NMR analysis also shows a decreasing trend in caffeine concentration from G1 to food grade (FG).
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A Comparative Multianalytical Approach to the Characterization of Different Grades of Matcha Tea (<i>Camellia sinensis</i> (L.) Kuntze).
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The sentences
Results reveal a decreasing gradient of amino acids and caffeine from grade 1 to food grade, while other metabolites, such as polyphenols, display an increasing trend.
The analysis revealed a clear trend: amino acid concentrations decreased progressively from G1 to FG grade, with G1 standing out for its richness in amino acids, particularly theanine.