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Evidence-Based Complementary and Alternative Medicine
Volume 2014 (2014), Article ID 613647, 4 pages
Research Article

Does Propolis Contain Tannins?

1University of Santo Amaro, Rua Professor Enéas de Siqueira Neto 340, 04829-900 São Paulo, SP, Brazil
2Department of Botany, Institute of Biosciences, University of São Paulo, Rua do Matão 277, 05508-090 São Paulo, SP, Brazil

Received 9 March 2014; Accepted 30 April 2014; Published 14 May 2014

Academic Editor: Vassya Bankova

Copyright © 2014 Marco A. S. Mayworm et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Although polyphenols have been reported as common constituents of propolis, tannins have rarely been mentioned as its constituents. Propolis samples from seven localities in Brazil were analyzed for detection of proanthocyanidins (condensed tannins) and determination of the tannin content. Positive reaction for proanthocyanidins was observed for all samples tested. The contents of tannins varied in the range 0.6–4.1%. A high degree of correlation was noted between total phenols and tannin content. Red and green propolis contained high contents of tannins, while in brown propolis the content was lower. It is suggested that the contents of tannins should be a parameter to be considered in propolis characterization.