MatchaDB

Research

The Global Matcha Research Library

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.”

Popular searchesL-theanineEGCG and catechinsCaffeineFocus and memoryStress and sleepWeight and metabolismGut healthContaminantsPesticidesShade-growingAroma and flavorTea ceremony

6 studies match for “partial least squares regression”

2019Journal article

Evaluation of matcha tea quality index using portable NIR spectroscopy coupled with chemometric algorithms.

Wang J, Zareef M, He P, et al. — Journal of the science of food and agriculture

… derivative (1 st D) tests. The data were then subjected to full spectral partial least squares (PLS) and four variable selection algorithms, such as random frog partial least square (RF‐PLS), synergy interval partial least square …

Randomized controlled trialAntioxidants and polyphenolsL-theanine and caffeineProcessing, milling and qualityCited 114×
2024Journal articleFree to read

Detection of the Pigment Distribution of Stacked Matcha During Processing Based on Hyperspectral Imaging Technology

Qinghai He, Zhiyuan Liu, Xiaoli Li, et al. — Agriculture

… between HSI data of tea and their pigment contents was developed based on regression analysis, and the results showed that exceptional prediction performance was achieved by the partial least squares regression (PLSR) algorithm …

Chemical / analyticalProcessing, milling and qualityAuthenticity and analytical methodsMetabolism and weightCited 4×
2018Journal article

Fast nondestructive identification of steamed green tea powder adulterations in matcha by visible spectroscopy combined with chemometrics

Xiao‐Lan Yu, Yong He — Spectroscopy Letters

… of class analogy model in the qualitative classification as well as the partial least squares model in the quantitative analysis performed well with the accuracy of 100% and R2 of 0.9815 in their corresponding prediction sets. …

Chemical / analyticalProcessing, milling and qualityAuthenticity and analytical methodsCited 18×
2024Journal article

Comprehensive assessment of matcha qualities and visualization of constituents using hyperspectral imaging technology.

Hu Y, Yu H, Song X, et al. — Food research international (Ottawa, Ont.)

… reached 98.10 %. After feature selection using the random forest (RF) method, partial least squares regression (PLSR) was built to predicted the quality of matcha, which showed high prediction accuracy (test set Rp2 > 0.95). The model …

Randomized controlled trialAntioxidants and polyphenolsL-theanine and caffeineProcessing, milling and qualityCited 17×
2022Journal article

Effect of three milling processes (cyclone-, bead- and stone-millings) on the quality of matcha: Physical properties, taste and aroma.

Huang Y, Goh RMV, Pua A, et al. — Food chemistry

… between chemical composition and sensory evaluation data was carried out using partial least square regression. In conclusion, milling processes clearly affected the physical, chemical and sensory qualities of matcha.

Chemical / analyticalAntioxidants and polyphenolsL-theanine and caffeineProcessing, milling and qualityCited 28×

How this library is built

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.

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