Stress-reducing effect of cookies containing matcha green tea: essential ratio among theanine, arginine, caffeine and epigallocatechin gallate
| Autor: | Kazuaki Iguchi, Daisuke Furushima, Shingo Hamamoto, Yoriyuki Nakamura, Akio Morita, Monira Pervin, Hiroshi Yamada, Keiko Unno |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0301 basic medicine
Multidisciplinary Arginine Adrenal hypertrophy Physiology Epigallocatechin gallate Theanine Green tea Placebo group Article Stress marker Food science 03 medical and health sciences chemistry.chemical_compound 030104 developmental biology 0302 clinical medicine chemistry lcsh:H1-99 lcsh:Social sciences (General) Caffeine lcsh:Science (General) 030217 neurology & neurosurgery lcsh:Q1-390 |
| Zdroj: | Heliyon Heliyon, Vol 5, Iss 5, Pp e01653-(2019) |
| ISSN: | 2405-8440 |
| Popis: | The stress-reducing effect of matcha, a high-quality 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 components and their stress-reducing effect in mice that were loaded with territorially-based stress. Adrenal hypertrophy, a marker of stress, was significantly suppressed in stress-loaded mice that had ingested matcha components, displaying a caffeine and epigallocatechin gallate to theanine and arginine (CE/TA) ratio of 2 or less. Another aim was to evaluate, in humans, the stress-reducing effect of matcha in cookies using test-matcha (CE/TA = 1.79) or placebo-matcha (CE/TA = 10.64). Participants, who were fifth year pharmacy college students, consumed 4.5 g of matcha in three pieces of cookie daily for 15 days. Salivary α-amylase activity, a stress marker, was significantly lower in the test-matcha group than in the placebo group. These results indicate that the CE/TA ratio of tea components is a key indicator for the suppression of stress. Moreover, matcha with a CE/TA ratio of 2 or less displays a stress-reducing effect, even if it is included in confectionery products. Such products may also benefit individuals who have no habit of drinking matcha as a beverage. |
| Databáze: | OpenAIRE |
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