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Green Tea Fat Burner

Applied Nutrition
4.2
★ ★ ★ ★ ★
(7118 ratings)
Green Tea 400 mg
Caffeine 160 mg
Product Image
Score62
Useful green tea and caffeine amounts support short-term energy, but two opaque blends weaken confidence in the full formula. It fits stimulant-tolerant users better than anyone seeking broad or highly transparent support.
How scoring works
Quantity:30 Softgel(s) • (15 servings)
Goals:
Metabolism Boost
Energy
Weight Loss
Productivity Boost
Fitness
Cognitive Support
Anti-Aging
Anti-Inflammatory Support
Mental Focus

Score 62

Useful green tea and caffeine amounts support short-term energy, but two opaque blends weaken confidence in the full formula. It fits stimulant-tolerant users better than anyone seeking broad or highly transparent support.
How scoring works

Also available as

1 option
90 servings Caffeine 160 mg, Green Tea 400 mg • 90 Softgel(s) • 45 servings $17.89 ($0.39 per serving)
$9.99($0.66 per serving)
Amazon
$ 13.41
iHerb
$ 9.99
Report prices

Analysis

The disclosed core combines 400 mg of green tea extract labeled as EGCG with 160 mg of caffeine. Those amounts are relevant to alertness and short-term energy expenditure, though weight-related effects are usually modest.

Antioxidant Boost and Vitality Boost list only blend names and total weights. Their hidden ingredients prevent a full assessment of the stimulant load, interactions, and contribution to the many attached goals.

The softgel format is convenient, and the smaller package has only a short supply. Caffeine sensitivity and timing matter more than the broad anti-aging, skin, cognitive, fitness, and muscle-gain positioning.

Who is it for
  • Adults who tolerate moderate caffeine well
  • Users seeking short-term energy and thermogenic support
  • People who can avoid late-day stimulant use
Best for
  • Short-term alertness
  • Caffeine-supported workouts
  • A softgel alternative to powdered stimulants

Pros

  • Clearly states the caffeine amount
  • Provides a substantial green tea extract amount
  • Uses a convenient softgel format
  • Offers reasonable value for the disclosed core

Cons

  • Hides two blends behind vague names
  • Does not state green tea standardization percentage
  • Lacks a balancing ingredient such as L-theanine
  • Offers weak direct support for several attached goals

Warnings

  • The 160 mg caffeine serving may cause jitters, a faster heartbeat, anxiety, or sleep disruption.
  • Avoid combining it with other stimulant products or taking it close to bedtime.
  • Concentrated green tea extract may increase liver stress when taken while fasting; take it with food unless the label directs otherwise.

Nutrient quality

71 High impact

EGCG identifies a useful standardized green tea constituent, while the remaining additions lack specific forms. Green tea extract and caffeine are present in potentially meaningful amounts, but the two support blends are difficult to evaluate.

Ingredient transparency

55 Moderate impact

Amounts are shown for every listed active, though the contents of two support ingredients remain unknown. Excipients and other inactive ingredients are not included in the supplied label data.

Customer satisfaction

65 Moderate impact

The supplied aggregate rating is solid but not exceptional, and no experience details are provided. No specific feedback is supplied, so recurring complaints cannot be assessed.

Value for money

58 Moderate impact

The core actives are useful, but vague extras and a short supply limit the formula quality received. The serving cost is moderate, yet the small bottle provides limited ongoing value.

Report analysis

Goals

Metabolism Boost
Metabolism Boost
Impact
Highest effect
A Goal FitB+ Strength of SupportB+ CoverageA- Formula Quality
Green Tea · 400 mgCaffeine · 160 mg

Green-tea EGCG and caffeine form a well-aligned thermogenic pair that can modestly increase short-term energy expenditure and fat oxidation. The active amounts are clearly stated and fall within practical ranges.

Effects are usually modest and tolerance can lessen with habitual caffeine use. The 160 mg caffeine amount may cause jitters, rapid heartbeat, or sleep disruption in sensitive users, especially when taken late.

Study evidence
Caffeine Disputed 40 studies
Green Tea Supportive 31 studies
Energy
Energy
Impact
Highest effect
A+ Goal FitB+ Strength of SupportB+ CoverageC+ Formula Quality
Caffeine · 160 mg

Caffeine provides acute alertness while green tea extract adds a related metabolic and antioxidant pathway. Both principal amounts are meaningful for a short-term energy effect.

