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High Potency Maxi-Collagen 7000

Country Life
4.7
★ ★ ★ ★ ★
(3646 ratings)
Collagen 4500 mg
Biotin 300 mcg
Protein (unspecified) 6 Gram(s)
Product Image
Score83
Best suited to adults seeking a high-dose liquid collagen for skin, hair, and nails; biotin, vitamin C, and vitamin A add useful cofactors, but the product remains focused on collagen rather than filling broader nutritional gaps.
How scoring works
Quantity:7 Liquid(s) • (30 servings)
Goals:
Nail Health
Anti-Aging
Skin Health
Hair Health

Score 83

Best suited to adults seeking a high-dose liquid collagen for skin, hair, and nails; biotin, vitamin C, and vitamin A add useful cofactors, but the product remains focused on collagen rather than filling broader nutritional gaps.
How scoring works
$22.49($0.74 per serving)
Vitacost
$ 22.49
iHerb
$ 22.49
Pure Formulas
$ 22.49
Amazon
$ 22.49
iHerb
$ 22.49
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Analysis

A combined 7 g of type I and III collagen and Verisol peptides creates a substantial, absorption-friendly structural serving. The disclosed amounts make the main contribution reasonably easy to judge.

Biotin, vitamin C, and vitamin A add useful cofactors, but the product remains focused on collagen rather than filling broader nutritional gaps. Practical value depends on whether the main active and format match the user’s priority.

The product is best suited to adults seeking a high-dose liquid collagen for skin, hair, and nails. Benefits for appearance, structure, or wellness should be viewed as nutritional support rather than a guaranteed visible change.

Who is it for
  • Adults seeking a high-dose liquid collagen for skin, hair, and nails
  • Adults whose diet leaves a gap addressed by the core ingredients
  • Users comfortable with the listed format and serving size
Best for
  • Meaningful total collagen amount
  • Includes branded Verisol collagen peptides
  • Users who accept that collagen animal source is not stated in the supplied data

Pros

  • Meaningful total collagen amount
  • Includes branded Verisol collagen peptides
  • Provides vitamin C for normal collagen formation
  • Strong fit across skin, hair, and nail goals

Cons

  • Collagen animal source is not stated in the supplied data
  • Liquid format may be less portable than tablets
  • Inactive and flavoring ingredients are not supplied
  • Retinyl palmitate adds preformed vitamin A that some users may not need

Warnings

  • The collagen source is not stated, so users with animal-protein allergies or dietary restrictions should verify the package.
  • Preformed vitamin A from retinyl palmitate should be counted with other vitamin A supplements, particularly during pregnancy.
  • Liquid flavoring and excipient details are absent, so users with additive sensitivities should check the current label.

Nutrient quality

94 Highest impact

Hydrolyzed collagen and branded bioactive collagen peptides are well-defined forms, and the combined collagen amount is substantial, with useful vitamin C and biotin support. No listed amount appears unnecessarily aggressive, while the focused formula avoids low-value active extras.

Ingredient transparency

79 High impact

Specific amounts are listed for every supplied active ingredient. No proprietary blend hides active doses, while flavoring, sweeteners, preservatives, and other inactive liquid ingredients are not provided.

Customer satisfaction

72 High impact

The supplied aggregate satisfaction metric is favorable, and the large amount of aggregate feedback makes the metric highly stable. No review excerpts were provided, so recurring complaints and purpose-specific experiences cannot be checked.

Value for money

86 Highest impact

Strong collagen dosing and a focused formula support good value. Each serving provides a meaningful structural protein dose at a moderate cost, while the formula avoids low-value extras.

Report analysis

Goals

Nail Health
Nail Health
Impact
Highest effect
A Goal FitA+ Strength of SupportA- CoverageA+ Formula Quality
Collagen · 2500 mgBiotin · 300 mcg

Hydrolyzed collagen peptides, d-biotin, and vitamin C directly support nail structure and keratin-related growth. Human evidence supports collagen peptides for nail growth and breakage, with biotin adding evidence for brittle nails.

Seven grams of total collagen, including 2.5 grams of Verisol, provide a substantial structural dose. Branded bioactive collagen peptides, identified collagen types, d-biotin, and exact amounts support strong disclosure. The collagen is animal-derived, so the undisclosed animal source may matter to users with dietary or allergy restrictions.

