Research
641 papers, trials, theses and preprints that study matcha, gathered from PubMed, OpenAlex and Europe PMC, tagged by study type and topic, and linked back to every source. We keep abstracts and citations; the full text stays with its publisher.
Tip: use "quotes" for an exact phrase, OR between alternatives, and a minus to leave a word out, for example fluoride OR pesticide. Related words are matched too, so “EGCG” also finds “epigallocatechin.”
148 studies match for “l-theanine and caffeine”
… multiple cognitive domains, including impaired attention, hyperactivity, and increased impulsivity. According to the CDC, 9.4% of children between 2 and 17 years old have been diagnosed with ADHD. Neurotransmitters such as …
ReviewCognition, mood and stressL-theanine and caffeineCited 16×… phytochemicals. The aim of this study was to determine the basic nutritional and phenolic composition of dry matcha green tea powder. The fibre content was determined according to the enzymatic-gravimetric method. Crude protein was …
Chemical / analyticalL-theanine and caffeineProcessing, milling and qualityFood products and applicationsCited 29×… examined the ability of matcha to improve cognitive function in older adults and determined that continuous matcha intake improves attention and executive function. This study aimed to compare the effects of matcha and caffeine and …
Randomized controlled trialCognition, mood and stressL-theanine and caffeineCited 32×This review compares the effects and benefits of consuming two of the most popular hot beverages: matcha tea and coffee. Both of them have been consumed for centuries and are embedded in cultural, societal, and dietary practices worldwide. …
Systematic review / meta-analysisCognition, mood and stressMetabolism and weightAntioxidants and polyphenols… fine-powdered green tea, has recently been clarified by animal experiments and clinical trials. However, the effect of matcha added to confectioneries is not clear. One aim of this study was to evaluate the relationship between matcha …
Clinical trial (non-randomized)Cognition, mood and stressAntioxidants and polyphenolsL-theanine and caffeineCited 40×… green tea powder (matcha), which contains epigallocatechin gallate, theanine, and caffeine, has beneficial effects on cognitive function and mood. We conducted a randomized, double-blind, placebo-controlled clinical study over 12 months …
Randomized controlled trialCognition, mood and stressAntioxidants and polyphenolsL-theanine and caffeineCited 25×… of the plants during the growth period enhances the processes of synthesis and accumulation of biologically active compounds, including theanine, caffeine, chlorophyll and various types of catechins. Green tea contains four main …
ReviewCognition, mood and stressAntioxidants and polyphenolsL-theanine and caffeineCited 321×Matcha, made from different tea leaves as raw material, exhibits diverse aromas and flavors. Therefore, there is an urgent need for a rapid, non-destructive method to assess the quality of matcha to ensure that these different …
Randomized controlled trialAntioxidants and polyphenolsL-theanine and caffeineProcessing, milling and qualityCited 17×… technology coupled with multivariate analysis was investigated for rapid and non-invasive evaluation of particle size and the ratio of tea polyphenols to free amino acids (P/F ratio) of matcha. The multivariate selection algorithms …
Observational (human)Metabolism and weightAntioxidants and polyphenolsL-theanine and caffeineCited 56×… of four specific tea plant varieties (Okumidori, Longjing 43, Zhongcha108, and E'Cha 1) on various aspects of matcha, including sensory evaluation, major components, color quality, volatile and non-volatile metabolomic profiles. The …
Chemical / analyticalMetabolism and weightAntioxidants and polyphenolsL-theanine and caffeineCited 38×… origin, manufacturing process, chemical composition, factors affecting quality and health benefits of matcha (Camellia sinensis), and the application of chemometrics and multi-omics in the science of matcha. The discussion primarily …
ReviewAntioxidants and polyphenolsL-theanine and caffeineCultivation and shadingCited 39×Although theanine in matcha improves sleep quality and cognitive function, the caffeine in green tea is thought to worsen sleep quality. Therefore, this study investigated the factors behind the observed improvements in subjective sleep …
Randomized controlled trialCognition, mood and stressAntioxidants and polyphenolsL-theanine and caffeineCited 8×Matcha tea is rich in taste and bioactive constituents, quality evaluation of matcha tea is important to ensure flavor and efficacy. Near-infrared spectroscopy (NIR) in combination with variable selection algorithms was proposed as a fast …
