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Chemical composition of green tea (Camellia sinensis) infusions commercialized in Portugal.
Plant Foods Hum Nutr. 2007 Dec; 62(4):139-44.PF

Abstract

To evaluate the potential benefits and risks associated with tea consumption it is important to identify the constituents of this beverage. Levels of some minerals, caffeine and catechins in green tea samples commercialized in Portugal were evaluated. Potassium is the metal present in larger amount (92-151 mg/l). The content of sodium, calcium, fluoride, aluminium, manganese and iron were 35-69, 1.9-3.5, 0.80-2.0, 1.0-2.2, 0.52-1.9, 0.020-0.128 mg/l, respectively. Chromium and selenium were not detected. The resulting data showed considerable variability in catechins content. The levels of epigallocatechin gallate (EGCG) ranged from 117 to 442 mg/l, epicatechin 3-gallate (EGC) from 203 to 471 mg/l, epigallocatechin (ECG) from 16.9 to 150 mg/l, epicatechin (EC) from 25 to 81 mg/l and catechin (C) from 9.03 to 115 mg/l. Caffeine contents in the green tea infusions studied were between 141-338 mg/l. Green tea infusions provide significant amounts of catechins and could be an important source of some minerals.

Authors+Show Affiliations

Faculdade de Farmácia da Universidade de Lisboa, Lisbon, Portugal.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

17899383

Citation

Reto, Márcia, et al. "Chemical Composition of Green Tea (Camellia Sinensis) Infusions Commercialized in Portugal." Plant Foods for Human Nutrition (Dordrecht, Netherlands), vol. 62, no. 4, 2007, pp. 139-44.
Reto M, Figueira ME, Filipe HM, et al. Chemical composition of green tea (Camellia sinensis) infusions commercialized in Portugal. Plant Foods Hum Nutr. 2007;62(4):139-44.
Reto, M., Figueira, M. E., Filipe, H. M., & Almeida, C. M. (2007). Chemical composition of green tea (Camellia sinensis) infusions commercialized in Portugal. Plant Foods for Human Nutrition (Dordrecht, Netherlands), 62(4), 139-44.
Reto M, et al. Chemical Composition of Green Tea (Camellia Sinensis) Infusions Commercialized in Portugal. Plant Foods Hum Nutr. 2007;62(4):139-44. PubMed PMID: 17899383.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Chemical composition of green tea (Camellia sinensis) infusions commercialized in Portugal. AU - Reto,Márcia, AU - Figueira,Maria Eduardo, AU - Filipe,Helder Mota, AU - Almeida,Cristina M M, Y1 - 2007/09/27/ PY - 2007/04/03/received PY - 2007/08/08/accepted PY - 2007/9/28/pubmed PY - 2007/12/27/medline PY - 2007/9/28/entrez SP - 139 EP - 44 JF - Plant foods for human nutrition (Dordrecht, Netherlands) JO - Plant Foods Hum Nutr VL - 62 IS - 4 N2 - To evaluate the potential benefits and risks associated with tea consumption it is important to identify the constituents of this beverage. Levels of some minerals, caffeine and catechins in green tea samples commercialized in Portugal were evaluated. Potassium is the metal present in larger amount (92-151 mg/l). The content of sodium, calcium, fluoride, aluminium, manganese and iron were 35-69, 1.9-3.5, 0.80-2.0, 1.0-2.2, 0.52-1.9, 0.020-0.128 mg/l, respectively. Chromium and selenium were not detected. The resulting data showed considerable variability in catechins content. The levels of epigallocatechin gallate (EGCG) ranged from 117 to 442 mg/l, epicatechin 3-gallate (EGC) from 203 to 471 mg/l, epigallocatechin (ECG) from 16.9 to 150 mg/l, epicatechin (EC) from 25 to 81 mg/l and catechin (C) from 9.03 to 115 mg/l. Caffeine contents in the green tea infusions studied were between 141-338 mg/l. Green tea infusions provide significant amounts of catechins and could be an important source of some minerals. SN - 0921-9668 UR - https://www.unboundmedicine.com/medline/citation/17899383/Chemical_composition_of_green_tea__Camellia_sinensis__infusions_commercialized_in_Portugal_ L2 - https://doi.org/10.1007/s11130-007-0054-8 DB - PRIME DP - Unbound Medicine ER -