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Easy-C 500 mg

Natrol
4.8
★ ★ ★ ★ ★
(135 ratings)
Vitamin C 500 mg
Flavonoid (mixture) 200 mg
Product Image
Score83
Gentle vitamin C forms and a long supply make this easy to use daily, although bioflavonoid totals are not fully clear.
How scoring works
Quantity:240 Capsule(s) • (240 servings)
Goals:
General Health
Immunity
Skin Health
Anti-Inflammatory Support

Score 83

Gentle vitamin C forms and a long supply make this easy to use daily, although bioflavonoid totals are not fully clear.
How scoring works
$27.40($0.11 per serving)
iHerb
$ 27.40
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Analysis

Calcium ascorbate and ascorbyl palmitate form a non-acidic vitamin C base that should suit many people who find plain ascorbic acid uncomfortable. The moderate amount is practical for regular use and easier to fit into a broad supplement routine.

Citrus bioflavonoids from several fruits broaden the formula, but the supplied listing repeats the same amount for each source. That presentation makes the exact combined contribution harder to interpret than a single clearly totaled complex.

The one-capsule serving and long supply create convenient everyday value. Users wanting a full-gram amount would need more capsules, while those prioritizing comfort may see the moderate strength as an advantage.

Who is it for
  • Adults sensitive to acidic vitamin C
  • People wanting a moderate daily amount
  • Users seeking a long capsule supply
Best for
  • Gentle daily supplementation
  • Routine immune support
  • Collagen and antioxidant support

Pros

  • Non-acidic vitamin C forms
  • Practical daily amount
  • Clearly disclosed calcium
  • Long one-capsule supply

Cons

  • Bioflavonoid totals are ambiguous
  • Moderate rather than high potency
  • Ascorbyl palmitate contribution is not separated

Nutrient quality

88 Highest impact

Calcium ascorbate is buffered and ascorbyl palmitate adds a lipid-soluble form. The vitamin C and bioflavonoid amounts appear meaningful.

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Ingredient transparency

75 High impact

Active amounts are listed, but repeated citrus entries may describe sources rather than additive doses. A complete excipient list is not available in the provided data.

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Customer satisfaction

72 High impact

The average rating is very strong. The rating volume is adequate for a useful satisfaction signal.

.

Value for money

95 Highest impact

The very long supply creates excellent serving value. The focused formula contains no obvious low-value extras.

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Goals

General Health
General Health
Impact
Highest effect
B+ Goal FitA Strength of SupportC- CoverageA Formula Quality
Vitamin C · 500 mg

A fully buffered vitamin C blend offers foundational antioxidant and collagen support in a well-targeted serving. Calcium ascorbate and ascorbyl palmitate provide a gentler alternative to plain ascorbic acid.

The formula remains intentionally narrow and does not fill wider vitamin or mineral gaps. It is a strong fit for focused vitamin C support rather than comprehensive daily nutrition.

Study evidence
Vitamin C Supportive 56 studies
Immunity
Immunity
Impact
High effect
A- Goal FitA Strength of SupportC- CoverageB- Formula Quality
Vitamin C · 500 mg

Buffered calcium ascorbate and fat-soluble ascorbyl palmitate provide a useful vitamin C amount in gentler forms. Citrus bioflavonoids complement the antioxidant focus.

The label repeats the same bioflavonoid amount across four citrus sources, making the source allocation unclear. The formula remains focused mainly on vitamin C rather than broad immune coverage.

Study evidence
Vitamin C Supportive 53 studies
Skin Health
Skin Health
Impact
High effect
C+ Goal FitA- Strength of SupportD+ CoverageB+ Formula Quality
Vitamin C · 500 mg

Vitamin C supports collagen synthesis and antioxidant defense but does not directly supply collagen or barrier lipids. Evidence firmly supports vitamin C as a collagen cofactor, while oral vitamin C alone has limited evidence for visible skin changes in replete users.

The disclosed vitamin C amount is well aligned for daily support. The formula uses vitamin C in a logical role without conflicting actives.

Study evidence
Vitamin C Supportive 53 studies
Anti-Inflammatory Support
Cellular Defense
Anti-Inflammatory Support
Impact
High effect
C+ Goal FitB+ Strength of SupportC- CoverageA- Formula Quality
Vitamin C · 500 mg

Buffered calcium ascorbate and fat-soluble ascorbyl palmitate provide a well-targeted vitamin C serving with complementary citrus bioflavonoids. The combination supports antioxidant protection but does not cover the goal as broadly as fish oil or targeted botanicals.

