Product Image

Green Tea Fat Metabolizer

Irwin Naturals
4.3
★ ★ ★ ★ ★
(443 ratings)
Caffeine 0 NP
Green Tea 400 mg
Chromium 125 mcg
Fish Oil 851 mg
Product Image
Score51
A moderate caffeine dose and green tea give the formula clear thermogenic intent. Unquantified synephrine, EGCG, and omega-3 actives make both potency and safety harder to judge.
How scoring works
Quantity:75 Softgel(s) • (37 servings)
Goals:
Metabolism Boost
Energy

Score 51

A moderate caffeine dose and green tea give the formula clear thermogenic intent. Unquantified synephrine, EGCG, and omega-3 actives make both potency and safety harder to judge.
How scoring works

Also available as

1 option
150 servings Omega-3 255 mg, Fish Oil 851 mg +2 more • 150 Liquid(s) • 75 servings $44.99 ($0.59 per serving)
$24.99($0.67 per serving)
iHerb
$ 24.99
Vitacost
$ 24.99
Pure Formulas
$ 24.99
Vitacost
$ 24.99
Report prices

Analysis

The 100 mg caffeine amount can provide a moderate lift in alertness and exercise drive, while 400 mg green tea extract and 125 mcg chromium add metabolic support. Black pepper, ginger, and bitter orange broaden the thermogenic design.

Important active amounts are missing, including EGCG, synephrine, gingerols, and EPA plus DHA from the fish oil. A proprietary fat-metabolizer blend and malformed label entries further reduce confidence in dose quality and transparency.

The product best fits stimulant-tolerant adults seeking a daytime metabolism formula rather than focused fish oil, green tea, or cognitive support. Caffeine combined with bitter-orange synephrine may increase jitteriness, heart rate, blood pressure, and sleep disruption.

Who is it for
  • Stimulant-tolerant adults seeking metabolic support
  • People wanting a daytime thermogenic formula
  • Users able to avoid additional stimulant sources
Best for
  • Short-term alertness
  • Stimulant-based metabolism support
  • Daytime weight-management routines

Pros

  • Clearly states 100 mg caffeine
  • Includes a substantial total green tea extract amount
  • Covers several metabolic pathways

Cons

  • EGCG and synephrine amounts are missing
  • Fish oil lacks EPA and DHA disclosure
  • Proprietary blend and malformed entries weaken transparency

Warnings

  • Caffeine plus bitter-orange synephrine may raise heart rate or blood pressure and is a poor fit for cardiovascular concerns
  • Combining it with coffee, energy drinks, or pre-workouts may cause excessive stimulation
  • Late-day use may worsen sleep, anxiety, or next-day fatigue

Nutrient quality

60 Moderate impact

Several ingredients use potentially useful forms, but key active markers and source details are missing. Caffeine is meaningfully dosed, while green tea, bitter orange, and fish oil cannot be judged at the active-compound level.

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Ingredient transparency

36 Lower impact

Caffeine, green tea extract, fish oil, chromium, and blend totals are shown, but several decisive active compounds lack amounts. The supplied data also contains blank names, invalid units, and no complete inactive ingredient list.

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Customer satisfaction

66 High impact

The aggregate satisfaction measure and review volume provide a useful first impression. Missing firsthand feedback leaves repeat complaints and real-world purpose fit uncertain.

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Value for money

48 Lower impact

The moderate serving cost is difficult to justify without quantified green-tea, bitter-orange, and fish-oil actives. Each serving offers limited quality-adjusted value despite a useful caffeine amount.

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Report analysis

Goals

Metabolism Boost
Metabolism Boost
Impact
High effect
B+ Goal FitC Strength of SupportB CoverageB- Formula Quality
Green Tea · 400 mgCaffeine · 100 mg

Green tea, caffeine, chromium, and bitter orange cover thermogenesis and glucose control, giving the formula a strong metabolism-focused design. The 100 mg caffeine amount is moderate, but EGCG and synephrine amounts are not disclosed.

Missing active-marker doses prevent a confident judgment of potency or stimulant load. Combining caffeine with synephrine-bearing bitter orange may raise heart rate or blood pressure, especially in stimulant-sensitive users or when taken with other stimulants.

