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Hair Skin & Nails

Bluebonnet Beautiful Ally
4.7
★ ★ ★ ★ ★
(317 ratings)
Biotin 5000 mcg
Keratin 50 mg
Coenzyme Q-10 25 mg
Glutathione 40 mg
Resveratrol 20 mg
Collagen 500 mg
Product Image
Score70
A well-focused beauty formula is strongest for hair and nails, but modest collagen, keratin, and antioxidant amounts limit its structural depth.
How scoring works
Quantity:90 Capsule(s) • (45 servings)
Goals:
Hair Health
Nail Health
Skin Health

Score 70

A well-focused beauty formula is strongest for hair and nails, but modest collagen, keratin, and antioxidant amounts limit its structural depth.
How scoring works
$37.56($0.83 per serving)
iHerb
$ 37.56
Daily Vita
$ 37.56
Vitacost
$ 37.56
Amazon
$ 37.56
Report prices

Analysis

The formula is best aligned with hair and nail support because it combines concentrated biotin with soluble keratin, collagen peptides, MSM, zinc, and vitamin C. Those ingredients cover structural proteins, sulfur support, and cofactors used in collagen formation.

The collagen total is below the gram-level amounts expected from a dedicated collagen product, while keratin is also modest. Glutathione, CoQ10, and trans-resveratrol add breadth but are supplied in small amounts and ordinary capsule forms.

All major active amounts are clearly disclosed, making the strengths and gaps easy to assess. The main practical caution is the high biotin amount, which can distort several common blood tests and should be reported before laboratory work.

Who is it for
  • Adults seeking combined hair and nail nutrition
  • People who want high-dose biotin with structural cofactors
  • Users who prefer capsules over collagen powders
Best for
  • Hair and nail support
  • High-dose biotin supplementation
  • Broad beauty-nutrient coverage in one formula

Pros

  • High-dose biotin is clearly disclosed
  • Soluble keratin and collagen peptides provide structural ingredients
  • Zinc and vitamin C complement the protein-focused formula
  • No proprietary blend hides the major active amounts

Cons

  • Collagen is low for dedicated structural support
  • Keratin is modest despite its favorable soluble form
  • Glutathione, CoQ10, and resveratrol are small additions
  • Dry-capsule delivery gives CoQ10 no oil base

Warnings

  • Biotin at 5,000 mcg can distort thyroid, hormone, cardiac, and other laboratory test results; tell the testing professional before blood work

Nutrient quality

71 High impact

Favorable zinc, collagen, keratin, glutathione, and resveratrol forms support a coherent beauty formula. Several structural and antioxidant ingredients are too modestly dosed to provide strong depth.

.

Ingredient transparency

81 Highest impact

Every active has an individual amount and no proprietary blend hides key doses. Missing collagen source, extract purity, use directions, and capsule ingredients leave relevant disclosure gaps.

.

Customer satisfaction

69 High impact

The aggregate rating is strong and supported by a substantial feedback count. No complaint-level evidence was supplied to identify recurring issues or confirm hair, skin, and nail experiences.

.

Value for money

52 Moderate impact

Broad goal alignment and several favorable forms provide some formula value. A relatively costly serving and many modest specialty amounts reduce competitiveness.

.
Report analysis

Goals

Hair Health
Hair Health
Impact
Highest effect
A- Goal FitB+ Strength of SupportA- CoverageA Formula Quality
Biotin · 5000 mcgZinc · 10 mgVitamin C · 100 mgKeratin · 50 mgCollagen · 500 mg

High-dose biotin, collagen peptides, soluble keratin, MSM, zinc, and vitamin C create a highly relevant hair formula. Biotin is fully dosed, but collagen and keratin amounts are below those used for stronger primary structural support.

The active forms and amounts are clearly disclosed, and the combination covers structure, sulfur support, and mineral cofactors. The high biotin amount can interfere with some thyroid, hormone, and cardiac laboratory tests, so it should be reported before blood work.

