Product Image

Extra-Energy Thermo-Fuel Max Fat Burner

Irwin Naturals
4.3
★ ★ ★ ★ ★
(149 ratings)
Green Tea 300 mg
Chromium 100 mcg
EPA (Eicosapentaenoic Acid) 189 mg
Fish Oil 1050 mg
DHA 126 mg
Product Image
Score48
Green tea, EGCG, and caffeine drive the formula, while most supporting actives are modest or hidden. Undisclosed extra stimulant exposure and low omega-3 depth are major drawbacks.
How scoring works
Quantity:100 Softgel(s) • (33 servings)
Goals:

Score 48

Green tea, EGCG, and caffeine drive the formula, while most supporting actives are modest or hidden. Undisclosed extra stimulant exposure and low omega-3 depth are major drawbacks.
How scoring works
$21.10($0.63 per serving)
iHerb
$ 21.10
Pure Formulas
$ 27.99
Amazon
$ 31.00
Vitacost
$ 27.99
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Analysis

Green tea provides 150 mg EGCG, while the label states 75 mg caffeine for direct alertness and thermogenic support. EPA and DHA are separately disclosed, and chromium adds a modest glucose-metabolism component.

Carnitine, tyrosine, ginseng, and several other extras are too lightly dosed to drive the formula. Guarana, yerba mate, and other ingredients sit inside an energy complex without individual amounts, so total caffeine exposure may exceed the main caffeine line.

The softgels fit stimulant-tolerant adults who want a fat-burner approach centered on green tea. They are poorly aligned with long-term heart or cognitive support and should not be treated as a meaningful omega-3 supplement.

Who is it for
  • Stimulant-tolerant adults seeking a thermogenic formula
  • Users wanting green tea EGCG
  • People who can avoid other caffeine sources
Best for
  • Short-term stimulant energy
  • Green tea thermogenic support
  • Clearly disclosed EGCG intake

Pros

  • Discloses 150 mg EGCG
  • Lists separate EPA and DHA amounts
  • Uses small-fish oil sources

Cons

  • Energy complex hides additional stimulants
  • Carnitine, tyrosine, and ginseng are lightly dosed
  • Omega-3 amount is modest

Warnings

  • Guarana and yerba mate may add caffeine beyond the stated 75 mg, increasing the risk of jitters, anxiety, rapid heartbeat, higher blood pressure, or sleep disruption.
  • The fish oil makes the softgels unsuitable for people with fish allergy.
  • Combining the product with other caffeine sources can make total stimulant exposure difficult to predict.

Nutrient quality

54 Moderate impact

Fish oil, green tea, EGCG, and omega-3 fats are meaningful, but tyrosine, carnitine, ginseng, and many vitamins are lightly dosed. Caffeine may stack with undisclosed guarana, yerba mate, and other stimulants in the hidden energy complex.

Ingredient transparency

36 Lower impact

Some core actives have amounts, but many blank names, null quantities, and zero-dose entries obscure the formula. The Extra Energy Complex hides guarana, cayenne, eleuthero, and potentially other component doses.

Customer satisfaction

62 Moderate impact

The favorable rating is supported by a moderate review base. No review text is available to assess recurring complaints or firsthand results.

Value for money

43 Lower impact

Meaningful green tea and omega-3 fats provide some quality, but formula crowding weakens cost justification. Serving value is modest because many supporting actives are token doses or hidden.

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Goals

Energy
Energy
Impact
Moderate effect
B+ Goal FitC- Strength of SupportC- CoverageD Formula Quality
Vitamin B5 · 18 mgRiboflavin · 0.5 mgThiamin · 0.4 mgVitamin B12 · 1.5 mcgFish Oil · 1050 mgCaffeine · 75 mg

Green tea and 75 mg caffeine provide moderate alertness, but most supporting energy ingredients are underdosed. Carnitine, tyrosine, ginseng, and vitamin B12 appear at token amounts.

The caffeine amount is clear, while several botanical quantities or standardizations are missing. The formula relies on a long thermogenic stack without enough depth beyond caffeine.

Study evidence
Caffeine Supportive 68 studies
Mental Focus
Mental Focus
Impact
Moderate effect
B Goal FitD+ Strength of SupportC+ CoverageD+ Formula Quality
Vitamin B12 · 1.5 mcgCaffeine · 75 mg

Caffeine, green tea, and a small tyrosine amount create a direct alertness pathway. Eleuthero, ginseng, and other blend ingredients may add resilience, but their individual amounts are not disclosed.

