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Green Tea Extract 400 mg

NOW
4.7
★ ★ ★ ★ ★
(10181 ratings)
Green Tea 400 mg
Product Image
Score78
A low-cost green tea capsule includes vitamin C but omits the EGCG and caffeine details needed to judge strength.
How scoring works
Quantity:100 Capsule(s) • (100 servings)
Goals:
Skin Health
Metabolism Boost
Anti-Inflammatory Support
Anti-Aging

Score 78

A low-cost green tea capsule includes vitamin C but omits the EGCG and caffeine details needed to judge strength.
How scoring works

Also available as

1 option
250 servings Green Tea 400 mg • 250 Capsule(s) • 250 servings $16.20 ($0.06 per serving)
$7.60($0.07 per serving)
iHerb
$ 7.95
Pure Formulas
$ 7.73
Vitacost
$ 8.55
Daily Vita
$ 7.60
Amazon
$ 7.95
Report prices

Analysis

The capsule lists 400 mg of green tea extract associated with catechins, plus 60 mg of vitamin C. Green tea polyphenols may support antioxidant and inflammatory balance, but no specific outcome can be inferred without marker yields.

Vitamin C complements the antioxidant theme and the one-capsule serving is convenient. No EGCG percentage or absorption-enhancing delivery system is disclosed.

It suits users comfortable with an unquantified catechin profile and unknown caffeine exposure. Anyone comparing products by EGCG dose receives too little information despite the low cost.

Who is it for
  • Adults seeking a basic green tea extract
  • Value-focused antioxidant users
  • People comfortable with unknown caffeine
Best for
  • Simple daily green tea use
  • Antioxidant support
  • One-capsule convenience

Pros

  • Provides 400 mg green tea extract
  • Includes 60 mg vitamin C
  • Identifies catechins
  • Low serving cost

Cons

  • EGCG amount is not stated
  • Caffeine amount is not usable
  • No marker percentage is supplied
  • No enhanced absorption delivery

Warnings

  • Concentrated green tea extract may cause nausea or stomach discomfort, especially when taken without food.
  • Green tea catechins can reduce iron absorption; separate the capsule from iron supplements or iron-rich meals when iron status is a concern.
  • Caffeine content is not stated, so stimulant-sensitive users should avoid taking it late in the day.

Nutrient quality

83 Highest impact

The extract identifies catechins and includes vitamin C, but active-marker percentages remain unclear. The total amount is substantial without an obvious extreme disclosed dose.

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Ingredient transparency

69 High impact

The extract amount is shown, but repeated caffeine and catechin entries do not provide usable component yields. Directions, capsule ingredients, and standardization percentages are missing.

.

Customer satisfaction

72 High impact

The supplied aggregate rating indicates strong customer satisfaction. Specific comments are unavailable, so complaint patterns and intended-use fit cannot be verified.

.

Value for money

92 Highest impact

A substantial extract and very low serving cost create strong price value. Missing EGCG and caffeine yields limit quality comparison.

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Report analysis

Goals

Skin Health
Skin Health
Impact
High effect
B Goal FitC Strength of SupportC+ CoverageA Formula Quality
Vitamin C · 60 mgGreen Tea · 400 mg

Green tea extract and vitamin C combine antioxidant defense with collagen-cofactor support. The extract amount is substantial, but EGCG, catechin percentage, and usable caffeine content are not disclosed.

The formula covers two relevant pathways without direct hydration or barrier-lipid ingredients. Its low marker transparency makes the strength of the green-tea contribution uncertain.

Study evidence
Green Tea Supportive 37 studies
Vitamin C Supportive 53 studies
Metabolism Boost
Metabolism Boost
Impact
High effect
A- Goal FitD Strength of SupportC- CoverageA- Formula Quality
Green Tea · 400 mg

Green tea catechins and caffeine can support thermogenesis and fat oxidation, giving the extract direct metabolic relevance. Human evidence is meaningful when EGCG and caffeine exposure is known.

The total extract amount is substantial, but the label does not provide usable EGCG or caffeine yields. Concentrated green tea extract can cause nausea and has been linked to liver injury in susceptible users, especially when taken on an empty stomach.

Study evidence
Green Tea Supportive 31 studies
Anti-Inflammatory Support
Anti-Inflammatory Support
Impact
High effect
B+ Goal FitD+ Strength of SupportD+ CoverageB+ Formula Quality
Vitamin C · 60 mgGreen Tea · 400 mg

Green-tea catechins can modulate inflammatory and oxidative signaling. Human evidence supports green tea as an antioxidant intervention, though effects vary with EGCG exposure and extract quality.