Study evidence
Biotin Supportive 4 studies
Collagen Supportive 3 studies
Keratin Disputed 14 studies
Vitamin C Mixed 5 studies
Zinc Supportive 22 studies
Nail Health
Nail Health
Impact
Highest effect
A Goal FitB+ Strength of SupportA- CoverageA Formula Quality
Collagen · 500 mgBiotin · 5000 mcgKeratin · 50 mg

Concentrated biotin, hydrolyzed collagen peptides, soluble keratin, MSM, zinc, and vitamin C directly target nail growth, structural protein, sulfur supply, and collagen formation. Biotin is strongly dosed, while collagen and keratin are useful but below the amounts expected from dedicated structural supplements.

The formula is tightly focused and clearly discloses every major active in favorable forms. High-dose biotin can interfere with some thyroid, hormone, and cardiac blood tests, so use should be disclosed before laboratory testing.

Study evidence
Biotin Supportive 8 studies
Collagen Supportive 4 studies
Keratin Adverse 7 studies
Vitamin C Supportive 1 study
Zinc No effect 1 study
Skin Health
Skin Health
Impact
High effect
B+ Goal FitC+ Strength of SupportB- CoverageB+ Formula Quality
Zinc · 10 mgVitamin C · 100 mgCollagen · 500 mgResveratrol · 20 mg

Collagen peptides, vitamin C, zinc, MSM, keratin, and several antioxidants directly target skin structure and resilience. The disclosed 500 mg collagen amount is below commonly studied gram-level servings despite useful vitamin C and zinc support.

The formula covers structural proteins, collagen cofactors, and antioxidant defense. Broad coverage is limited by the low collagen amount and small glutathione, CoQ10, and resveratrol additions.

Study evidence
Collagen Supportive 62 studies
Resveratrol Supportive 7 studies
Vitamin C Supportive 53 studies
Zinc Supportive 66 studies

Ingredients

IngredientAmount per serving
Vitamin A (Vitamin A Palmitate)
 750 mcg
Vitamin C (L-Ascorbic Acid)
 100 mg
Biotin
5000 mcg
Zinc (Zinc Bisglycinate Chelate)
 10 mg
Collagen Peptides (Collagen Type I, Collagen Type III)
 500 mg
OptiMSM (Methylsulfonylmethane)
 500 mg
Cynatine HNS (Soluble Keratin)
 50 mg
Glutathione (L-Glutathione, Reduced)
 40 mg
Coenzyme Q-10 (Ubiquinone)
 25 mg
Trans-Resveratrol (Japanese Knotweed Root Extract)
 20 mg
Gluten Free Adults 18–50 Dairy Free Sugar Free
Report overview
Biotin · 5000 mcg OverallScore85
B+ Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyC Value

The concentrated biotin amount is well aligned with a focused hair, skin, and nail formula, and the exact dose is clearly disclosed. Vegetable capsules offer a clean delivery format, while collagen, MSM, keratin, zinc, and antioxidants provide relevant co-factors. The high biotin dose may interfere with certain laboratory tests, so users should tell the testing clinician about it before blood work.

View ingredientView products
Keratin (Soluble Keratin) · 50 mg OverallScore64
A+ Active Ingredient Quality & BioavailabilityD- Dose, Safety & Label TransparencyF Value

Branded Cynatine HNS provides a well-processed, soluble keratin form, but the amount is low for primary structural support. The exact dose is clearly disclosed, so the limitation is easy to assess. Value is weakened by the small keratin amount despite a serving cost near the category norm.

View ingredientView products
Coenzyme Q-10 (Ubiquinone) · 25 mg OverallScore42
D Active Ingredient Quality & BioavailabilityD Dose, Safety & Label TransparencyF Value

Ubiquinone is clearly identified, but dry capsules do not provide an oil base or absorption enhancer. The 25 mg amount is well below the stated effective range and requires two capsules. A high serving cost makes the CoQ10 value weak within this beauty-focused combination.