Two proprietary boost blends hide their ingredients and make the wider stimulant load difficult to assess. The 160 mg caffeine serving may cause jitters, a faster heartbeat, or sleep disruption, especially when taken late or combined with other stimulants.

Study evidence
Caffeine Supportive 68 studies
Weight Loss
Weight Loss
Impact
Highest effect
A- Goal FitB+ Strength of SupportB- CoverageB Formula Quality
Green Tea · 400 mgCaffeine · 160 mg

Green tea extract and caffeine form a well-aligned thermogenic combination with clearly stated amounts. The formula directly targets energy expenditure, although the two supporting blends are not transparent enough to assess.

The green tea and caffeine amounts are substantial without being spread across many named stimulants. The 160 mg caffeine dose may cause jitters, rapid heartbeat, or sleep disruption in stimulant-sensitive users.

Study evidence
Caffeine Disputed 14 studies
Green Tea Supportive 42 studies
Productivity Boost
Productivity Boost
Impact
High effect
A- Goal FitB Strength of SupportB- CoverageD Formula Quality
Caffeine · 160 mg

Caffeine provides reliable acute alertness, while green-tea catechins add a secondary energy and antioxidant pathway. The formula can support short-term output but is less balanced than a caffeine and theanine stack.

The stimulant amount is practical and clearly stated, while the two proprietary blends cannot be judged. Sensitive users may experience jitters or sleep disruption, particularly when the softgels are taken late in the day.

Study evidence
Caffeine Supportive 108 studies
Fitness
Fitness
Impact
High effect
B+ Goal FitB- Strength of SupportC CoverageC- Formula Quality
Caffeine · 160 mg

Caffeine provides a practical evidence-based amount for alertness and reduced perceived exertion. Green tea extract adds a substantial catechin source, but the formula is oriented more toward stimulation and fat loss than broad fitness performance.

Two blends hide individual ingredients and amounts, limiting safety and contribution assessment. Caffeine may cause jitters or sleep disruption, especially in sensitive users or when taken late in the day.

Study evidence
Caffeine Supportive 255 studies
Cognitive Support
Cognitive Support
Impact
High effect
B- Goal FitB Strength of SupportC CoverageC- Formula Quality
Green Tea · 400 mg

EGCG and caffeine can support alertness and antioxidant protection, giving the green tea blend direct cognitive relevance. Caffeine has strong human evidence for alertness, while EGCG evidence is more supportive and the extra blends remain uncertain.

The label supplies 400 mg of EGCG and 160 mg of caffeine, both meaningful amounts. The main amounts are clear, but the extract percentage and two proprietary blend contents are not disclosed. The 160 mg caffeine amount may cause jitters, sleep disruption, or a faster heart rate in sensitive users.

Study evidence
Green Tea Supportive 32 studies

Ingredients

IngredientAmount per serving
Green Tea extract (EGCG)
 400 mg
Caffeine
160 mg
Antioxidant Boost
100 mg
Vitality Boost
86 mg
Adults 18–50
Report overview
Green Tea (EGCG) · 400 mg OverallScore63
F Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyB Value

The label clearly supplies 400 mg of EGCG, although it does not state the extract's standardization percentage or use an advanced delivery system. The dose fits the target range, and the exact 160 mg caffeine amount helps users manage stimulant intake. Caffeine-sensitive users may experience jitters or disrupted sleep, while the active EGCG cost remains good.

View ingredientView products
Caffeine · 160 mg OverallScore61
F Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyC Value
The clearly stated caffeine amount sits in a practical range for focus and performance, and the softgel offers fast standard release. The label calls the ingredient only caffeine and provides no source or advanced release technology, limiting form-quality assessment. Cost is close to the collection norm, while stimulant-sensitive users may still experience jitters or sleep disruption if taken late.
View ingredientView products
Loading alternative details
83 Performance

TheanineUP Focused Energy

California Gold Nutrition
<p>It offers a clearer ingredient trade-off because 100 mg each of caffeine and L-theanine creates a balanced focus pairing, with matcha and cocoa adding mild support. It may still disrupt sleep in sensitive users and does not replace pump ingredients in a full pre-workout.</p>
84 Performance

L-Theanine & Caffeine

SR Sports Research
<p>It offers a clearer ingredient trade-off because 200 mg of L-theanine paired with 100 mg of green-coffee caffeine supports alertness with a gentler stimulant balance. It does not provide citrulline, beta-alanine, or other workout-performance ingredients.</p>
84 Performance

