Product Image

A:Cuts Amino-Charged Energy Drink Sweet Tea

ALLMAX
4.7
★ ★ ★ ★ ★
(165 ratings)
Alanine 500 mg
Caffeine 127 mg
Glycine 345 mg
Taurine 2000 mg
Lysine 300 mg
L-Carnitine 500 mg
Glutamine 250 mg
Product Image
Score65
A moderate energy drink mix with useful taurine and manageable listed caffeine. The broad amino label is much less impressive because most amounts are small.
How scoring works
Quantity:210 Gram(s) • (30 servings)
Goals:
Fitness
Energy
Metabolism Boost
Productivity Boost
Weight Loss
General Health
Cardiovascular Support
Anti-Aging

Score 65

A moderate energy drink mix with useful taurine and manageable listed caffeine. The broad amino label is much less impressive because most amounts are small.
How scoring works

Also available as

6 options
Orange 7 Gram(s) • 210 Gram(s) • 30 servings $15.60 ($0.52 per serving) Blue Raspberry 7 Gram(s) • 210 Gram(s) • 30 servings $17.96 ($0.59 per serving) Goji Berry 7 Gram(s) • 210 Gram(s) • 30 servings $17.96 ($0.59 per serving) Pina Colada 7 Gram(s) • 210 Gram(s) • 30 servings $17.99 ($0.59 per serving) Pink Lemonade 7 Gram(s) • 210 Gram(s) • 30 servings $17.99 ($0.59 per serving) Grape 7 Gram(s) • 210 Gram(s) • 30 servings $17.98 ($0.59 per serving)
$21.36($0.71 per serving)
iHerb
$ 21.36
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Analysis

Natural caffeine from coffee extract provides 127 mg, paired with 2 g taurine and 500 mg carnitine tartrate. That combination can support a noticeable but more moderate energy effect than high-stimulant pre-workouts.

The BCAA blend totals only 725 mg, and glutamine, lysine, glycine, alanine, phenylalanine, histidine, and threonine are individually modest. Green coffee extract adds chlorogenic-acid content, but its additional caffeine contribution is not stated.

The powder works best as a low-calorie energy drink with taurine rather than a complete amino or recovery product. Users relying on it for muscle support would need adequate protein and more meaningful essential-amino-acid intake elsewhere.

Who is it for
  • Adults seeking moderate workout or daytime energy
  • People who want taurine with caffeine
  • Users not relying on the product as their main amino source
Best for
  • Moderate energy and focus
  • A low-calorie workout drink
  • Taurine-supported stimulation

Pros

  • Provides 2 g taurine
  • Uses a moderate 127 mg listed caffeine amount
  • Includes 500 mg carnitine tartrate
  • Clearly lists most individual amino-acid amounts

Cons

  • BCAA blend is only 725 mg
  • Most amino acids are too small for robust recovery support
  • Green coffee may add unquantified caffeine
  • Carnitine amount is modest

Warnings

  • Green coffee extract may add caffeine beyond the stated 127 mg, so total stimulant exposure is not fully defined
  • Avoid combining with other stimulant products until personal tolerance is known
  • Take early enough to prevent caffeine-related sleep disruption
  • Phenylalanine makes the product unsuitable for people with phenylketonuria

Nutrient quality

63 Moderate impact

Taurine and moderate caffeine provide useful energy support. The BCAA blend is opaque and most other amino acids are token additions.

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Ingredient transparency

71 High impact

Individual ingredient weights make the formula broadly readable. Missing active-marker yields and non-active ingredient details reduce full transparency.

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Customer satisfaction

66 High impact

The supplied rating is favorable, but the feedback base is comparatively small. No complaint-level evidence was supplied to assess recurring issues or purpose-specific experiences.

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Value for money

58 Moderate impact

The serving cost is moderate relative to the formula. Incomplete potency details keep the quality-to-cost balance from standing out.

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Report analysis

Goals

Fitness
Fitness
Impact
Highest effect
A- Goal FitA- Strength of SupportB+ CoverageA- Formula Quality
Caffeine · 127 mg

Caffeine, taurine, carnitine tartrate, and amino acids support alertness and selected training functions. Taurine and caffeine reach useful amounts, creating a clear pre-workout energy effect.

Carnitine and the branched-chain amino acids are modest, so recovery and metabolic support are less convincing than stimulation. Caffeine can disrupt sleep or cause jitters in sensitive users, especially with additional stimulant intake.