Study evidence
Biotin Supportive 8 studies
Collagen Supportive 4 studies
Vitamin C Supportive 1 study
Anti-Aging
Anti-Aging
Impact
Highest effect
A Goal FitA+ Strength of SupportB CoverageA+ Formula Quality
Collagen · 2500 mg

A seven-gram collagen blend directly supports age-related skin and connective-tissue changes. Branded Verisol peptides, types I and III collagen, and vitamin C create a strong structural-support core.

Vitamin A and biotin add skin-related nutritional support without diluting the main dose. The animal source and amino-acid profile are not disclosed, which leaves some quality uncertainty.

Study evidence
Collagen Supportive 33 studies
Vitamin C Supportive 30 studies
Skin Health
Skin Health
Impact
Highest effect
A Goal FitA Strength of SupportB+ CoverageA Formula Quality
Vitamin C · 90 mgCollagen · 2500 mg

A substantial collagen blend directly supports skin structure, hydration, and elasticity. Branded Verisol peptides add human evidence for visible skin outcomes.

Vitamin C complements collagen formation, while vitamin A and biotin provide secondary support. The animal source and amino acid profile are not disclosed, and stated protein is somewhat lower than total collagen.

Study evidence
Biotin Supportive 10 studies
Collagen Supportive 62 studies
Vitamin A Supportive 106 studies
Vitamin C Supportive 53 studies
Hair Health
Hair Health
Impact
Highest effect
B+ Goal FitA Strength of SupportB CoverageA+ Formula Quality
Biotin · 300 mcgVitamin C · 90 mgCollagen · 2500 mg

A substantial collagen blend provides amino acid building blocks for keratin and connective tissue around hair follicles. Vitamin C supports collagen synthesis, while biotin adds a second deficiency-related hair pathway.

Hydrolyzed peptides and branded Verisol improve active quality, although the animal source and amino acid profile are not disclosed. The formula is well focused on structural support, but hair-specific evidence for oral collagen remains less direct than its skin evidence.

Study evidence
Biotin Supportive 4 studies
Collagen Supportive 3 studies
Vitamin C Mixed 5 studies

Ingredients

IngredientAmount per serving
Calories
25 Calorie(s)
Protein
6 Gram(s)
Vitamin A (Retinyl Palmitate)
 300 mcg
Vitamin C (Ascorbic Acid)
 90 mg
Biotin (D-Biotin)
 300 mcg
Collagen Type l and lll
4500 mg
Verisol Bioactive Collagen Peptides
2500 mg
Gluten Free Adults 18–50 Dairy Free
Report overview
Collagen · 4500 mg OverallScore77
A- Active Ingredient Quality & BioavailabilityC- Dose, Safety & Label TransparencyA+ Value

The blend provides a substantial collagen amount and includes branded Verisol peptides alongside identified collagen types. The animal source and amino acid profile are not disclosed, while the listed protein is somewhat lower than the collagen claim. Its high dose and low cost per gram make it an efficient option.

View ingredientView products
Biotin (D-Biotin) · 300 mcg OverallScore66
A+ Active Ingredient Quality & BioavailabilityF Dose, Safety & Label TransparencyC Value

The active d-biotin form is clearly identified, but its amount is low for targeted hair or nail support. Collagen peptides are the main active feature, making biotin a supporting nutrient rather than the core ingredient. The clean liquid format and collagen content support a neutral value assessment.

View ingredientView products
Loading alternative details
75 Performance

Hair Collagen + Keratin

youtheory
Hydrolyzed collagen, keratin, and biotin are all meaningfully dosed for hair and nail support. Its added beauty-support breadth makes it a reasonable quality-led alternative, although it does not clearly surpass every strength of the original.
73 Performance

Collagen Beauty

Irwin Naturals
Branded collagen peptides, vitamin C, biotin, flaxseed oil, and several plant oils create a coherent beauty formula with meaningful skin-structure support. Its added beauty-support breadth makes it a reasonable quality-led alternative, although it does not clearly surpass every strength of the original.
75 Performance

