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Green Tea 500 mg

Swanson
4.7
★ ★ ★ ★ ★
(6855 ratings)
Green Tea 500 mg
Product Image
Score63
A focused green tea capsule with strong value. Active potency and caffeine exposure are not characterized is the main drawback.
How scoring works
Quantity:100 Capsule(s) • (100 servings)
Goals:
Heart Health
Anti-Aging
Anti-Inflammatory Support
Metabolism Boost

Score 63

A focused green tea capsule with strong value. Active potency and caffeine exposure are not characterized is the main drawback.
How scoring works
$8.09($0.08 per serving)
iHerb
$ 8.69
iHerb
$ 8.69
Amazon
$ 8.09
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Analysis

500 mg of green tea of green tea material provides a direct source of catechins that may support antioxidant defenses and normal metabolic signaling. No extract ratio, catechin standardization, or EGCG yield is provided.

Caffeine content is not stated, making stimulant exposure difficult to judge. Active potency and caffeine exposure are not characterized prevents a fully confident comparison with better-characterized extracts.

The capsule format keeps the product focused and easy to fit into a routine. strong 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 green tea
  • Identifies EGCG or catechin markers
  • Offers strong value
  • Simple capsule format

Cons

  • active potency and caffeine exposure are not characterized
  • 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

57 Moderate impact

The label does not distinguish green tea leaf powder from extract or identify an active marker. Missing preparation, EGCG, and caffeine details make the apparent dose difficult to interpret.

Ingredient transparency

60 Moderate impact

The green tea amount is stated, while EGCG, polyphenols, and caffeine are absent. 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

68 High impact

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

Report analysis

Goals

Heart Health
Heart Health
Impact
Moderate effect
C+ Goal FitD Strength of SupportD CoverageA Formula Quality
Green Tea · 500 mg

Green tea may support endothelial function and protection from oxidative stress, giving the product moderate heart relevance. The 500 mg leaf amount lacks catechin or EGCG standardization, so active potency remains uncertain.

The focused capsule covers vascular and antioxidant support but not lipids, cardiac energy, or homocysteine with clear potency. Concentrated green tea can contain caffeine, yet the label details provided do not state the caffeine amount.

Study evidence
Green Tea Supportive 84 studies
Anti-Aging
Anti-Aging
Impact
Moderate effect
B- Goal FitF Strength of SupportD+ CoverageA- Formula Quality
Green Tea · 500 mg

Green tea can support antioxidant and metabolic aging pathways through catechins such as EGCG. The formula could be relevant, but the supplied label does not show whether the ingredient is tea powder or extract.

The 500 mg amount appears substantial by weight, yet EGCG, polyphenols, and caffeine are all undisclosed. Uncertain active content prevents a reliable judgment of effectiveness or stimulant exposure.

Study evidence
Green Tea Supportive 9 studies
Anti-Inflammatory Support
Anti-Inflammatory Support
Impact
Moderate effect
B Goal FitF Strength of SupportF CoverageA+ Formula Quality
Green Tea · 500 mg

Green tea can influence inflammatory signaling through catechins such as EGCG and has useful human evidence when active exposure is known. The label gives only a total green tea amount, so the actual catechin and caffeine doses cannot be determined.

Missing extract status and standardization make the 500 mg weight a poor measure of potency. Undisclosed caffeine also prevents stimulant-sensitive users from judging the risk of jitteriness or sleep disruption.

Study evidence
Green Tea Mixed 16 studies
Metabolism Boost
Metabolism Boost
Impact
Moderate effect
B- Goal FitF Strength of SupportF CoverageA- Formula Quality
Green Tea · 500 mg

Green tea can support thermogenesis and fat oxidation when enough catechins and caffeine are present. A 500 mg total amount alone does not show that this capsule supplies those actives.

The label omits extract status, EGCG, total catechins, and caffeine. That missing information makes both likely effect and stimulant exposure impossible to judge.

Study evidence
Green Tea Supportive 31 studies

Ingredients

IngredientAmount per serving
Green Tea
500 mg
Adults 18–50
Report overview
Green Tea · 500 mg OverallScore2
F Active Ingredient Quality & BioavailabilityF Dose, Safety & Label TransparencyF Value

The label provides a green tea amount but does not clarify its form or active-marker content. Caffeine exposure and EGCG dosing cannot be assessed. Value for active EGCG is therefore unverifiable.

View ingredientView products
Loading alternative details
76 Performance

Mega Green Tea Extract

Life Extension
<p>Compared with the original, it keeps the green-tea focus and retains relevant support for heart health and anti-aging. 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>
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>
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>
77 Budget

Green Tea Extract

ZHOU
<p>The supplied data does not show a lower recurring cost than the original, though it remains an eligible green-tea alternative. 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>
80 Budget

Green Tea

Jarrow Formulas
<p>The supplied data does not show a lower recurring cost than the original, though it remains an eligible green-tea alternative. 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 Value

EGCg Green Tea Extract 400 mg

NOW
<p>It matches the original green-tea collection, but the supplied cost data does not establish a cheaper serving. 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 Value

EGCg Green Tea Extract

Protocol For Life Balance
<p>It matches the original green-tea collection, but the supplied cost data does not establish a cheaper serving. 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>
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 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 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. 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
  22. 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
  23. 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
  24. 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
  25. 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
  26. 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
  27. 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