Study evidence
Caffeine Supportive 255 studies
L-Carnitine Supportive 52 studies
Taurine Supportive 21 studies
Energy
Energy
Impact
Highest effect
A Goal FitA- Strength of SupportB+ CoverageB Formula Quality
Caffeine · 127 mg

A moderate caffeine dose provides direct alertness while taurine and carnitine add workout-oriented metabolic support. Taurine reaches a meaningful amount and every principal active is individually listed.

Carnitine and the amino-acid blend are modest compared with common focused doses, and the BCAA blend does not disclose its individual amino-acid ratios. Using two scoops doubles the caffeine exposure and may disrupt sleep or cause jitters in caffeine-sensitive users.

Study evidence
Caffeine Supportive 68 studies
Metabolism Boost
Metabolism Boost
Impact
Highest effect
A- Goal FitB- Strength of SupportB CoverageA- Formula Quality
Caffeine · 127 mg

Caffeine directly raises short-term energy expenditure, while carnitine, green coffee, and taurine broaden energy and exercise support. Caffeine is well dosed, but carnitine is modest and the green coffee extract lacks enough standardization detail to judge metabolic potency.

The focused stimulant-plus-amino-acid design is coherent and avoids a crowded thermogenic blend. Caffeine may cause insomnia, jitteriness, or a faster heartbeat, especially when used late or combined with other caffeine sources.

Study evidence
Caffeine Disputed 40 studies
Taurine Supportive 11 studies
Productivity Boost
Productivity Boost
Impact
High effect
B+ Goal FitB Strength of SupportB- CoverageC+ Formula Quality
Caffeine · 127 mg

A clearly disclosed caffeine amount should provide reliable short-term alertness. Taurine and carnitine add an energy-oriented supporting layer.

Caffeine is the main productivity active, while the BCAA and amino-acid blend is more relevant to exercise. Caffeine-sensitive users may experience restlessness or sleep disruption, especially with later use.

Study evidence
Caffeine Supportive 108 studies
Weight Loss
Weight Loss
Impact
High effect
B- Goal FitB- Strength of SupportC CoverageC+ Formula Quality
Caffeine · 127 mg

A clearly stated caffeine amount may modestly raise energy expenditure and support workout effort. Taurine and amino acids broaden the exercise focus, while green coffee and carnitine add less certain weight-management value.

Carnitine and the branched-chain amino-acid blend are below amounts usually chosen for focused performance or muscle preservation. The caffeine amount can disturb sleep or cause jitteriness in sensitive users, especially when combined with other stimulants.

Study evidence
Caffeine Disputed 14 studies
General Health
General Health
Impact
High effect
C+ Goal FitC+ Strength of SupportC- CoverageC+ Formula Quality
Glycine · 345 mgTaurine · 2000 mg

The formula offers a substantial taurine amount within a clearly energy-oriented blend. Its general-health relevance is meaningful but narrow compared with a broad nutrient formula.

Glycine and several added amino acids are present in modest quantities, while the amino-acid blend remains partly opaque. Natural caffeine may cause jitteriness or sleep disruption in people who are stimulant-sensitive.

Study evidence
Glycine Supportive 4 studies
Taurine No effect 3 studies

Ingredients

IngredientAmount per serving
Calories
5 Calorie(s)
Total Carbohydrates
1 Gram(s)
Calcium (Calcium Silicate)
 25 mg
L-Carnitine Tartrate
500 mg
Caffeine, Natural (Coffea robusta Bean Extract)
 127 mg
Green Coffee Bean Extract (Chlorogenic Acid)
 125 mg
Taurine
2000 mg
ACUTS BCAAs
725 mg
L-Alanine
500 mg
L-Glycine
345 mg
L-Lysine Hydrochloride
300 mg
L-Glutamine
250 mg
L-Phenylalanine
50 mg
L-Histidine Hydrochloride
50 mg
L-Threonine
50 mg
Gluten Free Adults 18–50 Sugar Free
Report overview
Alanine · 500 mg OverallScore90
A+ Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyD+ Value

The powder clearly identifies 500 mg of standalone L-alanine, confirming the relevant isomer and a high-potency amount. Individual dose disclosure supports reliable comparison within the broader amino-energy formula. Natural caffeine adds 127 mg of stimulant exposure, and the optional second scoop could double that exposure.