Grass Fed Collagen Beauty Cranberry Pomegranate

Garden of Life
A substantial collagen-peptide serving with vitamin C, silica, and biotin directly supports the intended beauty focus. Its added beauty-support breadth makes it a reasonable quality-led alternative, although it does not clearly surpass every strength of the original.
87 Budget

Collagen + C 2500 mg

Spring Valley
Branded collagen and vitamin C create a focused structural formula with a meaningful collagen amount and efficient serving value. It retains relevant collagen and beauty support at a lower recurring cost than the original, with the stated limitation affecting how closely it matches.
84 Budget

Tri-Layer Maxi-Skin Collagen + C & A

Country Life
Branded collagen peptides reach a meaningful skin-focused amount, with vitamin C providing a logical synthesis cofactor. It retains relevant collagen and beauty support at a lower recurring cost than the original, with the stated limitation affecting how closely it matches.
58 Budget

Alive! Hair Skin & Nails Gummies Delicious Strawberry Flavored

Nature's Way
Biotin and vitamin C support the beauty positioning, but the collagen amount is far below meaningful gram-level servings. It retains relevant collagen and beauty support at a lower recurring cost than the original, with the stated limitation affecting how closely it matches.
73 Value

Collagen 1500 + C

Mason Natural
Hydrolyzed bovine collagen, vitamin C, and biotin form a focused beauty formula, but the collagen amount is modest compared with stronger gram-level products. Its focused ingredient profile and lower recurring cost improve value, although structural coverage is less complete than the original.
66 Value

Hydrolyzed Collagen Powder Unflavored

Green Foods
Hydrolyzed bovine collagen with identified types is a suitable form, but the declared collagen amount conflicts sharply with the much larger protein amount. Its focused ingredient profile and lower recurring cost improve value, although structural coverage is less complete than the original.
68 Value

Alive! Hair Skin & Nails Gummies Delicious Strawberry Flavored

Nature's Way
Vitamin C, biotin, and zinc support hair and nail nutrition, but the collagen and silica amounts are small for structural support. Its focused ingredient profile and lower recurring cost improve value, although structural coverage is less complete than the original.
Report alternatives

