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© 2026 Works for UsObservational and educational only

Supplements for Focus & Concentration UK: What Users Report

← Condition library

Cognitive

Focus & Concentration

Difficulty concentrating, brain fog, and attention issues. Increasingly common in the age of distraction.

4linked compounds

21linked studies

4compounds tracked

On this pageCompounds Community outcomes Research

Linked compounds

Where people begin exploring.

These compounds appear in related research or traditional use. Their position is not a recommendation or ranking.

01L-TheanineSupplement0 studies→02Lion's Mane MushroomNootropic0 studies→03Creatine MonohydrateSupplement0 studies→04Alpha-GPCNootropic0 studies→

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Peer-reviewed research

Keep evidence in the room.

Open the original papers, check their methods, and discuss what is relevant with a qualified professional.

01Compositional Diversity and Functional Interactions of Bioactive Compounds in Japanese Green Tea: Focus on Matcha, Sencha, and GyokuroUnno K, et al. · Molecules (Basel, Switzerland) · 2026

Journal Article · matched via Focus · PubMed record (CORPUS-A)

PMID 42654013 ↗02Identification of the GATA transcription factor family in tea plant (Camellia sinensis) and the characterizations in nitrogen metabolismGao Y, et al. · Plant physiology and biochemistry : PPB · 2025

Journal Article · matched via Focus · PubMed record (CORPUS-A)

PMID 39987619 ↗03Neurobehavioural Exploration of Breath-counting & Breath-awareness in Novice Indian Meditators: A Naturalised Ānāpānasati-based Paradigmatic ApproachBrahmi M, et al. · Annals of neurosciences · 2025

Journal Article · matched via Focus · PubMed record (CORPUS-A)

PMID 39850443 ↗04Mentha pulegium L. and Salvia officinalis L. Bioactive Compounds: Focus on Their Application in Agriculture and Food PackagingKhodja NK, et al. · Chemistry & biodiversity · 2025

Journal Article · matched via Focus · PubMed record (CORPUS-A)

PMID 39903845 ↗05Nonclinical and Clinical Assessments of an Optimized Tablet Formulation of the Novel HER2-Selective Tyrosine Kinase Inhibitor Zongertinib: Focus on Relative Bioavailability and Impact of Variation of Gastric pHWölke S, et al. · Molecular pharmaceutics · 2025

Randomized Controlled Trial · matched via Focus · PubMed record (CORPUS-A)

PMID 41060706 ↗

06

Exposure-response analysis of oral and intravenous imatinib in critically ill patients with COVID-19 acute respiratory distress syndromeSaid MM, et al. · European journal of pharmaceutical sciences : official journal of the European Federation for Pharmaceutical Sciences · 2025

Randomized Controlled Trial · matched via Focus · PubMed record (CORPUS-A)

PMID 41109533 ↗

07L-Theanine and caffeine improve attention and focus: A systematic reviewCamfield D et al. · Nutr Rev · 2024

L-theanine combined with caffeine consistently improved attention and task performance.

PMID 25182352 ↗

08Neurochemical and genetic factors in panic disorder: a systematic reviewMoraes ACN, et al. · Translational psychiatry · 2024

Systematic Review · matched via Focus · PubMed record (CORPUS-A)

PMID 39025836 ↗

09Lion's Mane mushroom improves cognitive function: A double-blind trialMori K et al. · Phytother Res · 2023

3g Lion's Mane powder daily for 16 weeks improved cognitive scores in mild cognitive impairment.

PMID 24266378 ↗

10Creatine supplementation improves short-term memory and intelligenceRae C et al. · Proc Biol Sci · 2023

Creatine supplementation improved working memory and intelligence tasks, especially in vegetarians.