Chemical / analyticalAntioxidants and polyphenolsL-theanine and caffeineProcessing, milling and qualityCited 117×… interest in the plant-derived healthy foods, nutraceuticals, functional foods and food supplements is increasing in recent times as potential agents in maintenance of health and the prevention and treatment of diseases. Matcha tea powder …
ReviewAntioxidants and polyphenolsL-theanine and caffeineProcessing, milling and qualityCited 61×… to health. A large content of polyphenols, amino acids (mainly tannins) and caffeine potentially increase the antioxidant properties of the drink. The aim of the study was to determine the antioxidant potential and the content of …
Agronomy / cultivationAntioxidants and polyphenolsL-theanine and caffeineCultivation and shadingCited 124×… tea. The objectives among matcha tea producers include increasing the ammonia and chlorophyll contents of tea buds, decreasing tea polyphenol contents, and enhancing tea aroma formation. In this study, Fuding white tea plants were …
Agronomy / cultivationAntioxidants and polyphenolsL-theanine and caffeineCultivation and shadingCited 42×Tea foam is crucial for new food and drink innovations. This study examined nine types and grades of matcha, identifying Longjing 43 as a high-quality raw material for matcha with good foaming properties. Foam scanning, particle …
Food science / processingMetabolism and weightAntioxidants and polyphenolsL-theanine and caffeineCited 9×… a major amino acid in green tea, exhibits a stress-reducing effect in mice and humans. Matcha, which is essentially theanine-rich powdered green tea, is abundant in caffeine. Caffeine has a strong antagonistic effect against theanine. …
Randomized controlled trialCognition, mood and stressAntioxidants and polyphenolsL-theanine and caffeineCited 84×… the Camellia sinensis plant are used to produce many different types of teas, and green tea is particularly noted for its health promoting properties which are attributed to high concentrations of phenolic compounds known as catechins. …
Observational (human)Antioxidants and polyphenolsL-theanine and caffeineProcessing, milling and qualityCited 46×Matcha, or powdered green tea, has been gaining popularity and is no longer consumed only in the form of infusions, finding new uses in gastronomy and the food industry. The range of teas available on the food market has expanded …
Chemical / analyticalAntioxidants and polyphenolsL-theanine and caffeineCultivation and shadingCited 13×Matcha and green-tea bioactives are widely promoted for stress and hormonal health, yet the evidence is fragmented across chemically dissimilar preparations (whole-leaf matcha, brewed green tea, isolated L-theanine, and concentrated …
Systematic review / meta-analysisCognition, mood and stressAntioxidants and polyphenolsL-theanine and caffeineAnalysis of three matcha (cyclone-, bead- and stone-milled) revealed differences in their sizes and surface morphologies. Using liquid chromatography, 4 sugars, 6 organic acids, 18 amino acids and 9 polyphenols were detected in all matcha …
Chemical / analyticalAntioxidants and polyphenolsL-theanine and caffeineProcessing, milling and qualityCited 28×… prior to harvest. This practice enhances the accumulation of chlorophyll, caffeine, L-theanine, and other bioactive compounds. In addition, specialized post-harvest processing, including careful hand-picking, gentle steaming, drying, …
ReviewCognition, mood and stressMetabolism and weightAntioxidants and polyphenolsCited 2×… syndromes. As the emerging food additive rich in tea polyphenols, theanine, caffeine, and so on, matcha green tea has gained more and more popularity for its outstanding potential in ameliorating metabolic disorders. This study …
Animal studyMetabolism and weightAntioxidants and polyphenolsGut and microbiomeCited 22×Every record comes from three open scholarly indexes — PubMed, OpenAlex and Europe PMC — searched for the word “matcha.” Records are merged by DOI and PubMed ID so each study appears once. A paper is kept only if matcha appears in its title, abstract, author keywords or subject terms and the text is about tea or food, which filters out the surname Matcha, software called Matcha, and the Scandinavian verb “matcha” (to match).
Study type and topic tags are assigned automatically from each paper's own title, abstract and subject terms using fixed keyword rules — no guesses, and papers without an abstract are marked as unclassified. Automatic tagging is imperfect, so treat tags as a way to narrow a search, not as a verdict on a paper's quality. A study being listed here is not an endorsement of its findings.
Coverage: this is every indexed paper that names matcha, not every study of green tea or its compounds (those are far more numerous). Papers that mention matcha only in passing are hidden by default. Work that never uses the word “matcha,” and publications outside these indexes, are not included. The library was last rebuilt October 20, 2026.
Spot a paper that doesn't belong, or one that's missing? Tell us.