Sources

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

  1. Evaluation of biophysical skin parameters and hair changes in patients with acne vulgaris treated with isotretinoin, and the effect of biotin use on these parameters.
    Aksac SE; Bilgili SG; Yavuz GO; Yavuz IH; Aksac M; Karadag AS · International journal of dermatology · 2021
    Non-randomized trial60 participantsSkin Health forBiotin
  2. Anti-pollution cosmetic-based one-step formation of w/o/w multiple emulsion containing D-biotin for skin protection: fabrication and in vitro and in vivo evaluation.
    Ali A; Iqbal S; Ilyas A; Khan H; Asad MHHB; Fatima N; Akhtar N · Drug delivery and translational research · 2020
    Non-randomized trial15 participantsSkin Health forBiotin
  3. Interventions for infantile seborrhoeic dermatitis (including cradle cap).
    Victoire A; Magin P; Coughlan J; van Driel ML · The Cochrane database of systematic reviews · 2019
    Systematic review35 participants2 studies pooledSkin Health forBiotin
  4. Exploring the Impact of Hydrolyzed Collagen Oral Supplementation on Skin Rejuvenation: A Systematic Review and Meta-Analysis.
    Dewi DAR; Arimuko A; Norawati L; Yenny SW; Setiasih NL; Perdiyana A; Arkania N; Nadhira F; Wiliantari N · Cureus · 2024
    Meta-analysis967 participants14 studies pooledSkin Health forCollagen
  5. Effects of collagen-based supplements on skin's hydration and elasticity: A systematic review and meta-analysis.
    Danessa G; Notario D; Regina R · Indian journal of dermatology, venereology and leprology · 2025
    Meta-analysis646 participants10 studies pooledSkin Health forCollagen
  6. Efficacy and Safety of Topical or Oral Hydrolyzed Collagen in Women with Dermatoporosis: A Randomized, Double-Blind, Factorial Design Study.
    Guadanhim LRS; Miot HA; Soares JLM; Silva SAM; Leonardi GR; Lopes RD; Bagatin E · Dermatology and therapy · 2023
    Randomized trial56 participantsSkin Health forCollagen
  7. The Role of Sesbania grandiflora-Derived Biotin and Bambusa arundinacea-Derived Silica Extracts in Promoting Hair, Skin, and Nail Health: A Randomized, Double-Blind, Placebo-Controlled Clinical Study.
    Patel MN; Maheshvari J; Patel N · Cureus · 2025
    Randomized trial105 participantsHair Health Nail Health Skin Health forBiotin
  8. The Infatuation With Biotin Supplementation: Is There Truth Behind Its Rising Popularity? A Comparative Analysis of Clinical Efficacy versus Social Popularity.
    Soleymani T; Lo Sicco K; Shapiro J · Journal of drugs in dermatology : JDD · 2018
    Narrative reviewHair Health forBiotin
  9. Vitamins A, B, C, and D: A Short Review for the Dermatologist.
    Coerdt KM; Goggins CA; Khachemoune A · Alternative therapies in health and medicine · 2021
    Narrative reviewHair Health forBiotin
  10. Low-Molecular-Weight Collagen Peptide Supplementation Improves Cellulite Severity, Skin Elasticity, and Hair Shaft Diameter: A Clinical Study with Pharmacokinetic Evaluation.
    Hwang S; Won J; Kim S; Kang W; Park M · Journal of medicinal food · 2026
    Randomized trial114 participantsHair Health forCollagen
  11. Calcium and Vitamin D Supplementation with and Without Collagen on Bone Density and Skin Elasticity in Menopausal Women-A Randomized Controlled Study.
    Duangjai A; Srivilai J; Nangola S; Amornlerdpison D · Clinics and practice · 2025
    Randomized trialHair Health forCollagen
  12. Dietary Collagen Supplementation as a Strategy for Skin Health: A Narrative Review of Clinical Effects on Skin, Hair, Nails, and Wound Healing.
    Biełach-Bazyluk A; Jurga M; Flisiak I; Zbroch E · Nutrients · 2026
    Narrative reviewHair Health forCollagen
  13. Oral intake of collagen peptide NS improves hydration, elasticity, desquamation, and wrinkling in human skin: a randomized, double-blinded, placebo-controlled study.
    Lee M; Kim E; Ahn H; Son S; Lee H · Food & function · 2023
    Randomized trial100 participantsAnti-Aging Skin Health forCollagen
  14. Effects of hydrolyzed collagen supplementation on skin aging: a systematic review and meta-analysis.
    de Miranda RB; Weimer P; Rossi RC · International journal of dermatology · 2021
    Meta-analysis1,125 participants19 studies pooledAnti-Aging Skin Health forCollagen
  15. Oral supplementation of specific collagen peptides has beneficial effects on human skin physiology: a double-blind, placebo-controlled study.