Guarana and yerba mate can add caffeine beyond the stated amount, so total stimulant exposure is uncertain. Sensitive users may experience jitters, sleep disruption, or a rapid heartbeat, particularly when combining it with other caffeine sources.

Study evidence
Caffeine Supportive 128 studies
Eleuthero Disputed 3 studies
Anti-Inflammatory Support
Anti-Inflammatory Support
Impact
Moderate effect
B- Goal FitC- Strength of SupportC CoverageD+ Formula Quality
Fish Oil · 1050 mgVitamin E · 3.4 mgVitamin C · 8 mgGreen Tea · 300 mg

Green tea extract with 150 mg EGCG provides the clearest anti-inflammatory contribution. Fish oil adds EPA and DHA, but their combined 315 mg amount is too low for strong inflammation-resolution support.

Separate EPA, DHA, EGCG, and caffeine disclosure makes the main actives easy to judge. The 75 mg caffeine amount may cause jitters or sleep disruption in stimulant-sensitive users.

Study evidence
Fish Oil Supportive 68 studies
Green Tea Mixed 16 studies
Skin Health
Skin Health
Impact
Moderate effect
C Goal FitC Strength of SupportC CoverageD- Formula Quality
Vitamin C · 8 mgSelenium · 17 mcgGreen Tea · 300 mgVitamin E · 3.4 mg

Fish oil supplies 189 mg EPA and 126 mg DHA, while 150 mg EGCG adds a meaningful antioxidant pathway. These amounts may support skin-barrier lipids and oxidative defense, but they do not create a complete structural or hydration formula.

The product is designed for weight management and stimulation rather than skin health. Caffeine and several hidden stimulant herbs add off-goal complexity without improving the main skin pathways.

Study evidence
Green Tea Supportive 37 studies
Cognitive Support
Cognitive Support
Impact
Moderate effect
C- Goal FitD+ Strength of SupportC- CoverageD- Formula Quality
Thiamin · 0.4 mgVitamin B12 · 1.5 mcgEPA (Eicosapentaenoic Acid) · 189 mgGreen Tea · 300 mg

Green tea provides a clearly stated EGCG amount, and caffeine can support short-term alertness. EPA and DHA add modest structural support, while Eleuthero and tyrosine are present only as secondary ingredients.

The formula is primarily a fat burner, and several stimulant sources sit inside a blend without individual amounts. Caffeine-sensitive users may experience jitteriness or sleep disruption, especially because guarana and yerba mate may add undisclosed caffeine.

Study evidence
Eleuthero No effect 1 study
EPA (Eicosapentaenoic Acid) Supportive 24 studies
Green Tea Supportive 32 studies
Guarana Supportive 11 studies
Anti-Aging
Anti-Aging
Impact
Moderate effect
C- Goal FitD Strength of SupportC- CoverageF Formula Quality
Vitamin B12 · 1.5 mcgGreen Tea · 300 mg

Green tea EGCG and modest omega-3 fats address oxidative stress, metabolic signaling, and inflammation. The stimulant-heavy fat-burning design and many low-dose additions make it a weak fit for restorative healthy aging.

EGCG and total caffeine are partly disclosed, but the energy complex hides individual stimulant amounts and EPA and DHA remain modest. Caffeine from multiple sources may cause anxiety, rapid heartbeat, or sleep disruption, which works against a healthspan-focused routine.