Clear amounts and gentler vitamin C forms strengthen confidence in daily use. The compact formula gives useful depth without crowding the label.

Study evidence
Vitamin C Supportive 50 studies
Vision Support
Macular and Blue Light Defense
Vision Support
Impact
Moderate effect
F Goal FitA Strength of SupportD- CoverageB+ Formula Quality
Vitamin C · 500 mg

Buffered vitamin C supports ocular antioxidant defense and may be gentler than plain ascorbic acid. It does not provide macular pigments, retinal lipids, or an eye-focused mineral combination.

The amount is strong and the calcium ascorbate blend is clearly disclosed. The simple formula works as a supporting antioxidant rather than broad vision support.

Study evidence
Vitamin C Disputed 24 studies

Ingredients

IngredientAmount per serving
Vitamin C (Ascorbyl Palmitate, Calcium Ascorbate)
 500 mg
Calcium (Calcium Ascorbate)
 50 mg
Citrus Bioflavonoid Complex (Lemons, Limes, Oranges, Tangerines)
 200 mg
Adults 18–50 Dairy Free
Report overview
Vitamin C (Ascorbyl Palmitate, Calcium Ascorbate) · 500 mg OverallScore85
B+ Active Ingredient Quality & BioavailabilityA Dose, Safety & Label TransparencyB+ Value

Calcium ascorbate and ascorbyl palmitate provide a fully non-acidic blend with clearly disclosed calcium. The 500 mg serving is well targeted and should suit users seeking a gentler form. Cost per gram is good for a buffered formulation.

View ingredientView products
Loading alternative details
89 Performance

C-500 Calcium Ascorbate-C

NOW
<p>The ingredient profile makes it a stronger quality-focused alternative for the same vitamin C goals. Buffered calcium ascorbate delivers a practical vitamin C amount with clear mineral disclosure and exceptional relative value. The small bioflavonoid addition is unlikely to contribute much but does not undermine the strong core formula.</p>
86 Performance

C

Swanson
<p>The ingredient profile makes it a stronger quality-focused alternative for the same vitamin C goals. Fully buffered calcium ascorbate provides a meaningful vitamin C serving with good stomach-comfort potential. The focused formula keeps the active nutrient clear and avoids decorative additions.</p>
87 Performance

Ester-C with Citrus Bioflavonoids

American Health
<p>The ingredient profile makes it a stronger quality-focused alternative for the same vitamin C goals. A buffered vitamin C form and a substantial citrus bioflavonoid amount create a simple, well-dosed antioxidant formula. Strong satisfaction signals and a long supply support value, though excipients and intake directions are not shown.</p>
89 Budget

Pure Buffered Calcium Ascorbate

NOW
<p>The lower serving cost makes it a more economical alternative while retaining the same vitamin C focus. the buffered mineral ascorbate form supplies a meaningful vitamin C amount with a digestive-comfort advantage over plain ascorbic acid. Clear active dosing and favorable serving value are strengths, though complete use directions and inactive ingredients are not supplied.</p>
87 Budget

100% Pure Vitamin C Powder

Swanson Premium Brand
<p>The lower serving cost makes it a more economical alternative while retaining the same vitamin C focus. The pure powder supplies a flexible, meaningful vitamin C serving with exceptional economy and no active padding. Plain ascorbic acid remains acidic, so sensitive users may prefer a buffered form.</p>
87 Budget

C 500 mg

Mason Natural
<p>The lower serving cost makes it a more economical alternative while retaining the same vitamin C focus. A simple moderate-dose tablet provides useful vitamin C at excellent relative value and with extensive aggregate feedback. Generic ascorbic acid and missing inactive-ingredient details are the main limitations.</p>
87 Value

Pure Buffered Magnesium Ascorbate

NOW
<p>The formula offers a more favorable balance of vitamin C quality and serving value than the original. Magnesium ascorbate provides a substantial fully buffered vitamin C serving with excellent relative value and clear mineral disclosure. Feedback volume is limited, and detailed use directions or non-active ingredients are not supplied.</p>
83 Value

C 500 mg

21st Century
<p>The formula offers a more favorable balance of vitamin C quality and serving value than the original. A large supply of straightforward vitamin C provides meaningful daily support with excellent value. Basic ascorbic acid and incomplete inactive-ingredient details keep the formula from feeling premium.</p>
84 Value

Ester-C 500 mg With Citrus Bioflavoinds

American Health
<p>The formula offers a more favorable balance of vitamin C quality and serving value than the original. Buffered Ester-C provides a substantial vitamin C serving with good stomach-comfort potential. Citrus bioflavonoids add compatible plant compounds without distracting from the core nutrient.</p>
Report alternatives

Sources

Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.