View ingredientView products
Loading alternative details
83 Performance

High Potency Maxi-Collagen 7000

Country Life
<p>The full gram-level blend of Type I and III collagen plus branded peptides provides far stronger structural protein support than the original. Vitamin C and moderate biotin complement the collagen without relying on many lightly dosed specialty ingredients.</p>
75 Performance

Hair Collagen + Keratin

youtheory
<p>Hydrolyzed collagen and keratin are supplied at substantially more meaningful amounts for hair and nails. High biotin still creates laboratory-test interference risk, and the large tablet serving reduces convenience.</p>
81 Performance

RegenerLife Watermelon

Natural Factors
<p>The much larger CoQ10 and branded glutathione amounts provide stronger cellular-energy and antioxidant support than the original's modest doses. It contains no collagen, keratin, zinc, or biotin, so it is better only for those secondary antioxidant ingredients rather than the main beauty goal.</p>
58 Budget

Alive! Hair Skin & Nails Gummies Delicious Strawberry Flavored

Nature's Way
<p>The lower-cost gummy retains biotin and vitamin C for hair, skin, and nail support. Its collagen and fruit-and-vegetable blend are token additions, and high biotin can interfere with some laboratory tests.</p>
73 Budget

Collagen 1500 + C

Mason Natural
<p>The lower serving cost provides more disclosed hydrolyzed bovine collagen with vitamin C and biotin. It omits keratin, MSM, glutathione, CoQ10, and resveratrol, while high biotin can still affect some laboratory tests.</p>
73 Budget

Undeniable Beauty Grapefruit Glam

OLLY
<p>The cheaper formula preserves high biotin with vitamin C, natural-form vitamin E, and the same modest keratin amount. It drops collagen and most specialty antioxidants, and its high biotin can distort certain thyroid, hormone, and cardiac test results.</p>
77 Value

Hair Ultra Softgels

OLLY
<p>The lower-cost formula gives a focused hair-and-nail profile with keratin, biotin, vitamin D3, zinc, and silicon at disclosed doses. Keratin and silicon remain modest, and the high biotin amount may interfere with laboratory tests.</p>
75 Value

Collagen

youtheory men
<p>The economical serving supplies substantially more hydrolyzed collagen with vitamin C and biotin. Added fo-ti has been linked to liver injury, which weakens suitability despite the stronger collagen value.</p>
80 Value