Study evidence
Green Tea Supportive 9 studies

Ingredients

IngredientAmount per serving
Calories
20 Calorie(s)
Total Fat
1.5 Gram(s)
Cholesterol
5 mg
Total Carbohydrates
1 Gram(s)
Protein
1 Gram(s)
Vitamin C
8 mg
Vitamin E
3.4 mg
Thiamine
0.4 mg
Riboflavin
0.5 mg
Niacin
7 mg
Vitamin B12
1.5 mcg
Pantothenic Acid
18 mg
Calcium
30 mg
Selenium
17 mcg
Chromium
100 mcg
Fish Oil
1050 mg
Eicosapentaenoic Acid
189 mg
Docosahexaenoic Acid
126 mg
Green Tea Leaf Extract
300 mg
Epigallocatechin Gallate
150 mg
Extra Energy Complex
185 mg
Caffeine
75 mg
Eleuthero Root Extract
0 NP
Cayenne fruit extract
0 NP
Guarana seed extract
0 NP
Mate (Yerba Mate) extract
0 NP
Garcinia Fruit, Rind Extract
150 mg
Hydroxycitric Acid
75 mg
L-Carnitine
35 mg
L-Tyrosine
35 mg
Asian Ginseng root extract
30 mg
Spirulina, Powder
20 mg
BioPerine Complex
3 mg
BioPerine
0 NP
Ginger Rhizome Extract
0 NP
Adults 18–50 Women
Report overview
Green Tea · 300 mg OverallScore69
A- Active Ingredient Quality & BioavailabilityB Dose, Safety & Label TransparencyF Value

A clearly quantified EGCG dose and exact caffeine disclosure make the active profile easy to assess. Vitamin C and BioPerine support absorption, while the stated caffeine amount may matter for stimulant-sensitive users. Cost per target EGCG amount is high.

View ingredientView products
Chromium · 100 mcg OverallScore53
B- Active Ingredient Quality & BioavailabilityD- Dose, Safety & Label TransparencyD- Value

Chromium picolinate is a highly bioavailable organic form. The 100 mcg serving is below the preferred metabolic-support range, and the label gives only one chromium weight. The cost per standardized chromium amount is moderate, with meaningful companion actives improving the broader value. The 75 mg caffeine entry plus guarana and yerba mate may expose sensitive users to more stimulant activity than the main caffeine line suggests.

View ingredientView products
EPA (Eicosapentaenoic Acid) · 189 mg OverallScore34
F Active Ingredient Quality & BioavailabilityD Dose, Safety & Label TransparencyF Value

The EPA dose is low, although its balance over DHA suits an EPA-focused target. The unspecified molecular form, absent oil-stability details, and lack of contaminant-testing claims weaken quality confidence. The formula is also costly per gram of EPA, while its caffeine-containing stimulant blend may be unsuitable for caffeine-sensitive users.

View ingredientView products
Loading alternative details
87 Performance

Omega-3

Solgar
A substantial 1,008 mg EPA and 756 mg DHA provides far stronger omega-3 depth than the original, while mixed tocopherols add oxidation protection. It omits green tea, chromium, and stimulants, making it better suited to focused fatty-acid support rather than energy.
84 Performance

Mega EPA/DHA

Life Extension
Clearly stated EPA and DHA plus natural vitamin E offer a focused formula with much stronger fatty-acid depth. Removing the hidden energy blend reduces stimulant uncertainty, though fish source, oil form, and purity testing remain undisclosed.
84 Performance

Alaska Wild Fish Oil Mega Omega-3

21st Century
The serving supplies 965 mg EPA and 385 mg DHA, giving substantially more targeted omega-3 material with fewer unrelated additions. It avoids stacked stimulants but leaves molecular form, oxidation protection, species, and purity testing unclear.
76 Budget

Omega-3 Fish Oil 1000 mg Lemon

Natrol
The low serving cost and simple fish-oil formula avoid the original hidden stimulant blend while clearly listing EPA and DHA. Omega potency is modest and the product omits green tea and chromium, but it is far less complex for basic omega-3 use.
79 Budget

Omega-3 Fish Oil with Vitamin D 1000 mg Lemon Flavored

Swanson
A low recurring cost provides clearly listed EPA and DHA plus vitamin D3 without the original caffeine and guarana uncertainty. Its omega dose is modest, and it does not support the original stimulant-based energy goal.
70 Budget

Omega-3 Salmon Oil

Bluebonnet
A long supply and low serving cost provide simple fish oil with separately listed EPA and DHA. The dose is modest and oil-quality details are incomplete, but it avoids the original crowded blend and unclear total stimulant exposure.
83 Value

Super Omega-3

Life Extension
A substantial EPA-and-DHA serving combines with quantified olive and sesame antioxidants at a lower recurring cost. Four softgels are less convenient, but the formula offers more focused omega-3 value without an opaque stimulant complex.
80 Value

Ultra Omegas DHA/EPA

Country Life
The DHA-forward serving provides 500 mg DHA and 200 mg EPA with vitamin E at a lower serving cost. It lacks the original metabolism ingredients, yet delivers more clearly defined fatty acids without caffeine uncertainty.
82 Value