View ingredientView products
Caffeine (Coffea robusta Bean Extract) · 127 mg OverallScore68
D- Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyC Value

Natural coffee-bean caffeine provides a clearly stated, effective amount, but the source is not standardized and uses no advanced release technology. The single disclosed caffeine amount supports straightforward dosing, with no high-potency secondary stimulant listed. Pricing is typical for the collection and offers fair value.

View ingredientView products
Glycine · 345 mg OverallScore61
D+ Active Ingredient Quality & BioavailabilityC+ Dose, Safety & Label TransparencyB- Value

The powder provides standard L-glycine in a readily mixed format, but the amount is far below a typical high-dose glycine serving. Taurine, carnitine, amino acids, and caffeine make it an energy formula rather than a practical glycine supplement. Its 127 mg of caffeine limits dose escalation and may disrupt sleep or cause jitteriness in sensitive users.

View ingredientView products
Loading alternative details
66 Performance

Amino:Cuts Amino-Charged Energy Drink Pink Lemonade

ALLMAX
No meaningful ingredient advantage is shown because the flavor variant uses the same disclosed active profile. Taurine and moderate caffeine remain the useful core, while the opaque BCAA blend and token amino-acid additions keep the same limitations.
66 Performance

Amino:Cuts Amino-Charged Energy Drink Goji Berry

ALLMAX
No meaningful ingredient advantage is shown because the flavor variant uses the same disclosed active profile. Taurine and moderate caffeine remain the useful core, while the opaque BCAA blend and token amino-acid additions keep the same limitations.
66 Budget

Amino:Cuts Amino-Charged Energy Drink Blue Raspberry

ALLMAX
Lower routine cost makes the flavor variant a more economical option. The disclosed taurine, caffeine, opaque BCAA blend, and lightly dosed amino acids otherwise show no material formulation advantage.
66 Budget

Amino:Cuts Amino-Charged Energy Drink Pina Colada

ALLMAX
Lower routine cost makes the flavor variant a more economical option. The disclosed taurine, caffeine, opaque BCAA blend, and lightly dosed amino acids otherwise show no material formulation advantage.
66 Value

Amino:Cuts Amino-Charged Energy Drink Orange

ALLMAX
Comparable routine cost and the same disclosed active profile make the flavor variant similar in value rather than clearly better. Taurine and moderate caffeine remain useful, but the opaque BCAA blend prevents a stronger value conclusion.
65 Value

