Teas, dietary supplements and fruit juices: A comparative study regarding antioxidant activity and bioactive compounds

• Type: Article in International Scientific Journal
• Date: 2012

Authors

Costa, ASG (Author) Other; Nunes, MA (Author) Other; Almeida, IMC (Author) Other; Carvalho, MR (Author) Other; Barroso, MF (Author) Other; Alves, RC (Author) Other; Oliveira, MBPP (Author) FFUP

Journal

Title: LWT - Food Science and Technology

Vol. 49

Pages: 324-328

ISSN: 0023-6438

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 27 Citations

Scopus - 33 Citations

Scientific classification

FOS: Agrarian Sciences > Other Agrarian Sciences

Other information

Authenticus ID: P-002-381

DOI: 10.1016/j.lwt.2012.02.030

Abstract (EN): Nowadays, new emerging products claiming antioxidant properties are becoming more frequent. However, information about this topic in their labels is usually scarce. In this paper, we analyzed total phenolics, total flavonoids and ascorbic acid contents, as well as DPPH scavenging activity of several commercial samples, namely green tea and other herbal infusions, dietary supplements, and fruit juices, available in the Portuguese market. In general, beverages containing green tea and hibiscus showed higher phenolics contents (including flavonoids) and antioxidant activity than those without these ingredients. A borututu infusion presented the lowest concentrations of bioactive compounds and scavenging activity, due to the low recommended amount of plant to prepare the beverage. Some juices without antioxidant claims in the label presented similar values to those with it.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 5