image
Conservation

Compilation of herbal plants (description, geographical distribution, taxonomy, line drawings), biodiversity and herbarium.

Read More
image
Research & Publication

Description of herbal and T&CM research, searchable publication and process from medicinal plant discovery to clinical trial in producing a high-quality registered herbal drug.

Read More
 
Traditional & Complementary Medicine (T&CM)

 

Definition and description of therapies, policy, training and education, research in the practise of (T&CM) and integrated medicine system.           

Read More

 

News Update

Announcement & Advertisement

Forthcoming Events

Seminar Tumbuhan Ubatan, Beraroma dan Pegetahuan Tradisi 2020

From Tue, 10. November 2020 Until Wed, 11. November 2020

2nd International Conference on Natural Products & Traditional Medicine

From Mon, 16. November 2020 Until Tue, 17. November 2020

World Congress on Biologics and Biosimilars

From Mon, 16. November 2020 Until Tue, 17. November 2020

14th International Conference on Natural Products Chemistry (ICNPC) 2020

From Thu, 19. November 2020 Until Fri, 20. November 2020

International Conference on Malay Medical Manuscript

From Tue, 15. December 2020 Until Wed, 16. December 2020

Total antioxidant capacity of teas by the ferric reducing/antioxidant power assay.

Author

Benzie IF, Szeto YT

Date

2/1999

Journal

J Agric Food Chem

Abstract

This study aimed to compare in vitro antioxidant power of different types of tea (Camellia sinensis). The ferric reducing/antioxidant power (FRAP) assay was used to measure the total antioxidant power of freshly prepared infusions of 25 types of teas. Results showed that different teas had widely different in vitro antioxidant power and that the antioxidant capacity was strongly correlated (r = 0. 956) with the total phenolics content of the tea. Expressed as micromol of antioxidant power/g of dried tea leaves, values ranged as 132-654 micromol/g for black ("fermented") teas, 233-532 micromol/g for Oolong ("semifermented") teas, and 272-1144 micromol/g for green ("nonfermented") teas. One cup of tea of usual strength (1-2%), therefore, can provide the same potential for improving antioxidant status as around 150 mg of pure ascorbic acid (vitamin C).

Explore Further

Consumer Data

Consumer data including medicinal herbs, dietary supplement monographs, health condition monographs and interactions and depletions.                                    

Read More
Professional Data

Professional data organized into medicinal herbs, dietary supplement monographs, health condition monographs, T&CM herbs, formulas, health conditions, interactions and depletions.

Read More
International Data

We offer International linkages to provide extensive content pertaining to many facets of T&CM as well as Integrated Medicine. Please register for access.    

Read More