Study evidence
Caffeine Disputed 40 studies
Chromium Supportive 47 studies
Green Tea Supportive 31 studies
Energy
Energy
Impact
High effect
A- Goal FitC+ Strength of SupportC+ CoverageD+ Formula Quality
Fish Oil · 851 mgCaffeine · 100 mg

A 100 mg caffeine dose provides moderate acute alertness, while green tea and chromium add metabolic context. Fish oil could support mitochondrial health, but active EPA and DHA amounts are not disclosed.

Bitter orange supplies an undisclosed synephrine load, making the stimulant effect less predictable. Combining caffeine with synephrine may raise heart rate or blood pressure and can be poorly suited to stimulant-sensitive users.

Study evidence
Caffeine Supportive 68 studies
Fish Oil Disputed 8 studies
Cognitive Support
Cognitive Support
Impact
Moderate effect
B Goal FitC+ Strength of SupportC- CoverageD- Formula Quality
Green Tea · 400 mg

Green tea and caffeine can support acute alertness and antioxidant defense. The product is built for fat metabolism, and the undisclosed fish-oil actives and stimulant blend weaken its cognitive fit.

Caffeine is clearly active, but synephrine and several blend components lack amounts. Combining caffeine with bitter-orange synephrine may increase jitteriness, heart rate, blood pressure, and sleep disruption.

Study evidence
Green Tea Supportive 32 studies
Productivity Boost
Productivity Boost
Impact
Moderate effect
B Goal FitC+ Strength of SupportC CoverageD- Formula Quality
Caffeine · 100 mg

Caffeine and green tea may improve alertness and task initiation, with fish oil offering slower foundational support. The 100 mg caffeine amount is moderate, but the product is built around fat metabolism rather than focused productivity.

A proprietary blend and unquantified synephrine obscure the full stimulant load, while EPA and DHA are not disclosed separately. Combining caffeine with bitter-orange synephrine may raise heart rate and blood pressure or worsen anxiety and sleep.

Study evidence
Caffeine Supportive 108 studies
Weight Loss
Weight Loss
Impact
Moderate effect
B- Goal FitD Strength of SupportC+ CoverageC- Formula Quality
Green Tea · 400 mgCaffeine · 100 mg

Green tea, 100 mg caffeine, bitter orange, chromium, and ginger target thermogenesis and metabolic support. Fish oil could support general metabolic health, but its EPA and DHA content is not disclosed.

EGCG and synephrine amounts are also missing, leaving two primary weight-loss actives impossible to judge. Combining caffeine with bitter orange may intensify heart-rate or blood-pressure effects, especially in stimulant-sensitive users.

Study evidence
Caffeine Disputed 14 studies
Chromium No effect 24 studies
Fish Oil Disputed 30 studies
Ginger Supportive 15 studies
Green Tea Supportive 42 studies
Anti-Aging
Anti-Aging
Impact
Moderate effect
C Goal FitC Strength of SupportC+ CoverageF Formula Quality
Green Tea · 400 mg

Green tea and fish oil offer antioxidant and metabolic support, but the product is built for fat burning. It provides 400 mg of green tea extract, fish oil, 100 mg of caffeine, and a stimulant fat-metabolizer blend for the stated purpose.

Fish-oil actives are not disclosed and the caffeine-synephrine design conflicts with restorative aging support. Combining 100 mg of caffeine with bitter-orange synephrine may raise heart rate and blood pressure.

Study evidence
Green Tea Supportive 9 studies

Ingredients

IngredientAmount per serving
Calories
15 Calorie(s)
Total Fat
1 Gram(s)
Cholesterol
5 mg
Total Carbohydrates
1 Gram(s)
Protein
1 Gram(s)
Chromium
125 mcg
Fish Oil
851 mg
Green Tea extract
400 mg
Fat Metabolizer Blend
300 mg
Advantra Z Bitter Orange extract
0 NP
natural Caffeine
0 NP
Caffeine
100 mg
Bioperine Complex (Herb/Botanical)
6 mg
Bioperine Black Pepper extract
0 NP
Ginger extract
0 NP
Adults 18–50
Report overview
Caffeine · 0 NP OverallScore57
F Active Ingredient Quality & BioavailabilityA Dose, Safety & Label TransparencyC Value

The caffeine amount is directly stated and sits in the moderate target range. Its exact source and form are not identified, which limits confidence in source quality and release behavior. Bitter orange supplies synephrine without a clear amount, creating added stimulant uncertainty for sensitive users.