Amino: Cuts Amino-Charged Energy Drink Grape

ALLMAX
Comparable routine cost and the same disclosed active profile make the flavor variant similar in value rather than clearly better. Taurine and moderate caffeine remain useful, but the opaque BCAA blend prevents a stronger value conclusion.
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. 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
  4. Effects of nine weeks L-Carnitine supplementation on exercise performance, anaerobic power, and exercise-induced oxidative stress in resistance-trained males.
    Koozehchian MS; Daneshfar A; Fallah E; Agha-Alinejad H; Samadi M; Kaviani M; Kaveh B M; Jung YP; Sablouei MH; Moradi N; Earnest CP; Chandler TJ; Kreider RB · Journal of exercise nutrition & biochemistry · 2020
    Randomized trial23 participantsFitness forL-Carnitine
  5. Acute L-Carnitine Supplementation Does Not Improve CrossFit® Performance: A Randomized, Double-Blind, Placebo-Controlled Crossover Study.
    Devrim-Lanpir A; Velasco LS; Ramirez Lara FG; Ojeda Sanchez A; Kimble R; Zare R; Gunes FE; Knechtle B; Weiss K; Rosemann T; Heinrich K · Nutrients · 2025
    Randomized trial20 participantsFitness forL-Carnitine
  6. The Effects of L-Carnitine Supplementation on Weight Loss, Glycemic Control, and Cardiovascular Risk Factors in Patients With Type 2 Diabetes: A Systematic Review and Dose-response Meta-Analysis of Randomized Controlled Trials.
    Mirrafiei A; Jayedi A; Shab-Bidar S · Clinical therapeutics · 2024
    Meta-analysis2,041 participants21 studies pooledCardiovascular Support forL-Carnitine
  7. Effective dosing of L-carnitine in the secondary prevention of cardiovascular disease: a systematic review and meta-analysis.
    Shang R; Sun Z; Li H · BMC cardiovascular disorders · 2015
    Meta-analysis3,108 participants5 studies pooledCardiovascular Support forL-Carnitine
  8. Intestinal microbiota metabolism of L-carnitine, a nutrient in red meat, promotes atherosclerosis.
    Koeth RA; Wang Z; Levison BS; Buffa JA; Org E; Sheehy BT; Britt EB; Fu X; Wu Y; Li L; Smith JD; DiDonato JA; Chen J; Li H; Wu GD; Lewis JD; Warrier M; Brown JM; Krauss RM; Tang WH; Bushman FD; Lusis AJ; Hazen SL · Nature medicine · 2013
    Other2,595 participantsCardiovascular Support forL-Carnitine
  9. Accelerated biological aging, mediating amino acids, and risk of incident type 2 diabetes: a prospective cohort study.
    Zhang Z; Wang J; Yu B; Sun Y; Chen Y; Lu Y; Wang N; Xia F · Journal of endocrinological investigation · 2025
    Cohort study95,773 participantsAnti-Aging forGlycine
  10. Dietary protein and amino acid intakes for mitigating sarcopenia in humans.
    He W; Connolly ED; Cross HR; Wu G · Critical reviews in food science and nutrition · 2025
    Narrative reviewAnti-Aging forGlycine
  11. Age-Related Neurochemical Changes in the Vestibular Nuclei.
    Smith PF · Frontiers in neurology · 2016
    Narrative reviewAnti-Aging forGlycine
  12. SHMT2 regulates CD8+ T cell senescence via the reactive oxygen species axis in HIV-1 infected patients on antiretroviral therapy.
    Zhang QS; Wang JN; Yang TL; Li SY; Li JQ; Liu DN; Shang H; Zhang ZN · EBioMedicine · 2025
    Observational studyAnti-Aging forGlycine
  13. Metabolomics and incident dementia in older Chinese adults: The Shanghai Aging Study.
    Cui M; Jiang Y; Zhao Q; Zhu Z; Liang X; Zhang K; Wu W; Dong Q; An Y; Tang H; Ding D; Chen X · Alzheimer's & dementia : the journal of the Alzheimer's Association · 2021
    Cohort studyAnti-Aging forGlycine
  14. Taurine supplementation reduces myeloperoxidase and matrix-metalloproteinase-9 levels and improves the effects of exercise in cognition and physical fitness in older women.
    Chupel MU; Minuzzi LG; Furtado GE; Santos ML; Ferreira JP; Filaire E; Teixeira AM · Amino acids · 2021
    Randomized trial48 participantsAnti-Aging forTaurine
  15. Taurine as a possible antiaging therapy: A controlled clinical trial on taurine antioxidant activity in women ages 55 to 70.
    Abud GF; De Carvalho FG; Batitucci G; Travieso SG; Bueno Junior CR; Barbosa Junior F; Marchini JS; de Freitas EC · Nutrition (Burbank, Los Angeles County, Calif.) · 2022
    Randomized trial24 participantsAnti-Aging forTaurine
  16. Association of taurine intake with changes in physical fitness among community-dwelling middle-aged and older Japanese adults: an 8-year longitudinal study.
    Domoto T; Kise K; Oyama Y; Furuya K; Kato Y; Nishita Y; Kozakai R; Otsuka R · Frontiers in nutrition · 2024
    Cohort studyAnti-Aging forTaurine
  17. Glycine treatment decreases proinflammatory cytokines and increases interferon-gamma in patients with type 2 diabetes.