  1. Efficacy of Vitamin C as Glucocorticoid Substitute for Reducing Pain and Inflammation After Total Hip Arthroplasty: A Randomized Controlled Trial.
    Jiang W; Xu H; Jiang X; Zhan Y; Ju Y; Xie J; Huang Z; Huang Q; Pei F · The Journal of bone and joint surgery. American volume · 2025
    Randomized trial107 participantsAnti-Inflammatory Support forVitamin C
  2. The Impact of Vitamin C on Analgesic, Anti-inflammatory, and Hemostatic Outcomes After Total Hip and Knee Arthroplasty: A Systematic Review and Meta-Analysis.
    Moftakhari Hajimirzaei S; Bagherzadeh Cham M; Dolikhani M; Tabatabaee SM; Ebrahimpour A · The archives of bone and joint surgery · 2026
    Meta-analysis1,162 participants10 studies pooledAnti-Inflammatory Support forVitamin C
  3. The impact of vitamin C supplementation on the perioperative outcomes after total hip and knee arthroplasty: a systematic review and meta-analysis.
    Liu X; Guo J; Li Y; Yang Y; Liu M; Gao Q; Yang Y; Wu X; Yue C · BMC musculoskeletal disorders · 2026
    Meta-analysis852 participants8 studies pooledAnti-Inflammatory Support forVitamin C
  4. Therapeutic Impact of Ascorbic Acid on Oral and Periodontal Tissues: A Systematic Literature Review.
    Ruzijevaite G; Acaite E; Jagelaviciene E · Medicina (Kaunas, Lithuania) · 2025
    Systematic review811 participants17 studies pooledAnti-Inflammatory Support forVitamin C
  5. Oral vitamin C administration reduces early recurrence rates after electrical cardioversion of persistent atrial fibrillation and attenuates associated inflammation.
    Korantzopoulos P; Kolettis TM; Kountouris E; Dimitroula V; Karanikis P; Pappa E; Siogas K; Goudevenos JA · International journal of cardiology · 2005
    Randomized trial44 participantsAnti-Inflammatory Support forVitamin C
  6. 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.
    Aune D; Keum N; Giovannucci E; Fadnes LT; Boffetta P; Greenwood DC; Tonstad S; Vatten LJ; Riboli E; Norat T · The American journal of clinical nutrition · 2019
    Meta-analysis69 studies pooledGeneral Health forVitamin C
  7. 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.
    EFSA Panel on Dietetic Products, Nutrition and Allergies (NDA) · EFSA journal. European Food Safety Authority · 2026
    Guideline / consensusGeneral Health forVitamin C
  8. Vitamin C Depletion and All-Cause Mortality in Renal Transplant Recipients.
    Sotomayor CG; Eisenga MF; Gomes Neto AW; Ozyilmaz A; Gans ROB; Jong WHA; Zelle DM; Berger SP; Gaillard CAJM; Navis GJ; Bakker SJ · Nutrients · 2018
    Cohort study598 participantsGeneral Health forVitamin C
  9. 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.
    Pu L; Zhang R; Wang X; Zhao T; Sun H; Han L · Frontiers in nutrition · 2022
    Cohort study12,530 participantsGeneral Health forVitamin C
  10. 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.
    Khaw KT; Bingham S; Welch A; Luben R; Wareham N; Oakes S; Day N · Lancet (London, England) · 2001
    Cohort study19,496 participantsGeneral Health forVitamin C
  11. 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.
    EFSA Panel on Dietetic Products, Nutrition and Allergies (NDA) · EFSA journal. European Food Safety Authority · 2026
    Guideline / consensusImmunity forVitamin C
  12. Therapeutic effects of high-dose vitamin C supplementation in patients with COVID-19: a meta-analysis.
    Sun L; Zhao JH; Fan WY; Feng B; Liu WW; Chen RQ; Ban C; Dang AG; Wang M; Luo KT; Zhou GY; Yu FF; Ba Y · Nutrition reviews · 2024
    Meta-analysis2,334 participants14 studies pooledImmunity forVitamin C