The 400 mg extract amount may be meaningful, but the actual catechin, EGCG, and caffeine yields are not clear. Vitamin C and total extract amounts are disclosed, while active-marker percentages and caffeine yield are absent. Concentrated green-tea extract can cause nausea and has been linked to liver injury in susceptible users, especially when taken on an empty stomach.

Study evidence
Green Tea Mixed 16 studies
Vitamin C Supportive 50 studies
Anti-Aging
Anti-Aging
Impact
High effect
C Goal FitC Strength of SupportC- CoverageB+ Formula Quality
Green Tea · 400 mg

Green-tea catechins support antioxidant and metabolic pathways that may contribute to healthy aging, while vitamin C adds general antioxidant support. Human evidence is relevant for cardiometabolic markers but does not establish broad lifespan effects.

The supplied label data does not clearly separate total extract, catechin, EGCG, and caffeine amounts, which limits dose and safety assessment. Unclear caffeine exposure may cause anxiety or sleep disruption, and concentrated green-tea extracts have a rare liver-injury risk that is greater when taken fasting.

Study evidence
Green Tea Supportive 9 studies
Vitamin C Supportive 30 studies
Cognitive Support
Cognitive Support
Impact
Moderate effect
C- Goal FitF Strength of SupportF CoverageB- Formula Quality
Green Tea · 400 mg

Green tea catechins and caffeine may support alertness and antioxidant protection, but the label does not quantify either active fraction clearly. Vitamin C adds antioxidant support without creating a strong memory or attention formula.

The extract amount is disclosed, yet missing EGCG standardization and usable caffeine content prevent reliable dose assessment. Unquantified caffeine may still cause jitteriness, palpitations, or sleep disruption in sensitive users.

Study evidence
Green Tea Supportive 32 studies

Ingredients

IngredientAmount per serving
Vitamin C (Ascorbic Acid)
 60 mg
Green Tea extract (Caffeine, Catechins)
 400 mg
Gluten Free Adults 18–50 Vegan Kosher Dairy Free Vegetarian
Report overview
Green Tea (Caffeine, Catechins) · 400 mg OverallScore18
F Active Ingredient Quality & BioavailabilityF Dose, Safety & Label TransparencyF Value

The extract discloses catechins and includes vitamin C, but it does not provide an EGCG amount or standardization percentage. Caffeine is acknowledged without a usable stimulant amount. The low serving cost cannot be converted into verified EGCG value.

View ingredientView products
Loading alternative details
84 Performance

EGCg Green Tea Extract 400 mg

NOW
<p>Compared with the original, it keeps the green-tea focus and retains relevant support for anti-aging and skin health. A potent, decaffeinated EGCG dose provides focused antioxidant and metabolic support with very good long-term value. Concentrated green tea extract can stress the liver in susceptible people, especially when taken fasting, so use with food and avoid it with liver disease.</p>
84 Performance

Green Tea Extract 500 mg

Source Naturals
<p>Compared with the original, it keeps the green-tea focus and retains relevant support for anti-aging and skin health. A substantial green tea extract amount provides focused botanical support. Value is favorable after considering dose quality and formula focus.</p>
80 Performance

Green Tea

Jarrow Formulas
<p>Compared with the original, it keeps the green-tea focus and retains relevant support for anti-aging and skin health. A concentrated green-tea extract identifies catechins, polyphenols, and EGCG, supporting substantial antioxidant exposure. A high-EGCG extract may cause nausea or rare liver injury, particularly when taken fasting.</p>
84 Budget

EGCg Green Tea Extract 400 mg

NOW
<p>The supplied data does not show a lower recurring cost than the original, though it remains an eligible green-tea alternative. A potent, decaffeinated EGCG dose provides focused antioxidant and metabolic support at very good value. Concentrated green tea extract can stress the liver in susceptible people, especially when taken fasting, so use with food and avoid it with liver disease.</p>
84 Budget

EGCg Green Tea Extract

Protocol For Life Balance
<p>The supplied data does not show a lower recurring cost than the original, though it remains an eligible green-tea alternative. A decaffeinated green-tea extract clearly identifies a substantial EGCG and catechin profile. A high-EGCG extract may cause nausea or rare liver injury, particularly when taken fasting.</p>
79 Budget

