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Green Tea Extract 500 mg

Swanson
4.7
★ ★ ★ ★ ★
(3110 ratings)
Green Tea 500 mg
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Score67
A focused green tea capsule with good value. The missing standardization percentage and caffeine content prevent dose verification is the main drawback.
How scoring works
Quantity:60 Capsule(s) • (60 servings)
Goals:
Metabolism Boost
Anti-Inflammatory Support
Anti-Aging
Skin Health

Score 67

A focused green tea capsule with good value. The missing standardization percentage and caffeine content prevent dose verification is the main drawback.
How scoring works
$9.09($0.15 per serving)
iHerb
$ 9.09
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Analysis

500 mg of standardized extract plus 50 mg green tea of green tea material provides a direct source of catechins that may support antioxidant defenses and normal metabolic signaling. The label calls the main extract standardized but does not state the percentage or EGCG yield.

Caffeine content is not stated, making stimulant exposure difficult to judge. The missing standardization percentage and caffeine content prevent dose verification prevents a fully confident comparison with better-characterized extracts.

The capsule format keeps the product focused and easy to fit into a routine. good value is useful, though the formula addresses only one botanical pathway and should not be treated as a broad health supplement.

Who is it for
  • Adults seeking concentrated green tea catechins
  • People comfortable with potentially caffeinated green tea
Best for
  • Green tea catechin intake
  • Antioxidant support
  • Metabolic-support routines

Pros

  • Provides 500 mg of standardized extract plus 50 mg green tea
  • Identifies EGCG or catechin markers
  • Offers good value
  • Simple capsule format

Cons

  • the missing standardization percentage and caffeine content prevent dose verification
  • Caffeine amount is not disclosed
  • No absorption-support ingredients
  • Narrow single-botanical scope

Warnings

  • Concentrated green tea extract has occasionally been linked with liver injury, particularly when taken fasting; stop use for dark urine, jaundice, or persistent upper-abdominal pain.
  • Green tea catechins can reduce non-heme iron absorption, so people using oral iron should separate the servings.
  • Caffeine content is not disclosed, so caffeine-sensitive users cannot predict effects on sleep, heart rate, or anxiety.

Nutrient quality

67 High impact

The extract is described as standardized to polyphenols, but no percentage or EGCG yield is supplied. The concentrated format looks useful, but missing active-marker and stimulant information limits confidence.

Ingredient transparency

68 High impact

Extract and leaf amounts are stated, while EGCG, marker percentage, and caffeine are missing. No proprietary blend hides the listed active doses.

Customer satisfaction

72 High impact

The supplied average is strong, with very large response volume. Complaint patterns and purpose-related experiences are not supplied.

Value for money

62 Moderate impact

The asking price is only partly justified by the disclosed formula. Serving value is moderate relative to the formula quality.

Report analysis

Goals

Metabolism Boost
Metabolism Boost
Impact
High effect
B+ Goal FitD+ Strength of SupportD- CoverageA Formula Quality
Green Tea · 50 mg

Green tea extract directly targets fat oxidation and thermogenesis through catechins and any naturally retained caffeine. The total extract amount is substantial, but the label does not reveal EGCG yield, polyphenol percentage, caffeine content, or decaffeination status.

A streamlined capsule keeps the formula focused and avoids unrelated ingredients. Its practical strength remains uncertain until the active catechin and stimulant amounts are known.

Study evidence
Green Tea Supportive 31 studies
Anti-Inflammatory Support
Anti-Inflammatory Support
Impact
Moderate effect
B+ Goal FitD Strength of SupportF CoverageA Formula Quality
Green Tea · 50 mg

Green tea polyphenols directly support antioxidant defenses and inflammatory signaling control. Missing EGCG yield and standardization percentages prevent a reliable potency assessment.

The large extract weight may be meaningful, but weight alone cannot confirm the active catechin dose. The focused formula is coherent yet limited to one botanical pathway.

Study evidence
Green Tea Mixed 16 studies
Anti-Aging
Anti-Aging
Impact
Moderate effect
B- Goal FitF Strength of SupportF CoverageB+ Formula Quality
Green Tea · 50 mg

Green tea extract may support antioxidant defenses and metabolic signaling relevant to healthy aging. Human evidence supports selected risk markers more clearly than direct longevity outcomes.

The label lists a standardized 500 mg extract plus 50 mg of green tea but omits the standardization percentage and EGCG yield. Caffeine content and decaffeination status are also missing, so active potency and stimulant exposure remain uncertain.

