Antidiabetic Effects of Tea

Molecules. 2017 May 20;22(5):849. doi: 10.3390/molecules22050849.

Abstract

Diabetes mellitus (DM) is a chronic endocrine disease resulted from insulin secretory defect or insulin resistance and it is a leading cause of death around the world. The care of DM patients consumes a huge budget due to the high frequency of consultations and long hospitalizations, making DM a serious threat to both human health and global economies. Tea contains abundant polyphenols and caffeine which showed antidiabetic activity, so the development of antidiabetic medications from tea and its extracts is increasingly receiving attention. However, the results claiming an association between tea consumption and reduced DM risk are inconsistent. The advances in the epidemiologic evidence and the underlying antidiabetic mechanisms of tea are reviewed in this paper. The inconsistent results and the possible causes behind them are also discussed.

Keywords: Camellia sinensis; caffeine; diabetes mellitus; epidemiological analysis; tea catechins; tea polysaccharides.

Publication types

  • Review

MeSH terms

  • Animals
  • Caffeine / chemistry
  • Caffeine / isolation & purification
  • Caffeine / pharmacology
  • Camellia sinensis / chemistry*
  • Catechin / chemistry
  • Catechin / isolation & purification
  • Catechin / pharmacology*
  • Diabetes Mellitus / diet therapy*
  • Diabetes Mellitus / epidemiology
  • Diabetes Mellitus / metabolism
  • Diabetes Mellitus / physiopathology
  • Diabetes Mellitus, Experimental / diet therapy
  • Diabetes Mellitus, Experimental / metabolism
  • Diabetes Mellitus, Experimental / physiopathology
  • Epidemiologic Studies
  • Flavonoids / chemistry
  • Flavonoids / isolation & purification
  • Flavonoids / pharmacology
  • Gene Expression Regulation / drug effects
  • Glucose Transport Proteins, Facilitative / antagonists & inhibitors
  • Glucose Transport Proteins, Facilitative / genetics
  • Glucose Transport Proteins, Facilitative / metabolism
  • Humans
  • Hypoglycemic Agents / chemistry
  • Hypoglycemic Agents / isolation & purification
  • Hypoglycemic Agents / pharmacology*
  • Insulin Resistance
  • Polyphenols / chemistry
  • Polyphenols / isolation & purification
  • Polyphenols / pharmacology*
  • Tea / chemistry*

Substances

  • Flavonoids
  • Glucose Transport Proteins, Facilitative
  • Hypoglycemic Agents
  • Polyphenols
  • Tea
  • Caffeine
  • Catechin