Decaffeinated Mega Green Tea Extract

Life Extension
<p>The supplied data does not show a lower recurring cost than the original, though it remains an eligible green-tea alternative. Clear decaffeination and a measured EGCG amount make the active profile easy to understand. The 725 mg dose remains unusually high and may stress the liver, especially when taken fasting or used by someone with liver disease.</p>
76 Value

Mega Green Tea Extract

Life Extension
<p>It matches the original green-tea collection, but the supplied cost data does not establish a cheaper serving. A highly concentrated EGCG dose offers low active cost but exceeds the preferred routine range. High-dose green tea extract can stress the liver, especially when taken fasting, so avoid it with liver disease and use only with appropriate supervision.</p>
77 Value

Green Tea Extract

ZHOU
<p>It matches the original green-tea collection, but the supplied cost data does not establish a cheaper serving. A concentrated green-tea extract identifies catechins, polyphenols, and EGCG, supporting substantial antioxidant exposure. A high-EGCG extract may cause nausea or rare liver injury, particularly when taken fasting.</p>
73 Value

Green Tea

Paradise
<p>It matches the original green-tea collection, but the supplied cost data does not establish a cheaper serving. A straightforward green-tea extract provides a moderate total amount at low serving cost. Undisclosed caffeine may cause jitteriness or sleep disruption in sensitive users.</p>
Report alternatives