    Proksch E; Segger D; Degwert J; Schunck M; Zague V; Oesser S · Skin pharmacology and physiology · 2014
    Randomized trial69 participantsAnti-Aging forCollagen
  16. Skin Anti-Aging and Moisturizing Effects of Low-Molecular-Weight Collagen Peptide Supplementation in Healthy Adults: A Randomized, Double-Blind, Placebo-Controlled Clinical Trial.
    Lee E; Ahn DK; Kim JH; Lee S; Kim HJ; Lee HK; Shin JH · Journal of microbiology and biotechnology · 2025
    Randomized trial70 participantsAnti-Aging forCollagen
  17. Oral intake of specific bioactive collagen peptides reduces skin wrinkles and increases dermal matrix synthesis.
    Proksch E; Schunck M; Zague V; Segger D; Degwert J; Oesser S · Skin pharmacology and physiology · 2014
    Randomized trial114 participantsAnti-Aging forCollagen
  18. Study on the Multiple Efficacies of Vitamin C Serum in Anti-Glycation, Anti-Carbonylation, Antioxidation, and Anti-Inflammation of Human Skin Based on In Vivo Tests.
    Zi Y; Liu J; Liu Q; Pan Y; Jiang X · Journal of cosmetic dermatology · 2026
    Randomized trial66 participantsAnti-Aging forVitamin C
  19. Evaluation of the anti-wrinkle effect of a lipophilic pro-vitamin C derivative, tetra-isopalmitoyl ascorbic acid.
    Yokota M; Yahagi S · Journal of cosmetic dermatology · 2022
    Randomized trial69 participantsAnti-Aging forVitamin C
  20. The role of vitamin C in pushing back the boundaries of skin aging: an ultrasonographic approach.
    Crisan D; Roman I; Crisan M; Scharffetter-Kochanek K; Badea R · Clinical, cosmetic and investigational dermatology · 2015
    Clinical trial60 participantsAnti-Aging forVitamin C
  21. In vivo evaluation of topical ascorbic acid application on skin aging by 50 MHz ultrasound.
    Vergilio MM; Aiello LM; Furlan AS; Caritá AC; Azevedo JR; Bolzinger MA; Chevalier Y; Leonardi GR · Journal of cosmetic dermatology · 2022
    Randomized trial25 participantsAnti-Aging forVitamin C
  22. Clinical Applications of Vitamin C in Dermatology: A Systematic Review.
    Boghosian T; Mendez H; Boghosian N; Sayegh M; Beer J; Tosti A · The Journal of clinical and aesthetic dermatology · 2026
    Systematic review44 studies pooledAnti-Aging forVitamin C
  23. Low serum biotinidase activity in children with valproic acid monotherapy.
    Schulpis KH; Karikas GA; Tjamouranis J; Regoutas S; Tsakiris S · Epilepsia · 2001
    Clinical trial125 participantsHair Health Skin Health forBiotin
  24. Management of hair loss associated with endocrine therapy in patients with breast cancer: an overview.
    Karatas F; Sahin S; Sever AR; Altundag K · SpringerPlus · 2016
    Narrative reviewHair Health forVitamin C
  25. Elucidating causal relationships of diet-derived circulating antioxidants and the risk of non-scarring alopecia: A Mendelian randomization study.
    Ba Y; Shen L; Peng X; Zhang Y; Wang J · Medicine · 2024
    Methods validation study201,019 participantsHair Health forVitamin C
  26. Alterations of plasma antioxidants and mitochondrial DNA mutation in hair follicles of smokers.
    Liu CS; Chen HW; Lii CK; Tsai CS; Kuo CL; Wei YH · Environmental and molecular mutagenesis · 2002
    Observational studyHair Health forVitamin C
  27. Removal of synthetic hair dye using formamidine sulfinic acid and other sulfinate precursors.
    Hawkes JA; Lewis DM; Mama J; Murray J · International journal of cosmetic science · 2026
    Methods validation studyHair Health forVitamin C
  28. A Zinc Sulphate-Resistant Acrodermatitis Enteropathica Patient with a Novel Mutation in SLC39A4 Gene.
    Kilic M; Taskesen M; Coskun T; Gürakan F; Tokatli A; Sivri HS; Dursun A; Schmitt S; Küry S · JIMD reports · 2013
    Case reportHair Health forVitamin C
  29. Biotin for the treatment of nail disease: what is the evidence?
    Lipner SR; Scher RK · The Journal of dermatological treatment · 2018
    Narrative reviewNail Health forBiotin
  30. Treatment of brittle fingernails and onychoschizia with biotin: scanning electron microscopy.
    Colombo VE; Gerber F; Bronhofer M; Floersheim GL · Journal of the American Academy of Dermatology · 1991
    Other32 participantsNail Health forBiotin
  31. Treatment of brittle nail with a hydroxypropyl chitosan-based lacquer, alone or in combination with oral biotin: A randomized, assessor-blinded trial.
    Chiavetta A; Mazzurco S; Secolo MP; Tomarchio G; Milani M · Dermatologic therapy · 2020
    Randomized trial50 participantsNail Health forBiotin
