title: Content of Selected Minerals and Active Ingredients in Teas Containing Yerba Mate and Rooibos.
abstract: The study aimed to determine the content of selected elements: sodium, potassium, copper, zinc, iron, manganese and active ingredients such as phenolic acids and tannins in teas containing Yerba Mate and Rooibos cultivated in various areas. The study material comprised six samples of Yerba Mate teas and of Rooibos teas, both tea bags and leaves, purchased in Puławy and online via Allegro. In total, 24 samples were tested. Yerba Mate was particularly abundant in Mn and Fe. The richest source of these elements was Yerba Mate Yer-Vita (2261.3 mg · kg(-1) d.m.) and (691.6 mg · kg(-1) d.m.). The highest content of zinc was determined in Yerba Mate Amanda with lime (106.0 mg · kg(-1) d.m.), while copper was most abundant in Yerba Mate Big-Active cocoa and vanilla (14.05 mg · kg(-1) d.m.). In Rooibos, the content of sodium was several times higher than in Yerba Mate. A clear difference was observed in the content of minerals in dry weight of the examined products, which could be a result of both the taxonomic distinctness and the origin of the raw material. Leaf teas turned out to be a better source of tannins; on the other hand, tea bags contained substantially more phenolic acids. The richest source of phenolic acids was Yer-Vita in bags (1.8 %), and the highest amount of tannins was recorded in the leaf tea Green Goucho caramel and dark chocolate (9.04 g · 100 g(-1) d.m.). In Rooibos products, the highest content of phenolic acids was recorded in tea bags (Savannah with honey and vanilla 0.96 %), and tannins in (Lord Nelson with strawberry and cream 7.99 g · 100 g (-1) d.m.).
authors.affiliation: Chair of Biochemistry and Toxicology, University of Life Sciences in Lublin, 13 Akademicka Street, 20-950, Lublin, Poland. elzbieta.rusinek@up.lublin.pl.
authors.forename: Elżbieta
authors.initials: E
authors.lastname: Rusinek-Prystupa
authors.affiliation: Chair and Institute of Food and Nutrition, Medical University of Lublin, Lublin, Poland.
authors.forename: Zbigniew
authors.initials: Z
authors.lastname: Marzec
authors.affiliation: Chair of Biochemistry and Toxicology, University of Life Sciences in Lublin, 13 Akademicka Street, 20-950, Lublin, Poland.
authors.forename: Iwona
authors.initials: I
authors.lastname: Sembratowicz
authors.affiliation: Institute of Animal Nutrition and Bromatology, University of Life Sciences in Lublin, Lublin, Poland.
authors.forename: Wioletta
authors.initials: W
authors.lastname: Samolińska
authors.affiliation: Institute of Animal Nutrition and Bromatology, University of Life Sciences in Lublin, Lublin, Poland.
authors.forename: Bożena
authors.initials: B
authors.lastname: Kiczorowska
authors.affiliation: Institute of Animal Nutrition and Bromatology, University of Life Sciences in Lublin, Lublin, Poland.
authors.forename: Małgorzata
authors.initials: M
authors.lastname: Kwiecień
mesh_terms: D036903:Aspalathus / Q000737:chemistry*; D062385:Hydroxybenzoates / Q000032:analysis*; D030019:Ilex paraguariensis / Q000737:chemistry*; D008903:Minerals / Q000032:analysis*; D013634:Tannins / Q000032:analysis*; D013662:Tea / Q000737:chemistry*
chemical_list: D062385:Hydroxybenzoates; D008903:Minerals; D013634:Tannins; D013662:Tea; C017616:phenolic acid
keywords: Active ingredients; Aspalathus linearis; Ilex paraguariensis; Minerals