ProtoSorb C 500
Goals
$28.00 $0.28 per serving
Product analysis
ProtoSorb C 500 provides vitamin C to support normal immunity and collagen formation. The added blend has undisclosed details, and the vitamin C is relatively costly for the amount supplied.
AI assessment of the formula, label and price. How scoring works
Nutrient Quality33
The quality of the mix remains uncertain, with several added plant ingredients lacking a specified form. The named vitamin C preparation alone does not establish a quality advantage.
Ingredient Transparency63
Ingredient amounts are listed, but several forms are omitted. The proprietary blend also lacks a full breakdown, making its exact make-up unclear.
Value For Money35
The vitamin C is relatively costly for the amount supplied, while the rutin offers middling value. The value of the other ingredients remains uncertain.
Customer Satisfaction76
Customer feedback is highly positive. The relatively modest number of responses leaves less certainty than a larger review history would provide.
Product Focus39
Vitamin C provides the clearest support for normal immune function and collagen formation. Extra skin, eye or general-health benefits are not established once nutritional needs are met.
- Format
Capsule - Container
- 100 Capsule(s)
- Per serving
- $0.28
- Customer rating
- 4.9 · 129 ratings
Goals
Impact
Moderate effect
Vitamin C · 500 mg
Impact
High effect
Vitamin C · 500 mg
Impact
High effect
Vitamin C · 500 mg
Impact
Moderate effect
Vitamin C · 500 mg
Ingredients
| Ingredient | Amount per serving | Score |
|---|---|---|
Vitamin C (Threonic Acid enhanced buffered Calcium Ascorbate) | 500 mg | |
Calcium (Calcium Ascorbate) | 60 mg | |
Transport C-PLUS(R) | 650 mg | |
Citrus Bioflavonoid Complex | 100 mg | |
Acerola powder | 25 mg | |
Rose Hips powder | 25 mg | |
Rutin powder (Sophora japonica) | 25 mg |
The serving provides 500 mg of vitamin C, and its cost for that amount is high. The vitamin C comes from Calcium Ascorbate. The form is buffered.
How this ingredient is rated
Active Ingredient Quality & Bioavailability83
The vitamin C comes from Calcium Ascorbate. Calcium ascorbate is a buffered, non-acidic form.
Vitamin C Chemical Form & Delivery System
The vitamin C comes from Calcium Ascorbate.
Gastric Comfort & pH Balance
Calcium ascorbate is a buffered, non-acidic form.
Dose, Safety & Label Transparency91
Each serving provides 500 mg of vitamin C. No artificial colors or specified sweeteners are recorded among the other ingredients.
Optimal Dosage Targeting
Each serving provides 500 mg of vitamin C.
Purity & Excipient Quality
No artificial colors or specified sweeteners are recorded among the other ingredients.
Mineral & Source Transparency
The vitamin C amount and calcium amount are stated.
Value20
The cost for the amount of vitamin C is high.
Price per Gram of Vitamin C
The cost for the amount of vitamin C is high.
Rutin (Sophora japonica) · 25 mg OverallScore83
The serving provides 25 mg of rutin, with a moderate estimated whole-product cost for the declared rutin preparation. The rutin source or form isn't specified. The cost comparison uses preparation weight and remains an estimate.
How this ingredient is rated
Composition and Label Disclosure
No additional composition details are available.
Composition and Label Disclosure100
The active rutin amount is stated as 25 mg per serving.
Declared Active Rutin Amount
The label states 25 mg of active rutin per serving.
Commercial Price and Usability50
The estimated whole-product cost relative to the declared rutin preparation is moderate.
Whole-Product Cost per 100 mg Declared Rutin Preparation
The whole-product cost per 100 mg of declared rutin preparation is moderate; it is an estimate based on preparation weight.
Acerola · 25 mg OverallScore20
A serving provides 25 mg of acerola; there is no conclusion about its value per serving. The vitamin C content of the acerola preparation is unavailable. The botanical species is unavailable.
How this ingredient is rated
Composition and Label Disclosure20
The vitamin C content of the acerola preparation is unavailable.
Marker and Preparation Disclosure
The vitamin C content of the acerola preparation is unavailable.
Composition and Label Disclosure20
The serving provides 25 mg of acerola. The species and plant part are unavailable.
Acerola Botanical Identity Disclosure
The serving provides 25 mg of acerola. The species and plant part are unavailable.
Commercial Price and Usability
There is no conclusion about value per serving.
Alternative products
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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.
- A randomized, double-masked study on the treatment of retinal vein occlusion with troxerutin
- 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.
- The effects of rutin flavonoid supplement on glycemic status, lipid profile, atherogenic index of plasma, brain-derived neurotrophic factor (BDNF), some serum inflammatory, and oxidative stress factors in patients with type 2 diabetes mellitus: A double-blind, placebo-controlled trial.
- Rutin ameliorates inflammation and improves metabolic function: A comprehensive analysis of scientific literature.
- Rutin-loaded chitosan microspheres: Characterization and evaluation of the anti-inflammatory activity.
- Oral enzyme combination therapy reduces systemic inflammation, urinary CTXII and pain in knee osteoarthritis: a proof-of-mechanism, randomised, crossover, double-blind, placebo-controlled trial.