Sources

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

  1. Effects of green tea supplementation on antioxidant status and inflammatory markers in adults: a grade-assessed systematic review and dose-response meta-analysis of randomised controlled trials.
    Dehzad MJ; Ghalandari H; Nouri M; Makhtoomi M; Askarpour M · Journal of nutritional science · 2025
    Meta-analysis38 studies pooledAnti-Inflammatory Support forGreen Tea
  2. Effects of supplementation with green tea catechins on plasma C-reactive protein concentrations: A systematic review and meta-analysis of randomized controlled trials.
    Serban C; Sahebkar A; Antal D; Ursoniu S; Banach M · Nutrition (Burbank, Los Angeles County, Calif.) · 2016
    Meta-analysis11 studies pooledAnti-Inflammatory Support forGreen Tea
  3. The effects of green tea on acne vulgaris: A systematic review and meta-analysis of randomized clinical trials.
    Kim S; Park TH; Kim WI; Park S; Kim JH; Cho MK · Phytotherapy research : PTR · 2021
    Meta-analysis247 participants5 studies pooledAnti-Inflammatory Support forGreen Tea
  4. Green Tea Catechin Association with Ultraviolet Radiation-Induced Erythema: A Systematic Review and Meta-Analysis.
    Kapoor MP; Sugita M; Fukuzawa Y; Timm D; Ozeki M; Okubo T · Molecules (Basel, Switzerland) · 2021
    Meta-analysis100 participants6 studies pooledAnti-Inflammatory Support Skin Health forGreen Tea
  5. Effects of Green Tea Extract Supplementation on Inflammatory Cytokines Among Postmenopausal Women with Overweight or Obesity-A Secondary Analysis of a Randomized Controlled Trial.
    Cunningham A; Gomes A; Meng L; Shapses S; Byham-Gray L; Samavat H · Nutrients · 2026
    Randomized trial97 participantsAnti-Inflammatory Support forGreen Tea
  6. Effect of Green Tea Supplementation on Inflammatory Markers among Patients with Metabolic Syndrome and Related Disorders: A Systematic Review and Meta-Analysis.
    de Oliveira Assis FS; Vasconcellos GL; Lopes DJP; de Macedo LR; Silva M · Preventive nutrition and food science · 2024
    Meta-analysis15 studies pooledAnti-Inflammatory Support forGreen Tea
  7. A green tea extract confection decreases circulating endotoxin and fasting glucose by improving gut barrier function but without affecting systemic inflammation: A double-blind, placebo-controlled randomized trial in healthy adults and adults with metabolic syndrome.
    Zeng M; Hodges JK; Pokala A; Khalafi M; Sasaki GY; Pierson J; Cao S; Brock G; Yu Z; Zhu J; Vodovotz Y; Bruno RS · Nutrition research (New York, N.Y.) · 2024
    Randomized trial40 participantsAnti-Inflammatory Support forGreen Tea
  8. Efficacy of (-)-epigallocatechin gallate delivered by a new-type scaler tip during scaling and root planing on chronic periodontitis: a split-mouth, randomized clinical trial.
    Wang Y; Zeng J; Yuan Q; Luan Q · BMC oral health · 2021
    Randomized trial20 participantsAnti-Inflammatory Support forGreen Tea
  9. Functional foods modulating inflammation and metabolism in chronic diseases: a systematic review.
    Luvián-Morales J; Varela-Castillo FO; Flores-Cisneros L; Cetina-Pérez L; Castro-Eguiluz D · Critical reviews in food science and nutrition · 2022
    Systematic review88 studies pooledAnti-Inflammatory Support forGreen Tea
  10. Does green tea extract enhance the anti-inflammatory effects of exercise on fat loss?
    Bagheri R; Rashidlamir A; Ashtary-Larky D; Wong A; Alipour M; Motevalli MS; Chebbi A; Laher I; Zouhal H · British journal of clinical pharmacology · 2021
    Randomized trial30 participantsAnti-Inflammatory Support forGreen Tea
  11. Green tea and coffee intake and risk of cognitive decline in older adults: the National Institute for Longevity Sciences, Longitudinal Study of Aging.
    Shirai Y; Kuriki K; Otsuka R; Kato Y; Nishita Y; Tange C; Tomida M; Imai T; Ando F; Shimokata H · Public health nutrition · 2021
    Cohort study1,305 participantsAnti-Aging forGreen Tea
  12. Associations of green tea, coffee, and soft drink consumption with longitudinal changes in leukocyte telomere length.
    Sohn I; Shin C; Baik I · Scientific reports · 2023
    Cohort study1,952 participantsAnti-Aging forGreen Tea
  13. Can teatime increase one's lifetime?
    Nakachi K; Eguchi H; Imai K · Ageing research reviews · 2003
    Cohort studyAnti-Aging forGreen Tea
  14. Influences of tea consumption on self-rated health and life satisfaction among older adults: Evidence from the CLHLS.
    Zou M; Sun C; Yang M; Li C; Wang S; Zheng D; Wang J; Yu L; Sun L; Wang Y; Chen H; Zeng Y · PsyCh journal · 2025
    Cohort study78,345 participantsAnti-Aging forGreen Tea
  15. Double-blinded, placebo-controlled trial of green tea extracts in the clinical and histologic appearance of photoaging skin.
    Chiu AE; Chan JL; Kern DG; Kohler S; Rehmus WE; Kimball AB · Dermatologic surgery : official publication for American Society for Dermatologic Surgery [et al.] · 2005
    Randomized trial40 participantsAnti-Aging forGreen Tea
  16. 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
  17. 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
  18. 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
  19. 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
  20. 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
  21. Camellia Sinensis Mouthwashes in Oral Care: a Systematic Review.
    Tafazoli A; Tafazoli Moghadam E · Journal of dentistry (Shiraz, Iran) · 2020
    Systematic review69 studies pooledAnti-Inflammatory Support forGreen Tea
  22. Skin photoprotection by green tea: antioxidant and immunomodulatory effects.
    Katiyar SK · Current drug targets. Immune, endocrine and metabolic disorders · 2004