View ingredientView products
Green Tea · 400 mg OverallScore28
F Active Ingredient Quality & BioavailabilityD- Dose, Safety & Label TransparencyF Value

The green tea extract is not standardized to a specific EGCG amount. Black pepper extract may support absorption, and the formula clearly states its caffeine amount. Without quantified EGCG, dose adequacy and active-value efficiency cannot be verified.

View ingredientView products
Chromium · 125 mcg OverallScore19
F Active Ingredient Quality & BioavailabilityD- Dose, Safety & Label TransparencyF Value

The chemical form of chromium is not disclosed. The chromium amount is in the low supplemental range. The broader botanical formula does not provide a qualifying high-dose companion active for a value adjustment. The normalized chromium cost is very high.

View ingredientView products
Loading alternative details
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Total War Tiger's Blood

Redcon1
<p>Citrulline malate, beta-alanine, agmatine, taurine, and a strong multi-source stimulant blend create a potent pre-workout formula. Compared with Green Tea Fat Metabolizer, its more coherent or better-characterized ingredients may address the original’s undisclosed EGCG, synephrine, EPA, and DHA amounts more effectively, although its stated limitations remain relevant.</p>
70 Performance

Green Tea Fat Metabolizer

Irwin Naturals
<p>Green tea extract, EGCG, moderate caffeine, fish oil, and chromium create a coherent metabolism-support formula. Compared with Green Tea Fat Metabolizer, its more coherent or better-characterized ingredients may address the original’s undisclosed EGCG, synephrine, EPA, and DHA amounts more effectively, although its stated limitations remain relevant.</p>
83 Performance

TheanineUP Focused Energy

California Gold Nutrition
<p>A balanced theanine and caffeine pairing supports alert focus, with cocoa and matcha adding mild complementary stimulation. Compared with Green Tea Fat Metabolizer, its more coherent or better-characterized ingredients may address the original’s undisclosed EGCG, synephrine, EPA, and DHA amounts more effectively, although its stated limitations remain relevant.</p>
69 Budget

Triple-Tea Fat Burner

Irwin Naturals
<p>A clearly stated moderate caffeine amount and three tea extracts provide a practical mild energy and focus effect at low serving cost. Its lower recurring cost improves accessibility versus Green Tea Fat Metabolizer, while the stated limitations still matter when choosing a daily formula.</p>
59 Budget

Super HD

Cellucor
<p>Caffeine and a branded green tea phytosome provide a clear stimulant core at a low serving cost. Its lower recurring cost improves accessibility versus Green Tea Fat Metabolizer, while the stated limitations still matter when choosing a daily formula.</p>
66 Budget

Green Tea Fat Burner

Applied Nutrition
<p>The formula combines a concentrated green tea extract with a moderate stimulant dose, but two vaguely named additions limit confidence in the complete blend. Its lower recurring cost improves accessibility versus Green Tea Fat Metabolizer, while the stated limitations still matter when choosing a daily formula.</p>
71 Value

Rapidcuts Shredded

ALLMAX
<p>A substantial multi-source caffeine dose provides the clearest energy and thermogenic effect, while many botanical additions are too small or poorly quantified to contribute much independently. Compared with Green Tea Fat Metabolizer, a lower recurring cost and clearer practical strengths improve the quality-to-cost trade-off, with the stated formula gaps as the main limitation.</p>
62 Value

Green Tea Fat Burner

Applied Nutrition
<p>The formula combines a concentrated green tea extract with a moderate stimulant dose, but two vaguely named additions make its full purpose hard to judge. Compared with Green Tea Fat Metabolizer, a lower recurring cost and clearer practical strengths improve the quality-to-cost trade-off, with the stated formula gaps as the main limitation.</p>
52 Value

Ripped Fuel Extreme

Twinlab
<p>The stimulant blend may support short-term energy, but several overlapping caffeine and cocoa entries make total exposure hard to judge. Compared with Green Tea Fat Metabolizer, a competitive ingredient profile and clearer practical strengths improve the quality-to-cost trade-off, with the stated formula gaps as the main limitation.</p>
Report alternatives