PMID 15660277 ↗

11Ameliorative Effects of Phytomedicines on Alzheimer's PatientsKhandia R, et al. · Current Alzheimer research · 2022

Review · matched via Focus · PubMed record (CORPUS-A)

PMID 35692129 ↗

12In Vitro Antiviral Activity of Potential Medicinal Plant Extracts Against Dengue and Chikungunya VirusesAlagarasu K, et al. · Frontiers in cellular and infection microbiology · 2022

Journal Article · matched via Focus · PubMed record (CORPUS-A)

PMID 35463636 ↗

13Effects of Combined Lipid-Lowering Therapy on Low-Density Lipoprotein Cholesterol Variability and Cardiovascular Adverse Events in Patients with Acute Coronary SyndromeTan H, et al. · Advances in therapy · 2021

Randomized Controlled Trial · matched via Focus · PubMed record (CORPUS-A)

PMID 34018147 ↗

14The Safety and Efficacy of Botanicals with Nootropic EffectsRoe AL, et al. · Current neuropharmacology · 2021

Journal Article · matched via Focus · PubMed record (CORPUS-A)

PMID 34315377 ↗

15Molecular profiling of afatinib-resistant non-small cell lung cancer cells in vivo derived from miceChung CT, et al. · Pharmacological research · 2020

Meta-Analysis · matched via Focus · PubMed record (CORPUS-A)

PMID 32896579 ↗

16The potential role of nutritional components in improving brain function among patients with Alzheimers disease: a meta-analysis of RCT studiesAlbrahim T · Neurosciences (Riyadh, Saudi Arabia) · 2020

Meta-Analysis · matched via Focus · PubMed record (CORPUS-A)

PMID 31982903 ↗

17L-Theanine Down-Regulates the JAK/STAT3 Pathway to Attenuate the Proliferation and Migration of Vascular Smooth Muscle Cells Induced by Angiotensin IIBen P, et al. · Biological & pharmaceutical bulletin · 2018

Journal Article · matched via Focus · PubMed record (CORPUS-A)

PMID 30381668 ↗

18Chiral analysis of theanine and catechin in characterization of green tea by cyclodextrin-modified micellar electrokinetic chromatography and high performance liquid chromatographyFiori J, et al. · Journal of chromatography. A · 2018

Journal Article · matched via Focus · PubMed record (CORPUS-A)

PMID 29859684 ↗

19Genetic factors affecting statin concentrations and subsequent myopathy: a HuGENet systematic reviewCanestaro WJ, et al. · Genetics in medicine : official journal of the American College of Medical Genetics · 2014

Systematic Review · matched via Focus · PubMed record (CORPUS-A)

PMID 24810685 ↗

20Effects of a pre-workout supplement on lean mass, muscular performance, subjective workout experience and biomarkers of safetyKedia AW, et al. · International journal of medical sciences · 2014

Randomized Controlled Trial · matched via Focus · PubMed record (CORPUS-A)

PMID 24465156 ↗

21Nutritional evaluation of protein hydrolysate formulas in healthy term infants: plasma amino acids, hematology, and trace elementsHernell O, et al. · The American journal of clinical nutrition · 2003

Randomized Controlled Trial · matched via Focus · PubMed record (CORPUS-A)

PMID 12885712 ↗

What publications report

Outcome summaries extracted from the linked papers' curated records. Educational, not medical advice.

01Attention and task performance — Improved

Consistently improved with L-theanine + caffeine

Adults · Systematic review · PMID 25182352 ↗Strong evidenceImproved 02Cognitive function — Improved

Improved cognitive scores (3g daily, 16 weeks)

Adults with mild cognitive impairment · Double-blind trial · PMID 24266378 ↗Moderate evidenceImproved 03Short-term memory and intelligence — Improved

Improved, especially in vegetarians

Adults (vegetarians highlighted) · Clinical study · PMID 15660277 ↗Insufficient evidenceImproved

Figures are reported as published; study designs and populations vary. Works for Us does not interpret results or provide medical advice.

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Important: Studies vary in quality and relevance. Works for Us does not interpret them or provide medical advice.