EGCg Green Tea Extract

Protocol For Life Balance
<p>It offers a clearer ingredient trade-off because 400 mg of decaffeinated green tea extract clearly identifies a substantial catechin and EGCG profile. It offers no stimulant energy, and high-EGCG extract may cause nausea or rare liver injury when taken fasting.</p>
87 Budget

Caffeine 200 mg

ALLMAX
<p>It lowers recurring cost while 200 mg of clearly disclosed caffeine provides straightforward short-term energy and focus. The immediate-release formula may cause jitters or sleep disruption and offers little beyond stimulation.</p>
84 Budget

EGCg Green Tea Extract 400 mg

NOW
<p>It lowers recurring cost while 400 mg of decaffeinated green tea extract provides focused catechin and EGCG exposure without added stimulant load. Concentrated green tea extract may cause nausea or rare liver injury, especially when taken fasting.</p>
80 Budget

Green Tea

Jarrow Formulas
<p>It lowers recurring cost while green tea extract identifies catechins, polyphenols, and EGCG for focused antioxidant and metabolic support. Repeated full-amount entries make marker yields unclear, and caffeine content is not disclosed.</p>
82 Value

Caffeine 200 mg

Best Naturals
<p>It balances formula purpose and value because 200 mg of clearly disclosed caffeine provides predictable energy at low recurring cost. The formula offers no green-tea catechins or workout pump ingredients and may disturb sleep.</p>
84 Value

Smart Caffeine with L-Theanine

NS Natural Stacks
<p>It balances formula purpose and value because 200 mg of L-theanine paired with 100 mg of green-coffee caffeine provides practical calm-focus dosing. It has no controlled-release feature and does not supply a broader pre-workout ingredient base.</p>
74 Value

Hydroxycut Hardcore Elite

MuscleTech Performance Series
<p>It balances formula purpose and value because 270 mg of caffeine with green coffee, theanine, cocoa, coleus, and yohimbe creates strong stimulant and thermogenic effects. The aggressive combination may increase anxiety, rapid heartbeat, or blood pressure and should not be stacked with stimulants.</p>
Report alternatives

