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Open Access Highly Accessed Research article

Hypoglycemic and antilipidemic properties of kombucha tea in alloxan-induced diabetic rats

Ahmed Aloulou1*, Khaled Hamden2, Dhouha Elloumi3, Madiha Bou Ali1, Khaoula Hargafi4, Bassem Jaouadi5, Fatma Ayadi4, Abdelfattah Elfeki2 and Emna Ammar3

Author Affiliations

1 Laboratory of Biochemistry and Enzymatic Engineering of Lipases, National School of Engineers of Sfax, University of Sfax, Sfax, 3038, Tunisia

2 Biotechnology High School of Sfax, University of Sfax, Sfax, 3052, Tunisia

3 Research Unit Management of Coastal and Urban environments, National School of Engineers of Sfax, University of Sfax, Sfax, 3038, Tunisia

4 Research Unit Molecular Bases of Human Diseases, Sfax College of Medicine, University of Sfax, Sfax, 3000, Tunisia

5 Laboratory of Microorganisms and Biomolecules, Centre of Biotechnology of Sfax, University of Sfax, Sfax, 3018, Tunisia

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BMC Complementary and Alternative Medicine 2012, 12:63  doi:10.1186/1472-6882-12-63

Published: 16 May 2012

Abstract

Background

Diabetes has become a serious health problem and a major risk factor associated with troublesome health complications, such as metabolism disorders and liver-kidney dysfunctions. The inadequacies associated with conventional medicines have led to a determined search for alternative natural therapeutic agents. The present study aimed to investigate and compare the hypoglycemic and antilipidemic effects of kombucha and black tea, two natural drinks commonly consumed around the world, in surviving diabetic rats.

Methods

Alloxan diabetic rats were orally supplied with kombucha and black tea at a dose of 5 mL/kg body weight per day for 30 days, fasted overnight, and sacrificed on the 31st day of the experiment. Their bloods were collected and submitted to various biochemical measurements, including blood glucose, cholesterol, triglcerides, urea, creatinine, transaminases, transpeptidase, lipase, and amylase activities. Their pancreases were isolated and processed to measure lipase and α-amylase activities and to perform histological analysis.

Results

The findings revealed that, compared to black tea, kombucha tea was a better inhibitor of α-amylase and lipase activities in the plasma and pancreas and a better suppressor of increased blood glucose levels. Interestingly, kombucha was noted to induce a marked delay in the absorption of LDL-cholesterol and triglycerides and a significant increase in HDL-cholesterol. Histological analyses also showed that it exerted an ameliorative action on the pancreases and efficiently protected the liver-kidney functions of diabetic rats, evidenced by significant decreases in aspartate transaminase, alanine transaminase, and gamma-glytamyl transpeptidase activities in the plasma, as well as in the creatinine and urea contents.

Conclusions

The findings revealed that kombucha tea administration induced attractive curative effects on diabetic rats, particularly in terms of liver-kidney functions. Kombucha tea can, therefore, be considered as a potential strong candidate for future application as a functional supplement for the treatment and prevention of diabetes.