Extreme Omega 2400 mg Lemon Natural Flavor

Natrol
The formula provides 646 mg EPA and 430 mg DHA with natural vitamin E at a favorable serving cost. Fish source and molecular form remain unclear, but its concentrated, stimulant-free design offers stronger active value than the crowded original.
Report alternatives

Sources

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

  1. Green tea and coffee intake and risk of cognitive decline in older adults: the National Institute for Longevity Sciences, Longitudinal Study of Aging.
    Shirai Y; Kuriki K; Otsuka R; Kato Y; Nishita Y; Tange C; Tomida M; Imai T; Ando F; Shimokata H · Public health nutrition · 2021
    Cohort study1,305 participantsAnti-Aging forGreen Tea
  2. Associations of green tea, coffee, and soft drink consumption with longitudinal changes in leukocyte telomere length.
    Sohn I; Shin C; Baik I · Scientific reports · 2023
    Cohort study1,952 participantsAnti-Aging forGreen Tea
  3. Can teatime increase one's lifetime?
    Nakachi K; Eguchi H; Imai K · Ageing research reviews · 2003
    Cohort studyAnti-Aging forGreen Tea
  4. Influences of tea consumption on self-rated health and life satisfaction among older adults: Evidence from the CLHLS.
    Zou M; Sun C; Yang M; Li C; Wang S; Zheng D; Wang J; Yu L; Sun L; Wang Y; Chen H; Zeng Y · PsyCh journal · 2025
    Cohort study78,345 participantsAnti-Aging forGreen Tea
  5. Double-blinded, placebo-controlled trial of green tea extracts in the clinical and histologic appearance of photoaging skin.
    Chiu AE; Chan JL; Kern DG; Kohler S; Rehmus WE; Kimball AB · Dermatologic surgery : official publication for American Society for Dermatologic Surgery [et al.] · 2005
    Randomized trial40 participantsAnti-Aging forGreen Tea
  6. Dose-dependent effects of fish oil on cardio-metabolic biomarkers in healthy middle-aged and elderly Chinese people: a double-blind randomized controlled trial.
    Song J; Hu M; Li C; Yang B; Ding Q; Wang C; Mao L · Food & function · 2018
    Randomized trial201 participantsAnti-Inflammatory Support forFish Oil
  7. Eicosapentaenoic acid supplementation alleviates pruritus, enhances skin moisture, and mitigates depression in maintenance hemodialysis patients.
    Lin YL; Wang CL; Chiang TI · Frontiers in nephrology · 2024
    Randomized trial60 participantsAnti-Inflammatory Support forFish Oil
  8. Lowering effects of fish oil supplementation on proinflammatory markers in hypertension: results from a randomized controlled trial.
    Yang B; Ren XL; Li ZH; Shi MQ; Ding F; Su KP; Guo XJ; Li D · Food & function · 2020
    Randomized trial77 participantsAnti-Inflammatory Support forFish Oil
  9. The effects of ω-3 fish oil emulsion-based parenteral nutrition plus combination treatment for acute paraquat poisoning.
    Meng Z; Dong Y; Gao H; Yao D; Gong Y; Meng Q; Zheng T; Cui X; Su X; Tian Y · The Journal of international medical research · 2019
    Randomized trial174 participantsAnti-Inflammatory Support forFish Oil
  10. Effects of Omega-3 Fatty Acid Intake in Patients Undergoing Dialysis: A Systematic Review and Meta-Analysis of Randomized Controlled Trials.
    Liu R; Jiang J; Fu Z; Liu C; Yao L; Quan H · Journal of the American Nutrition Association · 2022
    Meta-analysis49 studies pooledAnti-Inflammatory Support forFish Oil
  11. 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
  12. 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
  13. 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
  14. 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
  15. 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
  16. No benefit adding eleutherococcus senticosus to stress management training in stress-related fatigue/weakness, impaired work or concentration, a randomized controlled study.
    Schaffler K; Wolf OT; Burkart M · Pharmacopsychiatry · 2014
    Randomized trial144 participantsCognitive Support Mental Focus forEleuthero
  17. Blood polyunsaturated omega-3 fatty acids, brain atrophy, cognitive decline, and dementia risk.
    Thomas A; Baillet M; Proust-Lima C; Féart C; Foubert-Samier A; Helmer C; Catheline G; Samieri C · Alzheimer's & dementia : the journal of the Alzheimer's Association · 2024
    Cohort study1,279 participantsCognitive Support forEPA (Eicosapentaenoic Acid)