Sources

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

  1. 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
  2. Caffeine administration at night during extended wakefulness effectively mitigates performance impairment but not subjective assessments of fatigue and sleepiness.
    Paech GM; Banks S; Pajcin M; Grant C; Johnson K; Kamimori GH; Vedova CB · Pharmacology, biochemistry, and behavior · 2017
    Randomized trial24 participantsEnergy forCaffeine
  3. Caffeine Supplementation and Physical Performance, Muscle Damage and Perception of Fatigue in Soccer Players: A Systematic Review.
    Mielgo-Ayuso J; Calleja-Gonzalez J; Del Coso J; Urdampilleta A; León-Guereño P; Fernández-Lázaro D · Nutrients · 2019
    Systematic review17 participants17 studies pooledEnergy forCaffeine
  4. A critical review of caffeine withdrawal: empirical validation of symptoms and signs, incidence, severity, and associated features.
    Juliano LM; Griffiths RR · Psychopharmacology · 2005
    Systematic review66 studies pooledEnergy forCaffeine
  5. 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
  6. Acute Effects of Caffeine Supplementation on Physical Performance, Physiological Responses, Perceived Exertion, and Technical-Tactical Skills in Combat Sports: A Systematic Review and Meta-Analysis.
    Delleli S; Ouergui I; Messaoudi H; Trabelsi K; Ammar A; Glenn JM; Chtourou H · Nutrients · 2022
    Meta-analysis26 studies pooledFitness forCaffeine
  7. 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 participantsFitness forCaffeine
  8. Systematic review and meta-analysis of the efficacy and safety of chromium supplementation in diabetes.
    Suksomboon N; Poolsup N; Yuwanakorn A · Journal of clinical pharmacy and therapeutics · 2015
    Meta-analysis25 studies pooledMetabolism Boost forChromium
  9. The Effects of Supplementation with Chromium on Insulin Resistance Indices in Women with Polycystic Ovarian Syndrome: A Systematic Review and Meta-Analysis of Randomized Clinical Trials.
    Heshmati J; Omani-Samani R; Vesali S; Maroufizadeh S; Rezaeinejad M; Razavi M; Sepidarkish M · Hormone and metabolic research = Hormon- und Stoffwechselforschung = Hormones et metabolisme · 2018
    Meta-analysis268 participants5 studies pooledMetabolism Boost forChromium
  10. Improved meta-analytic methods show no effect of chromium supplements on fasting glucose.
    Bailey CH · Biological trace element research · 2014
    Meta-analysis809 participants16 studies pooledMetabolism Boost forChromium
  11. Chromium supplementation in non-obese non-diabetic subjects is associated with a decline in insulin sensitivity.
    Masharani U; Gjerde C; McCoy S; Maddux BA; Hessler D; Goldfine ID; Youngren JF · BMC endocrine disorders · 2013
    Randomized trial31 participantsMetabolism Boost forChromium
  12. 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
  13. 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
  14. 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
  15. 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
  16. Effects of caffeine on energy metabolism, heart rate, and methylxanthine metabolism in lean and obese women.
    Bracco D; Ferrarra JM; Arnaud MJ; Jéquier E; Schutz Y · The American journal of physiology · 1995
    Clinical trial20 participantsMetabolism Boost forCaffeine
  17. Decaffeinated coffee improves insulin sensitivity in healthy men.
    Reis CEG; Paiva CLRDS; Amato AA; Lofrano-Porto A; Wassell S; Bluck LJC; Dórea JG; da Costa THM · The British journal of nutrition · 2019
    Randomized trial17 participantsMetabolism Boost forCaffeine
  18. Acute caffeine ingestion reduces insulin sensitivity in healthy subjects: a systematic review and meta-analysis.
    Shi X; Xue W; Liang S; Zhao J; Zhang X · Nutrition journal · 2017
    Meta-analysis7 studies pooledMetabolism Boost forCaffeine
  19. 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
  20. 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
  21. Can teatime increase one's lifetime?
    Nakachi K; Eguchi H; Imai K · Ageing research reviews · 2003
    Cohort studyAnti-Aging forGreen Tea
  22. 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
  23. 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
  24. Marine Omega-3 Supplementation and Cardiovascular Disease: An Updated Meta-Analysis of 13 Randomized Controlled Trials Involving 127 477 Participants.
    Hu Y; Hu FB; Manson JE · Journal of the American Heart Association · 2020
    Meta-analysis127,477 participants13 studies pooledCardiovascular Support forFish Oil
  25. Impact of omega-3 fatty acids on hypertriglyceridemia, lipidomics, and gut microbiome in patients with type 2 diabetes.
