverage threshold.
Evidence100
Vitamin C leads the saved evidence findings; its clearest skin role is correcting low intake, rather than improving already adequate nutrition.
Evidence strength
Vitamin C leads the saved evidence findings; its clearest skin role is correcting low intake, rather than improving already adequate nutrition.
Studied preparation
The saved findings recognize the declared forms; form recognition does not prove extra cosmetic benefit from these nutrients.
Formulation logic100
The credited ingredients have no unmet partner requirement or matched conflict in the saved findings. Their amounts pass the saved minimum inclusion check.
Partner coverage
The credited ingredients are treated as able to contribute independently or as having their required partner.
Conflicts
No configured ingredient conflict was matched in the supplied findings.
Effective doses
The credited ingredient amounts pass the saved minimum inclusion check; this is not a proven effective skin dose.
Impact
Moderate effect
Vitamin C · 500 mg
Vitamin C may help lower CRP, a marker of inflammation, when that marker is already elevated. A general reduction in inflammation isn't clear for adults without that condition. Taking a larger amount doesn't by itself mean you'll notice less pain or other inflammatory symptoms. Its buffered form doesn’t imply a greater anti-inflammatory effect.
How this product is rated for Inflammation
Ingredient fit53
Vitamin C is the relevant ingredient, with benefits depending on the person's starting inflammation.
Goal fit
Vitamin C is the relevant ingredient, with benefits depending on the person's starting inflammation. Calcium, Flavonoid (mixture has no distinct anti-inflammatory benefit identified here.
Dose adequacy
Vitamin C: 500 mg. These are label-serving amounts, not an assumed daily regimen.
Pathways17
The connection concerns oxidative stress, a process involving reactive molecules; it doesn't promise relief from inflammatory symptoms.
Depth
The connection concerns oxidative stress, a process involving reactive molecules; it doesn't promise relief from inflammatory symptoms.
Breadth
The connection is concentrated in oxidative stress rather than spanning several distinct inflammation-related processes.
Evidence87
Vitamin C's possible effect on CRP depends on elevated starting levels. The vitamin C form is identified, but buffered forms have no clear anti-inflammatory advantage.
Evidence strength
Vitamin C's possible effect on CRP depends on elevated starting levels.
Studied preparation
The vitamin C form is identified, but buffered forms have no clear anti-inflammatory advantage.
Formulation logic100
The relevant ingredient can act without an additional partner. No particular ingredient conflict is identified.
Partner coverage
No additional partner ingredient is required for the relevant ingredient’s individual role.
Conflicts
No particular ingredient conflict is identified.
Effective doses
Vitamin C: 500 mg. These are label-serving amounts, not an assumed daily regimen.
Impact
High effect
Vitamin C · 500 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 (Calcium Ascorbate) | 500 mg | |
Calcium (Calcium Ascorbate) | 55 mg | |
Citrus Bioflavonoid Complex | 10 mg |
Vitamin C (Calcium Ascorbate) · 500 mg OverallScore89
A serving provides 500 mg vitamin C as calcium ascorbate, a buffered mineral form. The whole-product price works out to about $0.10 per gram of vitamin C.
How this ingredient is rated
Active Ingredient Quality & Bioavailability83
Vitamin C comes from calcium ascorbate, a buffered mineral form, and the product is described as non-acidic.
Vitamin C Chemical Form & Delivery System
Calcium ascorbate is the named mineral-ascorbate source.
Gastric Comfort & pH Balance
Calcium ascorbate is a buffered mineral form and a non-acidic claim is recorded; measured product pH is not established.
Dose, Safety & Label Transparency91
The serving contains 500 mg vitamin C and its source is identified. The evaluation records the other-ingredient panel.
Optimal Dosage Targeting
The serving provides 500 mg vitamin C.
Purity & Excipient Quality
The evaluation found no flagged additives in the available other-ingredient panel.
Mineral & Source Transparency
The 500 mg vitamin C amount and 55 mg calcium amount are recorded; the calcium need not all come from the ascorbate.
Value100
The whole-product price is about $0.10 per gram of vitamin C.
Price per Gram of Vitamin C
The whole-product price is about $0.10 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.