Heart Collagen + Resveratrol

youtheory
<p>The similar serving cost provides more collagen and far more pure trans-resveratrol in a simple disclosed blend. It omits biotin, keratin, zinc, and vitamin C, while vitamin K2 can oppose warfarin-type medicines.</p>
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 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. The Effects of an Oral Supplementation of a Natural Keratin Hydrolysate on Skin Aging: A Randomized, Double-Blind, Placebo-Controlled Clinical Study in Healthy Women.
    Tursi F; Nobile V; Cestone E; De Ponti I; Lepoudere A; Sergheraert R; Soulard JP · Journal of cosmetic dermatology · 2025
    Randomized trialHair Health Nail Health forKeratin
  14. Halloysite/Keratin Nanocomposite for Human Hair Photoprotection Coating.
    Cavallaro G; Milioto S; Konnova S; Fakhrullina G; Akhatova F; Lazzara G; Fakhrullin R; Lvov Y · ACS applied materials & interfaces · 2021
    In vitro / ex vivo studyHair Health forKeratin
  15. A variable monilethrix phenotype associated with a novel mutation, Glu402Lys, in the helix termination motif of the type II hair keratin hHb1.
    Winter H; Labrèze C; Chapalain V; Surlève-Bazeille JE; Mercier M; Rogers MA; Taieb A; Schweizer J · The Journal of investigative dermatology · 1998
    Case series3 participantsHair Health forKeratin
  16. 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
  17. 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
  18. Brittle nails: response to daily biotin supplementation.
    Hochman LG; Scher RK; Meyerson MS · Cutis · 1993
    Case series35 participantsNail Health forBiotin
  19. Comparative Analysis of Type I Keratin Expression By Nail Consistency: An Immunohistochemistry Study.
    Mingorance Álvarez E; Rodríguez-León J; Pérez Pico AM; Mayordomo R · Applied immunohistochemistry & molecular morphology : AIMM · 2022
    Cross-sectional study32 participantsNail Health forKeratin
  20. Exposure to toxic agents alters organic elemental composition in human fingernails.
    Schumacher E; Dindorf W; Dittmar M · The Science of the total environment · 2009
    Cross-sectional study120 participantsNail Health forKeratin
  21. 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 forBiotin
  22. Annurca Apple Nutraceutical Formulation Enhances Keratin Expression in a Human Model of Skin and Promotes Hair Growth and Tropism in a Randomized Clinical Trial.
    Tenore GC; Caruso D; Buonomo G; D'Avino M; Santamaria R; Irace C; Piccolo M; Maisto M; Novellino E · Journal of medicinal food · 2018
    Randomized trialHair Health forKeratin
  23. Keratin/alginate hybrid hydrogels filled with halloysite clay nanotubes for protective treatment of human hair.
    Cavallaro G; Caruso MR; Milioto S; Fakhrullin R; Lazzara G · International journal of biological macromolecules · 2022
    In vitro / ex vivo studyHair Health forKeratin
  24. Patient Satisfaction and Adverse Effects Following the use of Topical Hair Fiber Fillers.
    Babadjouni A; Juhasz M; Pham C; Csuka E; Hedayati B; Evron E; Mesinkovska NA · International journal of trichology · 2024
    Cross-sectional study40 participantsHair Health forKeratin
  25. 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
  26. 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
  27. 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
  28. 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
  29. 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
  30. The effects of minoxidil, 1% pyrithione zinc and a combination of both on hair density: a randomized controlled trial.
    Berger RS; Fu JL; Smiles KA; Turner CB; Schnell BM; Werchowski KM; Lammers KM · The British journal of dermatology · 2003
    Randomized trial200 participantsHair Health forZinc
  31. Incubatory environment of the scalp impacts pre-emergent hair to affect post-emergent hair cuticle integrity.
    Schwartz JR; Henry JP; Kerr KM; Flagler MJ; Page SH; Redman-Furey N · Journal of cosmetic dermatology · 2018
    Randomized trialHair Health forZinc
  32. A comparison of hair quality and cosmetic acceptance following the use of two anti-dandruff shampoos.
    Draelos ZD; Kenneally DC; Hodges LT; Billhimer W; Copas M; Margraf C · The journal of investigative dermatology. Symposium proceedings · 2006
    Randomized trial40 participantsHair Health forZinc
  33. BMI and levels of zinc, copper in hair, serum and urine of Turkish male patients with androgenetic alopecia.
    Ozturk P; Kurutas E; Ataseven A; Dokur N; Gumusalan Y; Gorur A; Tamer L; Inaloz S · Journal of trace elements in medicine and biology : organ of the Society for Minerals and Trace Elements (GMS) · 2015
    Case-control study216 participantsHair Health forZinc
  34. Analysis of serum zinc and copper concentrations in hair loss.