    Cruz M; Maldonado-Bernal C; Mondragón-Gonzalez R; Sanchez-Barrera R; Wacher NH; Carvajal-Sandoval G; Kumate J · Journal of endocrinological investigation · 2009
    Randomized trial74 participantsAnti-Inflammatory Support forGlycine
  18. Effect of oral glycine on the clinical, spirometric and inflammatory status in subjects with cystic fibrosis: a pilot randomized trial.
    Vargas MH; Del-Razo-Rodríguez R; López-García A; Lezana-Fernández JL; Chávez J; Furuya MEY; Marín-Santana JC · BMC pulmonary medicine · 2018
    Randomized trial13 participantsAnti-Inflammatory Support forGlycine
  19. Subgingival air polishing (glycine powder) versus minocycline hydrochloride: efficacy in residual periodontal pockets following endoscope-assisted scaling and root planing.
    Guo X; Bai H; Lu X; Guo J; Qi Y; Huo X; Li S · Clinical oral investigations · 2026
    Randomized trial80 participantsAnti-Inflammatory Support forGlycine
  20. Long-term Implant Maintenance: A Systematic Review of Home and Professional Care Strategies in Supportive Implant Therapy.
    Araújo TG; Moreira CS; Neme RA; Luan H; Bertolini M · Brazilian dental journal · 2024
    Systematic review13 studies pooledAnti-Inflammatory Support forGlycine
  21. Analysis of the factors influencing the occurrence of peri-implantitis in patients with implant-supported restoration and study on the maintenance effect of subgingival sandblasting.
    Pan T; Meng W; Zhang M; Xie Y; Chen Z; Zhou M; Yin L; Xie H · BMC oral health · 2026
    Randomized trial198 participantsAnti-Inflammatory Support forGlycine
  22. Oxidative stress and inflammation in obesity after taurine supplementation: a double-blind, placebo-controlled study.
    Rosa FT; Freitas EC; Deminice R; Jordão AA; Marchini JS · European journal of nutrition · 2015
    Randomized trial24 participantsAnti-Inflammatory Support forTaurine
  23. Effect of taurine supplementation on preventing ventilator-associated pneumonia in pediatrics under mechanical ventilation, a randomized controlled double-blind clinical trial.
    Shirzad-Yazdi N; Shorafa E; Abootalebi SN; Heidari R; Hojabri K; Doostfatemeh M; Masjedi F; Vazin A; Shafiekhani M · Frontiers in pediatrics · 2025
    Randomized trial77 participantsAnti-Inflammatory Support forTaurine
  24. Effect of taurine in muscle damage markers and inflammatory cytokines in running exercise.
    Wang Y; Xu T; Zhao H; Gu C; Li Z · Frontiers in physiology · 2022
    Non-randomized trial10 participantsAnti-Inflammatory Support forTaurine
  25. Exercise and taurine in inflammation, cognition, and peripheral markers of blood-brain barrier integrity in older women.
    Chupel MU; Minuzzi LG; Furtado G; Santos ML; Hogervorst E; Filaire E; Teixeira AM · Applied physiology, nutrition, and metabolism = Physiologie appliquee, nutrition et metabolisme · 2018
    Randomized trial48 participantsAnti-Inflammatory Support forTaurine
  26. Taurine supplementation has anti-atherogenic and anti-inflammatory effects before and after incremental exercise in heart failure.
    Ahmadian M; Roshan VD; Aslani E; Stannard SR · Therapeutic advances in cardiovascular disease · 2017
    Randomized trialAnti-Inflammatory Support forTaurine
  27. L-Carnitine supplementation reduces oxidized LDL cholesterol in patients with diabetes.
    Malaguarnera M; Vacante M; Avitabile T; Malaguarnera M; Cammalleri L; Motta M · The American journal of clinical nutrition · 2009
    Randomized trial81 participantsCardiovascular Support forL-Carnitine
  28. L-Carnitine's Effect on the Biomarkers of Metabolic Syndrome: A Systematic Review and Meta-Analysis of Randomized Controlled Trials.
    Choi M; Park S; Lee M · Nutrients · 2021
    Meta-analysis9 studies pooledCardiovascular Support forL-Carnitine
  29. The Effects of L-Carnitine on Echocardiographic Changes in Patients With β-Thalassemia Major and Intermedia.
    Shahidi M; Hashemi SR; Fattahi N; Roshani D; Vahedi S; Sharifi P; Moradveisi B · Journal of pediatric hematology/oncology · 2020
    Randomized trial60 participantsCardiovascular Support forL-Carnitine
  30. Efficacy and tolerability of combined treatment with L-carnitine and simvastatin in lowering lipoprotein(a) serum levels in patients with type 2 diabetes mellitus.
    Solfrizzi V; Capurso C; Colacicco AM; D'Introno A; Fontana C; Capurso SA; Torres F; Gadaleta AM; Koverech A; Capurso A; Panza F · Atherosclerosis · 2007
    Randomized trial52 participantsCardiovascular Support forL-Carnitine
  31. Taurine Supplementation Lowers Blood Pressure and Improves Vascular Function in Prehypertension: Randomized, Double-Blind, Placebo-Controlled Study.