  32. Vitamins and minerals: their role in nail health and disease.
    Scheinfeld N; Dahdah MJ; Scher R · Journal of drugs in dermatology : JDD · 2007
    Narrative reviewNail Health forBiotin
  33. Oral supplementation with specific bioactive collagen peptides improves nail growth and reduces symptoms of brittle nails.
    Hexsel D; Zague V; Schunck M; Siega C; Camozzato FO; Oesser S · Journal of cosmetic dermatology · 2018
    Single-arm trial25 participantsNail Health forCollagen
  34. Influence of collagen peptide supplementation on visible signs of skin and nail health and -aging in an East Asian population: A double blind, randomized, placebo-controlled trial.
    Vleminckx S; Virgilio N; Asserin J; Prawitt J; Silva CIF · Journal of cosmetic dermatology · 2024
    Randomized trial85 participantsNail Health forCollagen
  35. Nail Supplements: When, How, and Why?
    Zaraa I; Richert B · Skin appendage disorders · 2026
    Narrative reviewNail Health forCollagen
  36. Expanding the COL7A1 mutation database: novel and recurrent mutations and unusual genotype-phenotype constellations in 41 patients with dystrophic epidermolysis bullosa.
    Kern JS; Kohlhase J; Bruckner-Tuderman L; Has C · The Journal of investigative dermatology · 2006
    Observational study41 participantsNail Health forCollagen
  37. Vitamin C Deficiency in Inflammatory Bowel Disease: The Forgotten Micronutrient.
    Dunleavy KA; Ungaro RC; Manning L; Gold S; Novak J; Colombel JF · Crohn's & colitis 360 · 2023
    Other20 participantsNail Health forVitamin C
  38. Generalized seborrhoeic dermatitis. Clinical and therapeutic data of 25 patients.
    Messaritakis J; Kattamis C; Karabula C; Matsaniotis N · Archives of disease in childhood · 1976
    Non-randomized trial25 participantsSkin Health forBiotin
  39. Holocarboxylase synthetase deficiency: novel clinical and molecular findings.
    Tammachote R; Janklat S; Tongkobpetch S; Suphapeetiporn K; Shotelersuk V · Clinical genetics · 2010
    Case series4 participantsSkin Health forBiotin
  40. Oral Intake of Low-Molecular-Weight Collagen Peptide Improves Hydration, Elasticity, and Wrinkling in Human Skin: A Randomized, Double-Blind, Placebo-Controlled Study.
    Kim DU; Chung HC; Choi J; Sakai Y; Lee BY · Nutrients · 2018
    Randomized trial64 participantsSkin Health forCollagen
  41. Efficacy and Tolerability of Topical 0.1% Stabilized Bioactive Retinol for Photoaging: A Vehicle-Controlled Integrated Analysis.
    Farris P; Berson D; Bhatia N; Goldberg D; Lain E; Mariwalla K; Zeichner J; Miller D; McGuire T; Kizoulis M · Journal of drugs in dermatology : JDD · 2024
    Meta-analysis471 participants6 studies pooledSkin Health forVitamin A
  42. Tensile properties and contours of aging facial skin. A controlled double-blind comparative study of the effects of retinol, melibiose-lactose and their association.
    Piérard-Franchimont C; Castelli D; Cromphaut IV; Bertin C; Ries G; Cauwenbergh G; Piérard GE · Skin research and technology : official journal of International Society for Bioengineering and the Skin (ISBS) [and] International Society for Digital Imaging of Skin (ISDIS) [and] International Society for Skin Imaging (ISSI) · 2016
    Randomized trial120 participantsSkin Health forVitamin A
  43. Antiaging action of retinol: from molecular to clinical.
    Bellemère G; Stamatas GN; Bruère V; Bertin C; Issachar N; Oddos T · Skin pharmacology and physiology · 2009
    Randomized trial48 participantsSkin Health forVitamin A
  44. An Updated Review of Topical Tretinoin in Dermatology: From Acne and Photoaging to Skin Cancer.
    Balado-Simó P; Morgado-Carrasco D; Gómez-Armayones S; López-Ferrer A; Barco D; Ferrándiz-Pulido C; Podlipnik S · Journal of clinical medicine · 2025
    Narrative reviewSkin Health forVitamin A
  45. Novel Cyclized Hexapeptide-9 Outperforms Retinol Against Skin Aging: A Randomized, Double-Blinded, Active- and Vehicle-Controlled Clinical Trial.
    Chang H; Tao K; Yang Y; Wang Y; Ge M; Wang X; Tang S; Yu H · Journal of cosmetic dermatology · 2025
    Randomized trialSkin Health forVitamin A
  46. 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
  47. 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
  48. 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
  49. 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
  50. 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