    Kil MS; Kim CW; Kim SS · Annals of dermatology · 2013
    Case-control study342 participantsHair Health forZinc
  35. 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
  36. 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 Nail Health forZinc
  37. 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
  38. 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
  39. Nail Supplements: When, How, and Why?
    Zaraa I; Richert B · Skin appendage disorders · 2026
    Narrative reviewNail Health forCollagen
  40. 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
  41. Human keratin diseases: hereditary fragility of specific epithelial tissues.
    Corden LD; McLean WH · Experimental dermatology · 1997
    Narrative reviewNail Health forKeratin
  42. Phenotype and genotype features of Vietnamese children with pachyonychia congenita.
    Chu HT; Dinh Duong TA; Le DH; Le TV; Nguyen BB; Dang CV; Vu QV · Pediatrics and neonatology · 2023
    Case series7 participantsNail Health forKeratin
  43. 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
  44. 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 participantsSkin Health forCollagen
  45. 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
  46. 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 pooledSkin Health forCollagen
  47. Efficacy and safety of Resveratrol combined with Ablative Fractional CO2 laser system in the treatment of skin photoaging.
    Du YM; Zeng J; Li M; Wang YB; Wu Y; Qi RQ; Gao XH; Chen HD · Journal of cosmetic dermatology · 2021
    Non-randomized trial32 participantsSkin Health forResveratrol
  48. Exploring resveratrol-enriched collagen dressings for diabetic foot ulcers: A retrospective study of wound healing outcomes.
    Sezikli İ; Kendirci M · Journal of tissue viability · 2025
    Cohort study41 participantsSkin Health forResveratrol
  49. Enhanced antioxidant effect of trans-resveratrol: potential of binary systems with polyethylene glycol and cyclodextrin.
    Moyano-Mendez JR; Fabbrocini G; De Stefano D; Mazzella C; Mayol L; Scognamiglio I; Carnuccio R; Ayala F; La Rotonda MI; De Rosa G · Drug development and industrial pharmacy · 2016
    Clinical trialSkin Health forResveratrol
  50. Trans-resveratrol reduces visible signs of skin ageing in healthy adult females over 40: an 8-week randomized placebo-controlled trial.
    Rao A; Briskey D; Roche G; Tremblay A; Da Silva Pinto M; Tompkins TA · Frontiers in aging · 2026
    Randomized trial134 participantsSkin Health forResveratrol
  51. Resveratrol-Loaded Lipid Nanocarriers: Correlation between In Vitro Occlusion Factor and In Vivo Skin Hydrating Effect.
    Montenegro L; Parenti C; Turnaturi R; Pasquinucci L · Pharmaceutics · 2020
    Clinical trial12 participantsSkin Health forResveratrol
  52. 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
  53. 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
  54. 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
  55. 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
  56. 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
  57. Sex-related differences in response to zinc pyrithione shampoo vs. non-anti-dandruff shampoo.
    Collins LZ; Baines FL; Matheson JR; Turner GA; Diao Y; Li Y; Pi Y · International journal of cosmetic science · 2019
    Meta-analysis2,088 participants20 studies pooledSkin Health forZinc
  58. Maintenance of an Acidic Skin Surface with a Novel Zinc Lactobionate Emollient Preparation Improves Skin Barrier Function in Patients with Atopic Dermatitis.
    Andrew PV; Pinnock A; Poyner A; Brown K; Chittock J; Kay LJ; Cork MJ; Danby SG · Dermatology and therapy · 2024
    Cohort study23 participantsSkin Health forZinc
  59. Spatial expression of metallothionein, matrix metalloproteinase-1 and Ki-67 in human epidermal wounds treated with zinc and determined by quantitative immunohistochemistry: A randomised double-blind trial.
    Ågren MS; Chafranska L; Eriksen JO; Forman JL; Bjerrum MJ; Schjerling P; Larsen HF; Cottarelli E; Jorgensen LN; Gjerdrum LMR · European journal of cell biology · 2021
    Randomized trial30 participantsSkin Health forZinc
  60. A pilot trial using topical regular crystalline insulin vs. aqueous zinc solution for uncomplicated cutaneous wound healing: Impact on quality of life.
    Attia EA; Belal DM; El Samahy MH; El Hamamsy MH · Wound repair and regeneration : official publication of the Wound Healing Society [and] the European Tissue Repair Society · 2014
    Randomized trial90 participantsSkin Health forZinc
  61. Evidence-Based Nutritional Interventions in Wound Care.
    Saeg F; Orazi R; Bowers GM; Janis JE · Plastic and reconstructive surgery · 2021
    Systematic review2,339 participants36 studies pooledSkin Health forZinc