Study evidence
Green Tea Supportive 9 studies
Skin Health
Skin Health
Impact
Moderate effect
D+ Goal FitD- Strength of SupportF CoverageA- Formula Quality
Green Tea · 50 mg

Green tea polyphenols may support antioxidant defense against environmental skin stress. The simple capsule keeps the botanical focus clear.

EGCG yield, standardization percentage, and caffeine content are not disclosed. Those omissions make the skin-active dose and tolerability difficult to judge.

Study evidence
Green Tea Supportive 37 studies

Ingredients

IngredientAmount per serving
Green Tea standardized extract (Polyphenols)
 500 mg
Green Tea
50 mg
Adults 18–50
Report overview
Green Tea (Polyphenols) · 500 mg OverallScore8
F Active Ingredient Quality & BioavailabilityF Dose, Safety & Label TransparencyF Value

The extract names an active marker but does not disclose a standardization percentage, while no catechin absorption technology or stabilizing cofactor is listed. The label does not disclose a specific EGCG amount, and caffeine content and decaffeination status are not disclosed. The extract is described as standardized without the percentage or EGCG yield needed to verify potency; value per active EGCG amount cannot be verified because EGCG is not disclosed.

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>It lowers recurring cost compared with the original while staying in the same green-tea collection. 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>
73 Budget

Green Tea

Paradise
<p>It lowers recurring cost compared with the original while staying in the same green-tea collection. 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>
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 Value

Decaffeinated 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. 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>
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>
66 Value

Green Tea Fat Burner

Applied Nutrition
<p>It matches the original green-tea collection, but the supplied cost data does not establish a cheaper serving. The formula combines a concentrated green tea extract with a moderate stimulant dose, but two vaguely named additions limit confidence in the complete blend. The larger supply offers better practical value than the smaller version.</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 or green tea extract on insulin sensitivity and glycaemic control in populations at risk of type 2 diabetes mellitus: a systematic review and meta-analysis of randomised controlled trials.
    Wang X; Tian J; Jiang J; Li L; Ying X; Tian H; Nie M · Journal of human nutrition and dietetics : the official journal of the British Dietetic Association · 2015
    Meta-analysis510 participants7 studies pooledMetabolism Boost forGreen Tea
  2. Metabolic response to green tea extract during rest and moderate-intensity exercise.
    Hodgson AB; Randell RK; Boon N; Garczarek U; Mela DJ; Jeukendrup AE; Jacobs DM · The Journal of nutritional biochemistry · 2013
    Randomized trial27 participantsMetabolism Boost forGreen Tea
  3. 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
  4. 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
  5. 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
  6. Metabolic response to epigallocatechin-3-gallate in relapsing-remitting multiple sclerosis: a randomized clinical trial.
    Mähler A; Steiniger J; Bock M; Klug L; Parreidt N; Lorenz M; Zimmermann BF; Krannich A; Paul F; Boschmann M · The American journal of clinical nutrition · 2015
    Randomized trial18 participantsMetabolism Boost forGreen Tea
  7. Effect of Acute and Chronic Dietary Supplementation with Green Tea Catechins on Resting Metabolic Rate, Energy Expenditure and Respiratory Quotient: A Systematic Review.
    Rondanelli M; Riva A; Petrangolini G; Allegrini P; Perna S; Faliva MA; Peroni G; Naso M; Nichetti M; Perdoni F; Gasparri C · Nutrients · 2021
    Systematic review499 participants15 studies pooledMetabolism Boost forGreen Tea
  8. Epigallocatechin-3-gallate and postprandial fat oxidation in overweight/obese male volunteers: a pilot study.
    Thielecke F; Rahn G; Böhnke J; Adams F; Birkenfeld AL; Jordan J; Boschmann M · European journal of clinical nutrition · 2011
    Randomized trial10 participantsMetabolism Boost forGreen Tea
  9. Effects of timing of acute catechin-rich green tea ingestion on postprandial glucose metabolism in healthy men.
    Takahashi M; Ozaki M; Miyashita M; Fukazawa M; Nakaoka T; Wakisaka T; Matsui Y; Hibi M; Osaki N; Shibata S · The Journal of nutritional biochemistry · 2020
    Randomized trial17 participantsMetabolism Boost forGreen Tea
  10. Time-of-day-dependent effects of a green tea extract on postprandial glycemia and insulinemia in healthy adults: a randomized, controlled, double-blind, cross-over intervention.
    Sulaimani N; Rosbotham EJ; Warnock R; Polzella L; Judowski R; Nicolotti L; Houghton MJ; Williamson G; Bonham MP · Food & function · 2025
    Randomized trial14 participantsMetabolism Boost 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. 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
  17. 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
  18. 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
  19. 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
  20. 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
  21. 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
  22. 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
  23. 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
  24. 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
  25. 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
  26. 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