  13. Effect of micronutrient supplements on influenza and other respiratory tract infections among adults: a systematic review and meta-analysis.
    Abioye AI; Bromage S; Fawzi W · BMJ global health · 2021
    Meta-analysisImmunity forVitamin C
  14. New evidence for antioxidant properties of vitamin C.
    Vojdani A; Bazargan M; Vojdani E; Wright J · Cancer detection and prevention · 2001
    Randomized trial20 participantsImmunity forVitamin C
  15. Enhanced Vitamin C Delivery: A Systematic Literature Review Assessing the Efficacy and Safety of Alternative Supplement Forms in Healthy Adults.
    Calder PC; Kreider RB; McKay DL · Nutrients · 2025
    Systematic review13 studies pooledImmunity forVitamin C
  16. Evaluation of the anti-wrinkle effect of an ascorbic acid-loaded dissolving microneedle patch via a double-blind, placebo-controlled clinical study.
    Lee C; Yang H; Kim S; Kim M; Kang H; Kim N; An S; Koh J; Jung H · International journal of cosmetic science · 2017
    Randomized trial23 participantsSkin Health forVitamin C
  17. Comparative Study on the Outcome of Periorbital Wrinkles Treated with Laser-Assisted Delivery of Vitamin C or Vitamin C Plus Growth Factors: A Randomized, Double-blind, Clinical Trial.
    Machado BHB; Frame J; Zhang J; Najlah M · Aesthetic plastic surgery · 2021
    Randomized trial149 participantsSkin Health forVitamin C
  18. Randomized trial of topical ascorbic acid in DMSO versus imiquimod for the treatment of basal cell carcinoma.
    Burke B; Bailie JE · Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie · 2022
    Randomized trial25 participantsSkin Health forVitamin C
  19. Vitamin C improves healing of foot ulcers: a randomised, double-blind, placebo-controlled trial.
    Gunton JE; Girgis CM; Lau T; Vicaretti M; Begg L; Flood V · The British journal of nutrition · 2022
    Randomized trial16 participantsSkin Health forVitamin C
  20. Dietary nutrient intakes and skin-aging appearance among middle-aged American women.
    Cosgrove MC; Franco OH; Granger SP; Murray PG; Mayes AE · The American journal of clinical nutrition · 2007
    Cross-sectional study4,025 participantsSkin Health forVitamin C
  21. Role of Oral Vitamin 'C' on Astigmatic Errors in Phacoemulsification.
    Mohan S; Sah K; Khattri M; Ahmad L; Sachan SK · Current eye research · 2021
    Randomized trial400 participantsVision Support forVitamin C
  22. Ascorbic acid metabolites are involved in intraocular pressure control in the general population.
    Hysi PG; Khawaja AP; Menni C; Tamraz B; Wareham N; Khaw KT; Foster PJ; Benet LZ; Spector TD; Hammond CJ · Redox biology · 2019
    Observational studyVision Support forVitamin C
  23. Nutritional modulation of cataract.
    Weikel KA; Garber C; Baburins A; Taylor A · Nutrition reviews · 2014
    Narrative reviewVision Support forVitamin C
  24. Dietary n-3 Fatty Acid, α-Tocopherol, Zinc, vitamin D, vitamin C, and β-carotene are Associated with Age-Related Macular Degeneration in Japan.
    Aoki A; Inoue M; Nguyen E; Obata R; Kadonosono K; Shinkai S; Hashimoto H; Sasaki S; Yanagi Y · Scientific reports · 2017
    Case-control study530 participantsVision Support forVitamin C
  25. Adherence to a Mediterranean diet, lifestyle and age-related macular degeneration: the Coimbra Eye Study - report 3.
    Raimundo M; Mira F; Cachulo MDL; Barreto P; Ribeiro L; Farinha C; Laíns I; Nunes S; Alves D; Figueira J; Merle BM; Delcourt C; Santos L; Silva R · Acta ophthalmologica · 2019
    Case-control study883 participantsVision Support forVitamin C