Sources

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

  1. Effects of Caffeine Intake on Cognitive Performance Related to Total Sleep Deprivation and Time on Task: A Randomized Cross-Over Double-Blind Study.
    Quiquempoix M; Sauvet F; Erblang M; Van Beers P; Guillard M; Drogou C; Trignol A; Vergez A; Léger D; Chennaoui M; Gomez-Merino D; Rabat A · Nature and science of sleep · 2022
    Randomized trial24 participantsEnergy Productivity Boost forCaffeine
  2. No effects of caffeine on cycling to exhaustion and perceptual responses in non-caffeine-restricted subjects.
    Weippert M; Behrens M; Schlegel M; Schröder T; Tillmann M; Rühe N; Römer R; Mau-Möller A; Bruhn S · Journal of the International Society of Sports Nutrition · 2025
    Randomized trial56 participantsEnergy Fitness forCaffeine
  3. Differential cognitive effects of energy drink ingredients: caffeine, taurine, and glucose.
    Giles GE; Mahoney CR; Brunyé TT; Gardony AL; Taylor HA; Kanarek RB · Pharmacology, biochemistry, and behavior · 2013
    Randomized trial48 participantsEnergy forCaffeine
  4. Effect of caffeine ingestion on cycling performance: a systematic review and meta-analysis.
    Wu J; Xu K; Yin M; Ding X; Wang T; Zhang Q; Wu X; Xiao N · Frontiers in nutrition · 2026
    Meta-analysis226 participants20 studies pooledFitness forCaffeine
  5. The effects of green tea extract supplementation on body composition, obesity-related hormones and oxidative stress markers: a grade-assessed systematic review and dose-response meta-analysis of randomised controlled trials.
    Asbaghi O; Rezaei Kelishadi M; Larky DA; Bagheri R; Amirani N; Goudarzi K; Kargar F; Ghanavati M; Zamani M · The British journal of nutrition · 2024
    Meta-analysis3,802 participants59 studies pooledWeight Loss forGreen Tea
  6. Effects of green tea on weight maintenance after body-weight loss.
    Kovacs EM; Lejeune MP; Nijs I; Westerterp-Plantenga MS · The British journal of nutrition · 2004
    Randomized trial104 participantsWeight Loss forGreen Tea
  7. Green tea catechin consumption enhances exercise-induced abdominal fat loss in overweight and obese adults.
    Maki KC; Reeves MS; Farmer M; Yasunaga K; Matsuo N; Katsuragi Y; Komikado M; Tokimitsu I; Wilder D; Jones F; Blumberg JB; Cartwright Y · The Journal of nutrition · 2009
    Randomized trial132 participantsWeight Loss forGreen Tea
  8. Caffeine treatment prevented from weight regain after calorie shifting diet induced weight loss.
    Davoodi SH; Hajimiresmaiel SJ; Ajami M; Mohseni-Bandpei A; Ayatollahi SA; Dowlatshahi K; Javedan G; Pazoki-Toroudi H · Iranian journal of pharmaceutical research : IJPR · 2014
    Non-randomized trial60 participantsWeight Loss forCaffeine
  9. High-power therapeutic ultrasound for treatment of abdominal localized adiposity-double-blind randomized clinical trial.
    da Silva Siqueira K; Maia JM · Lasers in medical science · 2020
    Randomized trial90 participantsWeight Loss forCaffeine
  10. Effects of modafinil and caffeine on night-time vigilance of air force crewmembers: A randomized controlled trial.
    Wingelaar-Jagt YQ; Bottenheft C; Riedel WJ; Ramaekers JG · Journal of psychopharmacology (Oxford, England) · 2023
    Randomized trial32 participantsMental Focus forCaffeine
  11. Physiological and cognitive responses to caffeine during repeated, high-intensity exercise.
    Crowe MJ; Leicht AS; Spinks WL · International journal of sport nutrition and exercise metabolism · 2007
    Randomized trial17 participantsMental Focus forCaffeine
  12. Effects of Acute Caffeine Ingestion on Cognitive Performance before and after Repeated Small-Sided Games in Professional Soccer Players: A Placebo-Controlled, Randomized Crossover Trial.
    de Almeida RF; de Oliveira M; Furigo IC; Aquino R; Clarke ND; Tallis J; Guimaraes-Ferreira L · Nutrients · 2023
    Randomized trial12 participantsProductivity Boost forCaffeine
  13. Wake up and smell the coffee: caffeine supplementation and exercise performance-an umbrella review of 21 published meta-analyses.
    Grgic J; Grgic I; Pickering C; Schoenfeld BJ; Bishop DJ; Pedisic Z · British journal of sports medicine · 2020
    Systematic review21 studies pooledMuscle Gain forCaffeine
  14. Caffeine Optimizes HIIT Benefits on Obesity-associated Metabolic Adversity in Women.
    Alkhatib A; Hsieh MJ; Kuo CH; Hou CW · Medicine and science in sports and exercise · 2021
    Randomized trial24 participantsMuscle Gain forCaffeine
  15. 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
  16. 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
  17. Can teatime increase one's lifetime?
    Nakachi K; Eguchi H; Imai K · Ageing research reviews · 2003
    Cohort studyAnti-Aging forGreen Tea
  18. 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
  19. 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
  20. 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