    Sun Q; Wang B; Li Y; Sun F; Li P; Xia W; Zhou X; Li Q; Wang X; Chen J; Zeng X; Zhao Z; He H; Liu D; Zhu Z · Hypertension (Dallas, Tex. : 1979) · 2016
    Randomized trial120 participantsCardiovascular Support forTaurine
  32. Taurine ameliorates blood pressure and vascular function in patients with type 2 diabetes: Randomized, double-blind, placebo-controlled trial.
    Li Y; Wang Q; Liu Y; Li Q; Xia W; Lin S; Yang Q; Scholze A; Zhao Z; He H; Zhang H; Yan Z; Tepel M; Mu H; Zhu Z; Liu D · iScience · 2025
    Randomized trial165 participantsCardiovascular Support forTaurine
  33. Taurine reduces the risk for metabolic syndrome: a systematic review and meta-analysis of randomized controlled trials.
    Tzang CC; Chi LY; Lin LH; Lin TY; Chang KV; Wu WT; Özçakar L · Nutrition & diabetes · 2024
    Meta-analysis1,024 participants25 studies pooledCardiovascular Support forTaurine
  34. Effects of Oral Taurine Supplementation on Cardiometabolic Risk Factors: A Meta-analysis and Systematic Review of Randomized Clinical Trials.
    Nie Z; Liu Y; Zhang M; Wu C; Cao Q; Xu J; Zheng Y; Min Z; Zhang W; Han S · Nutrition reviews · 2025
    Meta-analysis34 studies pooledCardiovascular Support General Health forTaurine
  35. The effects of taurine supplementation on glycemic control and serum lipid profile in patients with type 2 diabetes: a randomized, double-blind, placebo-controlled trial.
    Maleki V; Alizadeh M; Esmaeili F; Mahdavi R · Amino acids · 2021
    Randomized trial45 participantsCardiovascular Support forTaurine
  36. Efficacy of glutamine supplementation in postoperative patients undergoing hepatic surgery: a systematic review and meta-analysis of randomized controlled trials.
    Meng X; Zhang M; Wang X · Clinics (Sao Paulo, Brazil) · 2026
    Meta-analysis1,198 participants18 studies pooledDetoxification forGlutamine
  37. Glutamine supplementation in preterm infants receiving parenteral nutrition leads to an early improvement in liver function.
    Wang Y; Cai W; Tao YX; Tang QY; Feng Y; Wu J · Asia Pacific journal of clinical nutrition · 2014
    Randomized trial30 participantsDetoxification forGlutamine
  38. Parenteral glutamine protects hepatic function during bone marrow transplantation.
    Brown SA; Goringe A; Fegan C; Davies SV; Giddings J; Whittaker JA; Burnett AK; Poynton CH · Bone marrow transplantation · 1998
    Randomized trial34 participantsDetoxification forGlutamine
  39. Protective effect of parenteral glutamine supplementation on hepatic function in very low birth weight infants.
    Wang Y; Tao YX; Cai W; Tang QY; Feng Y; Wu J · Clinical nutrition (Edinburgh, Scotland) · 2010
    Randomized trial30 participantsDetoxification forGlutamine
  40. A multistrain probiotic increases the serum glutamine/glutamate ratio in patients with cirrhosis: a metabolomic analysis.
    Laghi L; Román E; Lan Q; Nieto JC; Canalda-Baltrons A; Poca M; Sánchez-Rodríguez MB; Clària J; Alvarado E; Cuyàs B; Sánchez E; Vidal S; Guarner C; Escorsell À; Manichanh C; Soriano G · Hepatology communications · 2023
    Randomized trial32 participantsDetoxification forGlutamine
  41. The impact of obesity-associated glycine deficiency on the elimination of endogenous and exogenous metabolites via the glycine conjugation pathway.
    Tan HC; Hsu JW; Tai ES; Chacko S; Kovalik JP; Jahoor F · Frontiers in endocrinology · 2024
    Cohort study42 participantsDetoxification forGlycine
  42. Metabolic impact of dietary glycine supplementation in individuals with severe obesity.
    Tan HC; Hsu JW; Tai ES; Chacko S; Wu V; Yen PM; Kovalik JP; Jahoor F · Scientific reports · 2025
    Single-arm trial19 participantsDetoxification forGlycine
  43. Contribution towards a Metabolite Profile of the Detoxification of Benzoic Acid through Glycine Conjugation: An Intervention Study.
    Irwin C; van Reenen M; Mason S; Mienie LJ; Westerhuis JA; Reinecke CJ · PloS one · 2017
    Non-randomized trial21 participantsDetoxification forGlycine
  44. Glycine conjugation of para-aminobenzoic acid (PABA): a quantitative test of liver function.
    Furuya KN; Durie PR; Roberts EA; Soldin SJ; Verjee Z; Yung-Jato L; Giesbrecht E; Ellis L · Clinical biochemistry · 1996
    Methods validation study74 participantsDetoxification forGlycine
  45. The treatment of isovaleric acidemia with glycine supplement
    M Naglak, R Salvo, K Madsen, P Dembure, L Elsas · Pediatric research · 1988
    Non-randomized trial2 participantsDetoxification forGlycine
  46. Dietary amino acid taurine ameliorates liver injury in chronic hepatitis patients.
    Hu YH; Lin CL; Huang YW; Liu PE; Hwang DF · Amino acids · 2008
    Non-randomized trial24 participantsDetoxification forTaurine
