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- Title
Characterization of L-theanine in tea extracts and synthetic products using stable isotope ratio analysis.
- Authors
Perini, Matteo; Pianezze, Silvia; Ziller, Luca; Camin, Federica
- Abstract
L-theanine involves a great number of health benefits and dietary supplements containing this molecule are becoming increasingly popular. There is, therefore, a growing need to find ways to discriminate between natural L-theanine extracted from tea leaves and the cheaper, synthetic one obtained using specific bacterial enzymes. A first attempt of stable isotope ratio analysis characterization of the possible synthetic adulterant L-theanine (Δ13 C of ¡14.3 ± 1.5‰), obtained from vegetable substrates with C4 photosynthetic cycle, and of the more expensive natural L-theanine (Δ13 C of ¡24.4 ± 1.3‰), extracted from Camellia sinensis plants with C3 photosynthetic cycle, is reported here.
- Subjects
LEAVES; TEA; PLANT extracts; ISOTOPES
- Publication
Journal of Food & Drug Analysis, 2021, Vol 29, Issue 2, p311
- ISSN
1021-9498
- Publication type
Article
- DOI
10.38212/2224-6614.3349