    Narrative reviewAnti-Inflammatory Support forGreen Tea
  23. 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
  24. 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
  25. 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
  26. 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
  27. 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
  28. Safety and efficacy of cognitive training plus epigallocatechin-3-gallate in young adults with Down's syndrome (TESDAD): a double-blind, randomised, placebo-controlled, phase 2 trial.
    de la Torre R; de Sola S; Hernandez G; Farré M; Pujol J; Rodriguez J; Espadaler JM; Langohr K; Cuenca-Royo A; Principe A; Xicota L; Janel N; Catuara-Solarz S; Sanchez-Benavides G; Bléhaut H; Dueñas-Espín I; Del Hoyo L; Benejam B; Blanco-Hinojo L; Videla S; Fitó M; Delabar JM; Dierssen M; TESDAD study group · The Lancet. Neurology · 2017
    Randomized trial87 participantsCognitive Support forGreen Tea
  29. Association between tea consumption and risk of cognitive disorders: A dose-response meta-analysis of observational studies.
    Liu X; Du X; Han G; Gao W · Oncotarget · 2018
    Meta-analysis48,435 participants17 studies pooledCognitive Support forGreen Tea
  30. Investigating the Impact of Tea Consumption on Cognitive Function and Exploring Tea-Genetic Interactions in Older Adults Aged 65-105 Years: Findings from the 2002-2018 CLHLS Data.
    Yu L; Yang M; Ye KX; Li C; Zou M; Wang J; Yuan X; Zheng D; Sun C; Zhang Y; Feng Q; Maier AB; Sun L; Feng L; Wang Y; Chen H; Zeng Y · The journal of prevention of Alzheimer's disease · 2024
    Cohort study76,270 participantsCognitive Support forGreen Tea
  31. Consumption of green tea, but not black tea or coffee, is associated with reduced risk of cognitive decline.
    Noguchi-Shinohara M; Yuki S; Dohmoto C; Ikeda Y; Samuraki M; Iwasa K; Yokogawa M; Asai K; Komai K; Nakamura H; Yamada M · PloS one · 2014
    Cohort study490 participantsCognitive Support forGreen Tea
  32. Green Tea Consumption and the Risk of Incident Dementia in Elderly Japanese: The Ohsaki Cohort 2006 Study.
    Tomata Y; Sugiyama K; Kaiho Y; Honkura K; Watanabe T; Zhang S; Sugawara Y; Tsuji I · The American journal of geriatric psychiatry : official journal of the American Association for Geriatric Psychiatry · 2018
    Cohort study13,645 participantsCognitive Support forGreen Tea
  33. Effect of green tea on glucose control and insulin sensitivity: a meta-analysis of 17 randomized controlled trials.
    Liu K; Zhou R; Wang B; Chen K; Shi LY; Zhu JD; Mi MT · The American journal of clinical nutrition · 2013
    Meta-analysis1,133 participants17 studies pooledMetabolism Boost forGreen Tea
  34. Green tea extract ingestion, fat oxidation, and glucose tolerance in healthy humans.
    Venables MC; Hulston CJ; Cox HR; Jeukendrup AE · The American journal of clinical nutrition · 2008
    Randomized trial23 participantsMetabolism Boost forGreen Tea
  35. Efficacy of a green tea extract rich in catechin polyphenols and caffeine in increasing 24-h energy expenditure and fat oxidation in humans.
    Dulloo AG; Duret C; Rohrer D; Girardier L; Mensi N; Fathi M; Chantre P; Vandermander J · The American journal of clinical nutrition · 1999
    Randomized trial10 participantsMetabolism Boost forGreen Tea
  36. A 60-Day Green Tea Extract Supplementation Counteracts the Dysfunction of Adipose Tissue in Overweight Post-Menopausal and Class I Obese Women.
    Rondanelli M; Gasparri C; Perna S; Petrangolini G; Allegrini P; Fazia T; Bernardinelli L; Cavioni A; Mansueto F; Oberto L; Patelli Z; Tartara A; Riva A · Nutrients · 2022
    Randomized trial28 participantsMetabolism Boost forGreen Tea
  37. Epigallocatechin gallate alleviates non-alcoholic fatty liver disease through the inhibition of the expression and activity of Dipeptide kinase 4.
    Yang M; Yan R; Sha R; Wang X; Zhou S; Li B; Zheng Q; Cao Y · Clinical nutrition (Edinburgh, Scotland) · 2024
    Randomized trialMetabolism Boost forGreen Tea
  38. Topical Polyphenon E in the treatment of external genital and perianal warts: a randomized controlled trial.
    Stockfleth E; Beti H; Orasan R; Grigorian F; Mescheder A; Tawfik H; Thielert C · The British journal of dermatology · 2008
    Randomized trial503 participantsSkin Health forGreen Tea
  39. Efficacy, safety and tolerability of green tea catechins in the treatment of external anogenital warts: a systematic review and meta-analysis.
    Tzellos TG; Sardeli C; Lallas A; Papazisis G; Chourdakis M; Kouvelas D · Journal of the European Academy of Dermatology and Venereology : JEADV · 2011
    Meta-analysis1,247 participants3 studies pooledSkin Health forGreen Tea
  40. Green tea polyphenols provide photoprotection, increase microcirculation, and modulate skin properties of women.
    Heinrich U; Moore CE; De Spirt S; Tronnier H; Stahl W · The Journal of nutrition · 2011
    Randomized trial60 participantsSkin Health forGreen Tea
  41. Efficacy of Epigallocatechin-3-Gallate in Preventing Dermatitis in Patients With Breast Cancer Receiving Postoperative Radiotherapy: A Double-Blind, Placebo-Controlled, Phase 2 Randomized Clinical Trial.
    Zhao H; Zhu W; Zhao X; Li X; Zhou Z; Zheng M; Meng X; Kong L; Zhang S; He D; Xing L; Yu J · JAMA dermatology · 2022
    Randomized trial180 participantsSkin Health forGreen Tea
  42. 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
  43. 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
  44. 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
  45. 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
  46. 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