  47. Taurine status and response to intravenous taurine supplementation in adults with short-bowel syndrome undergoing long-term parenteral nutrition: a pilot study.
    Schneider SM; Joly F; Gehrardt MF; Badran AM; Myara A; Thuillier F; Coudray-Lucas C; Cynober L; Trivin F; Messing B · The British journal of nutrition · 2006
    Single-arm trial32 participantsDetoxification forTaurine
  48. 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
  49. 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
  50. 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
  51. 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
  52. 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
  53. 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
  54. 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
  55. 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
  56. 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
  57. A systematic review and meta-analysis of propionyl-L-carnitine effects on exercise performance in patients with claudication.
    Brass EP; Koster D; Hiatt WR; Amato A · Vascular medicine (London, England) · 2013
    Meta-analysis13 studies pooledFitness forL-Carnitine
  58. Oral acetyl-L-carnitine therapy reduces fatigue in overt hepatic encephalopathy: a randomized, double-blind, placebo-controlled study.
    Malaguarnera M; Vacante M; Giordano M; Pennisi G; Bella R; Rampello L; Malaguarnera M; Li Volti G; Galvano F · The American journal of clinical nutrition · 2011
    Randomized trial121 participantsFitness forL-Carnitine
  59. Prolonged oral L-carnitine substitution increases bicycle ergometer performance in patients with severe, ischemically induced cardiac insufficiency.
    Löster H; Miehe K; Punzel M; Stiller O; Pankau H; Schauer J · Cardiovascular drugs and therapy · 2000
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    Malaguarnera M; Cammalleri L; Gargante MP; Vacante M; Colonna V; Motta M · The American journal of clinical nutrition · 2008
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  61. Taurine supplementation enhances anaerobic power in elite speed skaters: A double-blind, randomized, placebo-controlled, crossover study.
    Buzdağlı Y; Eyipınar CD; Öget F; Şıktar E; Forbes SC; Tekin A · Biology of sport · 2023
    Randomized trial30 participantsFitness forTaurine
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    Balshaw TG; Bampouras TM; Barry TJ; Sparks SA · Amino acids · 2013
    Randomized trial8 participantsFitness forTaurine
  63. Effects of different doses of taurine supplementation on repeated-sprint performance after exhaustive exercise in a high temperature and humidity environment.
    Cheng X; Lin Y; Li Z · Frontiers in nutrition · 2026
    Randomized trial16 participantsFitness forTaurine
  64. Oral taurine improves critical power and severe-intensity exercise tolerance.
    Waldron M; Patterson SD; Jeffries O · Amino acids · 2020
    Randomized trial12 participantsFitness forTaurine
  65. Acute taurine supplementation enhances thermoregulation and endurance cycling performance in the heat.
    Page LK; Jeffries O; Waldron M · European journal of sport science · 2019
    Randomized trial11 participantsFitness forTaurine
  66. Air-abrasive debridement with glycine powder versus manual debridement and chlorhexidine administration for the maintenance of peri-implant health status: a six-month randomized clinical trial.
    Lupi SM; Granati M; Butera A; Collesano V; Rodriguez Y Baena R · International journal of dental hygiene · 2018
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    Sugaya K; Oh-Oka H; Yamada T; Miyata M; Ashitomi K; Kadekawa K; Nishijima S · Journal of complementary & integrative medicine · 2021
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    Díaz-Flores M; Cruz M; Duran-Reyes G; Munguia-Miranda C; Loza-Rodríguez H; Pulido-Casas E; Torres-Ramírez N; Gaja-Rodriguez O; Kumate J; Baiza-Gutman LA; Hernández-Saavedra D · Canadian journal of physiology and pharmacology · 2014
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    Moore JA; Cousins AL; Taylor RMJ; Griffiths AR; Young HA · Foods (Basel, Switzerland) · 2026
    Systematic review244 participants8 studies pooledGeneral Health forTaurine
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    Zhang S; Xu X; Wang D; Gu Y; Wu H; Meng G; Zhang Q; Liu L; Borné Y; Niu K; Bai L · Food & function · 2026
    Cohort study16,699 participantsGeneral Health forTaurine
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    Wingelaar-Jagt YQ; Bottenheft C; Riedel WJ; Ramaekers JG · Journal of psychopharmacology (Oxford, England) · 2023
