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Green Tea Extract

ZHOU
4.3
★ ★ ★ ★ ★
(4227 ratings)
Green Tea 500 mg
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Score77
A potent, inexpensive green tea capsule has promising marker disclosure, but repeated amounts and unknown caffeine need label verification.
How scoring works
Quantity:120 Capsule(s) • (120 servings)
Goals:
Metabolism Boost
Anti-Inflammatory Support
Anti-Aging
Heart Health
Skin Health
Cognitive Support

Score 77

A potent, inexpensive green tea capsule has promising marker disclosure, but repeated amounts and unknown caffeine need label verification.
How scoring works
$23.09($0.19 per serving)
iHerb
$ 23.09
Amazon
$ 23.09
Vitacost
$ 23.09
Report prices

Analysis

The supplied label maps 500 mg to green tea extract, catechins, EGCG, and polyphenols. That presentation suggests high concentration but should not be read as four separate 500 mg additions.

The capsule is focused and inexpensive for a potentially substantial active amount. No caffeine quantity, standardized percentage, or phospholipid delivery is shown.

It fits experienced green tea extract users who can verify the current label and take it with food. Dose ambiguity makes it less suitable for someone trying to manage EGCG precisely.

Who is it for
  • Experienced green tea extract users
  • Adults seeking a concentrated catechin product
  • People willing to verify the marker panel
Best for
  • High-potency green tea supplementation
  • Antioxidant and metabolic support
  • Low-cost concentrated use

Pros

  • Identifies EGCG
  • Lists catechins and polyphenols
  • Focused single-extract formula
  • Strong value for a concentrated product

Cons

  • Repeated 500 mg entries are ambiguous
  • Caffeine is not disclosed
  • No absorption-enhancing delivery
  • High concentration may reduce tolerance

Warnings

  • If 500 mg is the EGCG amount, it is a high-strength serving that should be taken with food rather than fasting.
  • Verify the current label before use because the repeated 500 mg marker entries may describe one extract rather than additive amounts.
  • Caffeine is not stated, so stimulant-sensitive users should avoid late-day use.
  • Green tea catechins can reduce iron absorption; separate from iron supplements when iron status is a concern.

Nutrient quality

84 Highest impact

The extract identifies relevant active-marker groups and appears highly concentrated. Potentially high EGCG exposure and ambiguous component yields reduce dose confidence.

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Ingredient transparency

73 High impact

Relevant marker groups are named, but repeated full-amount entries do not clearly state their percentages or yields. Caffeine, directions, and inactive ingredients are missing.

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Customer satisfaction

66 High impact

The supplied aggregate rating is mixed. Specific comments are unavailable, so complaint patterns and intended-use fit cannot be verified.

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Value for money

83 Highest impact

A concentrated extract and modest serving cost support good active value. Ambiguous marker yields and weak aggregate satisfaction temper the advantage.

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Report analysis

Goals

Metabolism Boost
Metabolism Boost
Impact
Highest effect
A- Goal FitB+ Strength of SupportC+ CoverageA+ Formula Quality
Green Tea · 500 mg

A highly concentrated green tea extract directly targets thermogenesis and fat oxidation through EGCG and related catechins. Human evidence supports modest metabolic effects, though results depend on caffeine exposure and individual response.

The extract identifies catechins, EGCG, and polyphenols, but caffeine content and absorption support are not disclosed. The high EGCG exposure may cause nausea and has rarely been linked with liver injury, particularly when concentrated green tea extract is taken on an empty stomach.

Study evidence
Green Tea Supportive 31 studies
Anti-Inflammatory Support
Anti-Inflammatory Support
Impact
High effect
B+ Goal FitB+ Strength of SupportC- CoverageA Formula Quality
Green Tea · 500 mg

A highly concentrated green tea extract provides direct antioxidant and inflammatory-signaling support through EGCG and other polyphenols. The single-active design offers strong depth but does not cover the broader range of mechanisms found in combination formulas.

Active constituents are clearly identified, and the EGCG amount appears potent while remaining below the supplied high-dose safety threshold. Caffeine content and advanced absorption support are not disclosed, which leaves tolerance and delivery less certain.