  21. 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
  22. 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
  23. 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
  24. 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
  25. 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
  26. 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
  27. 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
  28. 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
  29. 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
  30. Cognitive and mood improvements of caffeine in habitual consumers and habitual non-consumers of caffeine.
    Haskell CF; Kennedy DO; Wesnes KA; Scholey AB · Psychopharmacology · 2005
    Randomized trial48 participantsEnergy forCaffeine
  31. Caffeine-containing energy drink improves physical performance of elite rugby players during a simulated match.
    Del Coso J; Ramírez JA; Muñoz G; Portillo J; Gonzalez-Millán C; Muñoz V; Barbero-Álvarez JC; Muñoz-Guerra J · Applied physiology, nutrition, and metabolism = Physiologie appliquee, nutrition et metabolisme · 2016
    Randomized trial26 participantsEnergy forCaffeine
  32. Does Single or Combined Caffeine and Taurine Supplementation Improve Athletic and Cognitive Performance without Affecting Fatigue Level in Elite Boxers? A Double-Blind, Placebo-Controlled Study.
    Ozan M; Buzdagli Y; Eyipinar CD; Baygutalp NK; Yüce N; Oget F; Kan E; Baygutalp F · Nutrients · 2022
    Randomized trial20 participantsEnergy forCaffeine
  33. Trait Energy and Fatigue Modify the Effects of Caffeine on Mood, Cognitive and Fine-Motor Task Performance: A Post-Hoc Study.
    Fuller DT; Smith ML; Boolani A · Nutrients · 2021
    Randomized trialEnergy forCaffeine
  34. Effects of Caffeine Intake on Endurance Running Performance and Time to Exhaustion: A Systematic Review and Meta-Analysis.
    Wang Z; Qiu B; Gao J; Del Coso J · Nutrients · 2023
    Meta-analysis254 participants21 studies pooledFitness forCaffeine
  35. Acute Effects of Caffeine Supplementation on Movement Velocity in Resistance Exercise: A Systematic Review and Meta-analysis.
    Raya-González J; Rendo-Urteaga T; Domínguez R; Castillo D; Rodríguez-Fernández A; Grgic J · Sports medicine (Auckland, N.Z.) · 2021
    Meta-analysis12 studies pooledFitness forCaffeine
  36. Sex Differences in the Ergogenic Response of Acute Caffeine Intake on Muscular Strength, Power and Endurance Performance in Resistance-Trained Individuals: A Randomized Controlled Trial.
    Montalvo-Alonso JJ; Ferragut C; Del Val-Manzano M; Valadés D; Roberts J; Pérez-López A · Nutrients · 2024
    Randomized trial76 participantsFitness forCaffeine
  37. Can I Have My Coffee and Drink It? A Systematic Review and Meta-analysis to Determine Whether Habitual Caffeine Consumption Affects the Ergogenic Effect of Caffeine.
    Carvalho A; Marticorena FM; Grecco BH; Barreto G; Saunders B · Sports medicine (Auckland, N.Z.) · 2022
    Meta-analysis60 studies pooledFitness forCaffeine
  38. Acute effects of caffeine on attention: a comparison of non-consumers and withdrawn consumers.
    Smith AP; Christopher G; Sutherland D · Journal of psychopharmacology (Oxford, England) · 2013
    Randomized trial70 participantsMental Focus forCaffeine
  39. Performance and alertness effects of caffeine, dextroamphetamine, and modafinil during sleep deprivation.
    Wesensten NJ; Killgore WD; Balkin TJ · Journal of sleep research · 2006
    Randomized trial48 participantsMental Focus forCaffeine
  40. Effects of caffeine on mood and performance: a study of realistic consumption.
    Brice CF; Smith AP · Psychopharmacology · 2003
    Clinical trial24 participantsMental Focus forCaffeine
  41. Effects of caffeine or diphenhydramine on visual vigilance.
    Fine BJ; Kobrick JL; Lieberman HR; Marlowe B; Riley RH; Tharion WJ · Psychopharmacology · 1995
    Randomized trial24 participantsMental Focus forCaffeine
  42. A Randomized Study to Examine the Ability of a Caffeine-Based Energy Drink to Impact Energy Expenditure, Fat Oxidation, and Cognitive Performance.
    Krieger J; Schrautemeier A; Hagele A; Gaige C; Mennemeyer O; Tolbert S; Iannotti J; Kerksick C; Noonan C; Mumford P · Nutrients · 2025
    Randomized trial60 participantsMetabolism Boost forCaffeine
  43. Oolong tea increases metabolic rate and fat oxidation in men.
    Rumpler W; Seale J; Clevidence B; Judd J; Wiley E; Yamamoto S; Komatsu T; Sawaki T; Ishikura Y; Hosoda K · The Journal of nutrition · 2001
    Randomized trial12 participantsMetabolism Boost forCaffeine
  44. Effect of caffeine intake on fat oxidation rate during exercise: is there a dose-response effect?
    Gutiérrez-Hellín J; Aguilar-Navarro M; Ruiz-Moreno C; Muñoz A; Varillas-Delgado D; Amaro-Gahete FJ; Del Coso J · European journal of nutrition · 2023
    Randomized trial18 participantsMetabolism Boost forCaffeine