    Randomized trial32 participantsMental Focus forCaffeine
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    Smith AP; Christopher G; Sutherland D · Journal of psychopharmacology (Oxford, England) · 2013
    Randomized trial70 participantsMental Focus forCaffeine
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    Wesensten NJ; Killgore WD; Balkin TJ · Journal of sleep research · 2006
    Randomized trial48 participantsMental Focus forCaffeine
  75. Effects of caffeine on mood and performance: a study of realistic consumption.
    Brice CF; Smith AP · Psychopharmacology · 2003
    Clinical trial24 participantsMental Focus forCaffeine
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    Fine BJ; Kobrick JL; Lieberman HR; Marlowe B; Riley RH; Tharion WJ · Psychopharmacology · 1995
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  77. Cognition after a 4-week high phenylalanine intake in adults with phenylketonuria - a randomized controlled trial.
    Trepp R; Muri R; Maissen-Abgottspon S; Haynes AG; Hochuli M; Everts R · The American journal of clinical nutrition · 2024
    Randomized trial30 participantsMental Focus forPhenylalanine
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    Hofman DL; Champ CL; Lawton CL; Henderson M; Dye L · Orphanet journal of rare diseases · 2019
    Systematic review16 studies pooledMental Focus forPhenylalanine
  79. Are Functional Brain Networks Sensitive to High Phenylalanine in Adults With Phenylketonuria?
    Vallesi V; Morishima Y; Winiger L; Trepp R; Everts R; Muri R · JIMD reports · 2026
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    Weglage J; Schmidt E; Fünders B; Pietsch M; Ullrich K · Journal of clinical and experimental neuropsychology · 1997
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    van Ruitenbeek P; Sambeth A; Vermeeren A; Young SN; Riedel WJ · British journal of pharmacology · 2009
    Clinical trial17 participantsMental Focus forPhenylalanine
  82. 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
  83. 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
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    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
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    Koot P; Deurenberg P · Annals of nutrition & metabolism · 1995
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  86. 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
  87. Taurine supplementation as a therapeutic strategy for cellular senescence and chronic inflammation in long COVID: a systematic review and meta-analysis.
    Wang K; Ma CH; Khoramjoo M; Kung JY; Oudit GY · BMC infectious diseases · 2026
    Meta-analysis1,030 participants27 studies pooledMetabolism Boost forTaurine
  88. Effect of Long-Term Taurine Supplementation on the Lipid and Glycaemic Profile in Adults with Overweight or Obesity: A Systematic Review and Meta-Analysis.
    Sun Q; Wang J; Wang H; Yu H; Wan K; Ma F; Wang R · Nutrients · 2025
    Meta-analysis9 studies pooledMetabolism Boost forTaurine
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    Guan L; Miao P · European journal of pharmacology · 2021
    Meta-analysis12 studies pooledMetabolism Boost forTaurine
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    Zhang M; Bi LF; Fang JH; Su XL; Da GL; Kuwamori T; Kagamimori S · Amino acids · 2005
    Randomized trial30 participantsMetabolism Boost forTaurine
  91. Use of skeletal muscle fiber composition to assess relationship between amino acid metabolism and insulin sensitivity.
    Magnusson TE; Blackwood SJ; Tischer D; Strmeň T; Pontén M; Edman S; Horwath O; Apró W; Moberg M; Chorell E; Katz A · European journal of endocrinology · 2025
    Cross-sectional study36 participantsMetabolism Boost forTaurine
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    Zwyghuizen-Doorenbos A; Roehrs TA; Lipschutz L; Timms V; Roth T · Psychopharmacology · 1990
    Randomized trial24 participantsProductivity Boost forCaffeine
  93. 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
  94. 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
  95. 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
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    Wang R; Wang W; Meng L; Hao G; Gu G · Frontiers in nutrition · 2026
    Meta-analysis7 studies pooledProductivity Boost forCaffeine
  97. 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
  98. 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
  99. 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
  100. 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
  101. 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