    Lu J; Liu R; Ren H; Wang S; Hu C; Shi Z; Li M; Liu W; Wan Q; Su Q; Li Q; Zheng H; Qu S; Yang F; Ji H; Lin H; Qi H; Wu X; Wu K; Chen Y; Xu Y; Xu M; Wang T; Zheng J; Ning G; Zheng R; Bi Y; Zhong H; Wang W · Med (New York, N.Y.) · 2025
    Randomized trial309 participantsCardiovascular Support forFish Oil
  26. A systematic review of fish-oil supplements for the prevention and treatment of hypertension.
    Campbell F; Dickinson HO; Critchley JA; Ford GA; Bradburn M · European journal of preventive cardiology · 2013
    Meta-analysis1,524 participants17 studies pooledCardiovascular Support forFish Oil
  27. Effects of fish oil-derived fatty acids on suboptimal cardiovascular health: A multicenter, randomized, double-blind, placebo-controlled trial.
    Zeng Q; Dong SY; Liu YP; Fu J; Shuai P; Zhao ZM; Li TX · Nutrition, metabolism, and cardiovascular diseases : NMCD · 2017
    Randomized trial422 participantsCardiovascular Support Weight Loss forFish Oil
  28. Effect of High-Dose Marine Omega-3 Fatty Acids on Atherosclerosis: A Systematic Review and Meta-Analysis of Randomized Clinical Trials.
    Sekikawa A; Cui C; Sugiyama D; Fabio A; Harris WS; Zhang X · Nutrients · 2020
    Meta-analysis6 studies pooledCardiovascular Support forFish Oil
  29. 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 participantsCardiovascular Support Weight Loss forGreen Tea
  30. The effects of green tea supplementation on cardiovascular risk factors: A systematic review and meta-analysis.
    Zamani M; Kelishadi MR; Ashtary-Larky D; Amirani N; Goudarzi K; Torki IA; Bagheri R; Ghanavati M; Asbaghi O · Frontiers in nutrition · 2023
    Meta-analysis55 studies pooledCardiovascular Support forGreen Tea
  31. 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 pooledCardiovascular Support forGreen Tea
  32. 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 pooledCardiovascular Support forGreen Tea
  33. Green tea consumption and risk of cardiovascular and ischemic related diseases: A meta-analysis.
    Pang J; Zhang Z; Zheng TZ; Bassig BA; Mao C; Liu X; Zhu Y; Shi K; Ge J; Yang YJ; Dejia-Huang; Bai M; Peng Y · International journal of cardiology · 2016
    Meta-analysis259,267 participants9 studies pooledCardiovascular Support forGreen Tea
  34. 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
  35. 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
  36. 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
  37. 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
  38. 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
  39. 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
  40. 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
  41. 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
  42. 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
  43. Omega-3 Fatty Acid Supplementation for 12 Weeks Increases Resting and Exercise Metabolic Rate in Healthy Community-Dwelling Older Females.
    Logan SL; Spriet LL · PloS one · 2016
    Randomized trial24 participantsEnergy forFish Oil
  44. Effects of fish oil during hemodialysis on nutritional status and quality of life: a randomized double-blinded trial.
    Zhang C; Ge C; Wang J; Sun D · Food & nutrition research · 2022
    Randomized trial103 participantsEnergy forFish Oil
  45. Supplementation of fish oil and olive oil in patients with rheumatoid arthritis.
    Berbert AA; Kondo CR; Almendra CL; Matsuo T; Dichi I · Nutrition (Burbank, Los Angeles County, Calif.) · 2005
    Randomized trial43 participantsEnergy forFish Oil
  46. DHA-rich Fish Oil Increases the Omega-3 Index and Lowers the Oxygen Cost of Physiologically Stressful Cycling in Trained Individuals.
    Hingley L; Macartney MJ; Brown MA; McLennan PL; Peoples GE · International journal of sport nutrition and exercise metabolism · 2018
    Randomized trial26 participantsEnergy forFish Oil
  47. Fish oil reduces heart rate and oxygen consumption during exercise.
    Peoples GE; McLennan PL; Howe PR; Groeller H · Journal of cardiovascular pharmacology · 2009
    Randomized trial16 participantsEnergy forFish Oil
  48. 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
  49. 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
  50. 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
  51. 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
  52. 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
  53. 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
  54. 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
  55. Effects of caffeine on mood and performance: a study of realistic consumption.
    Brice CF; Smith AP · Psychopharmacology · 2003
    Clinical trial24 participantsMental Focus forCaffeine
  56. 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
  57. Oolong tea increases metabolic rate and fat oxidation in men.
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