  45. Comparison of changes in energy expenditure and body temperatures after caffeine consumption.
    Koot P; Deurenberg P · Annals of nutrition & metabolism · 1995
    Randomized trial12 participantsMetabolism Boost forCaffeine
  46. Caffeine Increases Work Done above Critical Power, but Not Anaerobic Work.
    Silveira R; Andrade-Souza VA; Arcoverde L; Tomazini F; Sansonio A; Bishop DJ; Bertuzzi R; Lima-Silva AE · Medicine and science in sports and exercise · 2018
    Randomized trial9 participantsMetabolism Boost forCaffeine
  47. 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
  48. 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
  49. 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
  50. 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
  51. 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
  52. Effects of caffeine on alertness.
    Zwyghuizen-Doorenbos A; Roehrs TA; Lipschutz L; Timms V; Roth T · Psychopharmacology · 1990
    Randomized trial24 participantsProductivity Boost forCaffeine
  53. Effects of Different Sources of Low-Dose Caffeine on Mood/Arousal and Cognitive Performance.
    Irwin C; McCartney D; Grant G; Delang N; Bartrim K; Cox GR; Desbrow B · Perceptual and motor skills · 2023
    Randomized trial22 participantsProductivity Boost forCaffeine
  54. Effects of caffeine, sleep loss, and stress on cognitive performance and mood during U.S. Navy SEAL training. Sea-Air-Land.
    Lieberman HR; Tharion WJ; Shukitt-Hale B; Speckman KL; Tulley R · Psychopharmacology · 2003
    Randomized trial68 participantsProductivity Boost forCaffeine
  55. A review of caffeine's effects on cognitive, physical and occupational performance.
    McLellan TM; Caldwell JA; Lieberman HR · Neuroscience and biobehavioral reviews · 2017
    Narrative reviewProductivity Boost forCaffeine
  56. Acute caffeine supplementation as a nutrition-based strategy to mitigate sleep-loss-related cognitive and operational performance impairments in military personnel: a systematic review and meta-analysis.
    Wang R; Wang W; Meng L; Hao G; Gu G · Frontiers in nutrition · 2026
    Meta-analysis7 studies pooledProductivity Boost forCaffeine
  57. 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
  58. 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
  59. 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
  60. 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
  61. Changes in caffeine intake and long-term weight change in men and women.
    Lopez-Garcia E; van Dam RM; Rajpathak S; Willett WC; Manson JE; Hu FB · The American journal of clinical nutrition · 2006
    Cohort study58,157 participantsWeight Loss forCaffeine
  62. Does caffeine ingestion before a short-term sprint interval training promote body fat loss?
    Ferreira GA; Felippe LC; Bertuzzi R; Bishop DJ; Ramos IS; De-Oliveira FR; Lima-Silva AE · Brazilian journal of medical and biological research = Revista brasileira de pesquisas medicas e biologicas · 2020
    Randomized trial20 participantsWeight Loss forCaffeine
  63. Eight Weeks of Sprint Interval Training With Adding Caffeine Ingestion Leads to Greater Improvements in Health-Related Physiological Parameters in Obese Male Adults.
    Zhiang J; Song Q · Physiological research · 2026
    Randomized trial30 participantsWeight Loss forCaffeine
  64. The effects of caffeine intake on weight loss: a systematic review and dos-response meta-analysis of randomized controlled trials.
    Tabrizi R; Saneei P; Lankarani KB; Akbari M; Kolahdooz F; Esmaillzadeh A; Nadi-Ravandi S; Mazoochi M; Asemi Z · Critical reviews in food science and nutrition · 2020
    Meta-analysis606 participants13 studies pooledWeight Loss forCaffeine
  65. A green tea extract high in catechins reduces body fat and cardiovascular risks in humans.
    Nagao T; Hase T; Tokimitsu I · Obesity (Silver Spring, Md.) · 2007
    Randomized trial240 participantsWeight Loss forGreen Tea
  66. Green tea beverages enriched with catechins with a galloyl moiety reduce body fat in moderately obese adults: a randomized double-blind placebo-controlled trial.
    Kobayashi M; Kawano T; Ukawa Y; Sagesaka YM; Fukuhara I · Food & function · 2016
    Randomized trial126 participantsWeight Loss forGreen Tea
  67. Effect of Decaffeinated Green Tea Polyphenols on Body Fat and Precocious Puberty in Obese Girls: A Randomized Controlled Trial.
    Xie L; Tang Q; Yao D; Gu Q; Zheng H; Wang X; Yu Z; Shen X · Frontiers in endocrinology · 2022
    Randomized trial62 participantsWeight Loss forGreen Tea
  68. Effectiveness of green tea on weight reduction in obese Thais: A randomized, controlled trial.
    Auvichayapat P; Prapochanung M; Tunkamnerdthai O; Sripanidkulchai BO; Auvichayapat N; Thinkhamrop B; Kunhasura S; Wongpratoom S; Sinawat S; Hongprapas P · Physiology & behavior · 2008
    Randomized trial60 participantsWeight Loss forGreen Tea