  18. Thirteen-year prospective study between fish consumption, long-chain n-3 fatty acids intakes and cognitive function.
    Kesse-Guyot E; Péneau S; Ferry M; Jeandel C; Hercberg S; Galan P; SU.VI.MAX 2 Research Group · The journal of nutrition, health & aging · 2011
    Cohort study3,294 participantsCognitive Support forEPA (Eicosapentaenoic Acid)
  19. Serum ω-3 Fatty Acids and Cognitive Domains in Community-Dwelling Older Adults from the NuAge Study: Exploring the Associations with Other Fatty Acids and Sex.
    Duchaine CS; Fiocco AJ; Carmichael PH; Cunnane SC; Plourde M; Lampuré A; Allès B; Belleville S; Gaudreau P; Presse N; Ferland G; Laurin D · The Journal of nutrition · 2022
    Cross-sectional study386 participantsCognitive Support forEPA (Eicosapentaenoic Acid)
  20. Breast milk EPA associated with infant distractibility when EPA level is low.
    Jia K; Feng Y; Brenna JT; Luo ZC; Zhao J; Li H; Li P; Zhang Q; Zhao Q; Dai Q; Zhong Y; Lambers T; Zhang H; Zhou H; Gao Y · Nutrition (Burbank, Los Angeles County, Calif.) · 2021
    Cohort study120 participantsCognitive Support forEPA (Eicosapentaenoic Acid)
  21. Association of Red Blood Cell Omega-3 Fatty Acids With MRI Markers and Cognitive Function in Midlife: The Framingham Heart Study.
    Satizabal CL; Himali JJ; Beiser AS; Ramachandran V; Melo van Lent D; Himali D; Aparicio HJ; Maillard P; DeCarli CS; Harris WS; Seshadri S · Neurology · 2023
    Cross-sectional study2,183 participantsCognitive Support forEPA (Eicosapentaenoic Acid)
  22. 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
  23. 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
  24. 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
  25. 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
  26. 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
  27. Cognitive effects of guarana supplementation with maximal intensity cycling.
    Gurney T; Bradley N; Izquierdo D; Ronca F · The British journal of nutrition · 2023
    Randomized trial25 participantsCognitive Support forGuarana
  28. Cognitive Performance Enhancement Induced by Caffeine, Carbohydrate and Guarana Mouth Rinsing during Submaximal Exercise.
    Pomportes L; Brisswalter J; Casini L; Hays A; Davranche K · Nutrients · 2018
    Randomized trial24 participantsCognitive Support forGuarana
  29. Improved cognitive performance in human volunteers following administration of guarana (Paullinia cupana) extract: comparison and interaction with Panax ginseng.
    Kennedy DO; Haskell CF; Wesnes KA; Scholey AB · Pharmacology, biochemistry, and behavior · 2005
    Non-randomized trial28 participantsCognitive Support forGuarana
  30. The effect of plant active substances on cognitive function in healthy older adults: a systematic review and network meta-analysis of randomized controlled trials.
    Feng X; Fan S; Wei F · Frontiers in pharmacology · 2026
    Meta-analysis1,861 participants25 studies pooledCognitive Support forGuarana
  31. Effect of Guarana (Paullinia cupana) on Cognitive Performance: A Systematic Review and Meta-Analysis.
    Hack B; Penna EM; Talik T; Chandrashekhar R; Millard-Stafford M · Nutrients · 2023
    Meta-analysis328 participants8 studies pooledCognitive Support forGuarana
  32. 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
  33. 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
  34. 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
  35. 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
  36. 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
  37. 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
  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. Evidence-based efficacy of adaptogens in fatigue, and molecular mechanisms related to their stress-protective activity.
    Panossian A; Wikman G · Current clinical pharmacology · 2009
    Narrative reviewMental Focus forEleuthero
  43. Stimulating effect of adaptogens: an overview with particular reference to their efficacy following single dose administration.
    Panossian A; Wagner H · Phytotherapy research : PTR · 2005
    Narrative reviewMental Focus forEleuthero
  44. 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
  45. 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
  46. 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
  47. 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