Study evidence
Green Tea Mixed 16 studies
Anti-Aging
Anti-Aging
Impact
High effect
B- Goal FitB- Strength of SupportB- CoverageA Formula Quality
Green Tea · 500 mg

Highly concentrated green tea polyphenols target oxidative stress and metabolic signaling linked with healthy aging. The EGCG amount is above the preferred range, while caffeine content is not disclosed.

The standardized extract is clear, but the capsule has no absorption support. Concentrated EGCG may cause nausea or liver-enzyme elevations when taken fasting, so it is better taken with food and stopped if liver-related symptoms appear.

Study evidence
Green Tea Supportive 9 studies
Heart Health
Heart Health
Impact
High effect
B- Goal FitB- Strength of SupportC- CoverageA Formula Quality
Green Tea · 500 mg

Green tea catechins may support endothelial function and antioxidant protection, but they do not cover the main lipid, cardiac-energy, or mineral pathways. The formula is a focused botanical rather than a broad cardiovascular product.

The concentrated extract amount and EGCG content are clearly disclosed, though the amount is higher than many routine servings. Concentrated green tea extract may irritate the liver in susceptible users, especially when taken while fasting.

Study evidence
Green Tea Supportive 84 studies
Skin Health
Skin Health
Impact
High effect
B- Goal FitC+ Strength of SupportD+ CoverageA+ Formula Quality
Green Tea · 500 mg

Green tea catechins and EGCG may support antioxidant defense and modest internal photoprotection. The formula remains narrow because it does not support collagen structure or barrier hydration.

A 500 mg extract could be meaningful, but the repeated identical quantities do not clearly state the percentages of catechins, EGCG, and total polyphenols. Concentrated green tea extract is best taken as directed because high catechin exposure can irritate the stomach and has rarely been linked to liver injury.

Study evidence
Green Tea Supportive 37 studies
Cognitive Support
Cognitive Support
Impact
High effect
C Goal FitB- Strength of SupportC- CoverageA Formula Quality
Green Tea · 500 mg

Concentrated green tea catechins and EGCG may support antioxidant protection for brain cells. The formula does not disclose the caffeine or L-theanine amounts needed to judge its value for immediate focus.

The single-extract design provides depth in one protective pathway but little support for memory, neurotransmitters, or brain-cell membranes. The 500 mg EGCG amount is above a typical preferred range, so taking it on an empty stomach may increase nausea or liver stress.

Study evidence
Green Tea Supportive 32 studies

Ingredients

IngredientAmount per serving
Green Tea extract (Catechins, EGCG, Polyphenols)
 500 mg
Gluten Free Adults 18–50 Dairy Free Women
Report overview
Green Tea (Catechins, EGCG, Polyphenols) · 500 mg OverallScore67
B Active Ingredient Quality & BioavailabilityD- Dose, Safety & Label TransparencyA+ Value

The extract clearly identifies a very concentrated EGCG and polyphenol profile. Its EGCG amount is above the preferred range but remains below the high-dose safety threshold. Low standardized cost is a strength, while absent caffeine disclosure and basic delivery limit transparency and absorption support.

View ingredientView products
Loading alternative details
84 Performance

EGCg Green Tea Extract

Protocol For Life Balance
<p>EGCg Green Tea Extract provides a clearly identified, decaffeinated 400 mg EGCG and catechin profile. Compared with the original, it improves on the original’s ambiguous repeated marker amounts or adds a useful delivery feature; however, concentrated catechins still warrant taking it with food.</p>
78 Performance

Ageless Cell

Life Extension Geroprotect
<p>Ageless Cell combines decaffeinated EGCG with meaningful N-acetyl-L-cysteine, natural vitamin E, and tocotrienols. Compared with the original, it improves on the original’s ambiguous repeated marker amounts or adds a useful delivery feature; however, its broad formula carries a higher serving cost.</p>
74 Performance

Green Tea Phytosome

Thorne
<p>Green Tea Phytosome uses a phospholipid phytosome that may improve absorption of its green-tea extract. Compared with the original, it improves on the original’s ambiguous repeated marker amounts or adds a useful delivery feature; however, EGCG yield and caffeine status are not provided.</p>
84 Budget

EGCg Green Tea Extract 400 mg

NOW
<p>EGCg Green Tea Extract 400 mg lowers the serving cost and delivers a focused, decaffeinated 400 mg EGCG formula with strong long-term value. Compared with the original, it improves on the original’s ambiguous repeated marker amounts or adds a useful delivery feature; however, highly concentrated green tea extract can still cause nausea or liver stress in susceptible users.</p>
80 Budget

Green Tea

Jarrow Formulas
<p>Green Tea lowers the serving cost and supplies a concentrated green-tea extract at a very low serving cost. Compared with the original, it improves on the original’s ambiguous repeated marker amounts or adds a useful delivery feature; however, the repeated marker amounts and missing caffeine detail make the true EGCG yield less certain.</p>
84 Budget

Green Tea Extract 500 mg

Source Naturals
<p>Green Tea Extract 500 mg lowers the serving cost and offers a simple 500 mg green-tea extract with favorable serving value. Compared with the original, it improves on the original’s ambiguous repeated marker amounts or adds a useful delivery feature; however, EGCG, polyphenol, and caffeine yields are not specified.</p>
84 Value

EGCg Green Tea Extract 400 mg

NOW
<p>EGCg Green Tea Extract 400 mg delivers a focused, decaffeinated 400 mg EGCG formula at a modest serving cost, creating a useful balance of formulation quality and value. Compared with the original, it improves on the original’s ambiguous repeated marker amounts or adds a useful delivery feature; however, highly concentrated green tea extract should be taken with food.</p>
80 Value

Pine Bark Extract 240 mg

NOW
<p>Pine Bark Extract 240 mg pairs 100 mg EGCG with 240 mg pine bark proanthocyanidins for broader antioxidant coverage, creating a useful balance of formulation quality and value. Compared with the original, it improves on the original’s ambiguous repeated marker amounts or adds a useful delivery feature; however, caffeine status and marker percentages are not fully stated.</p>
79 Value

Green Tea Extract 400 mg

NOW
<p>Green Tea Extract 400 mg combines a substantial green-tea extract with 60 mg vitamin C at a very low serving cost, creating a useful balance of formulation quality and value. Compared with the original, it improves on the original’s ambiguous repeated marker amounts or adds a useful delivery feature; however, separate EGCG and caffeine yields are not clearly disclosed.</p>
Report alternatives

Sources

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

  1. 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
  2. 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
  3. Can teatime increase one's lifetime?
    Nakachi K; Eguchi H; Imai K · Ageing research reviews · 2003
    Cohort studyAnti-Aging forGreen Tea
  4. 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
  5. 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
  6. 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
  7. 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
  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. 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
  10. 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
  11. 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
  12. 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
  13. 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
  14. 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
  15. 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
  16. Green tea catechins and blood pressure: a systematic review and meta-analysis of randomised controlled trials.
    Khalesi S; Sun J; Buys N; Jamshidi A; Nikbakht-Nasrabadi E; Khosravi-Boroujeni H · European journal of nutrition · 2015
    Meta-analysis13 studies pooledHeart Health forGreen Tea
  17. Effect of Green Tea on Blood Pressure in Healthy Individuals: A Meta-Analysis.
    Yıldırım Ayaz E; Dincer B; Mesci B · Alternative therapies in health and medicine · 2023
    Meta-analysis680 participants9 studies pooledHeart Health forGreen Tea
  18. Green tea extract reduces blood pressure, inflammatory biomarkers, and oxidative stress and improves parameters associated with insulin resistance in obese, hypertensive patients.
    Bogdanski P; Suliburska J; Szulinska M; Stepien M; Pupek-Musialik D; Jablecka A · Nutrition research (New York, N.Y.) · 2012
    Randomized trial56 participantsHeart Health forGreen Tea
  19. Green tea intake lowers fasting serum total and LDL cholesterol in adults: a meta-analysis of 14 randomized controlled trials.
    Zheng XX; Xu YL; Li SH; Liu XX; Hui R; Huang XH · The American journal of clinical nutrition · 2011
    Meta-analysis1,136 participants14 studies pooledHeart Health forGreen Tea
  20. Effects of green tea on lipid profile in overweight and obese women.
    Li A; Wang Q; Li P; Zhao N; Liang Z · International journal for vitamin and nutrition research. Internationale Zeitschrift fur Vitamin- und Ernahrungsforschung. Journal international de vitaminologie et de nutrition · 2024
    Meta-analysis1,818 participants15 studies pooledHeart Health forGreen Tea
  21. 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
  22. 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
  23. 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
  24. 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
  25. 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
  26. 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
  27. 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
  28. 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
  29. 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