title: The effects of green tea consumption on metabolic and anthropometric indices in patients with Type 2 diabetes.
abstract: BACKGROUND
  This study aims at investigating the possible effects of different daily doses of green tea (GT) intake for eight weeks on certain anthropometric, metabolic, and oxidative stress biomarkers of diabetic patients.
  
  
  METHODS
  This randomized clinical trial included 63 patients with type 2 diabetes (30 males and 33 females). After a two-week run-in period without green tea, they were randomly assigned into one of the three groups, with a different daily intake of green tea; four cups of green tea per day (n = 24), two cups of green tea per day (n = 25), and the control group (n = 14) with no green tea intake for two months. At baseline and after the intervention, blood tests, dietary, and anthropometric variables were assessed. The patients were instructed to maintain their usual dietary intake and normal physical activity.
  
  
  RESULTS
  Consumption of four cups of GT per day caused a significant decrease in body weight (73.2 to 71.9) (P < 0.001), body mass index (27.4 to 26.9) (P < 0.001), waist circumference (95.8 to 91.5) (P < 0.001), and systolic blood pressure (126.2 to 118.6) (P < 0.05) in this group. No significant change was seen in the other groups and between group comparisons. The metabolic and oxidative stress parameters did not show any significant differences within and between groups.
  
  
  CONCLUSIONS
  Drinking four cups of green tea led to a significant reduction in weight and systolic blood pressure.
authors: Department of Cellular and Molecular Nutrition, School of Nutrition and Dietetics, Tehran University of Medical Sciences, Tehran, Iran.
authors: Ateke
authors: A
authors: Mousavi
authors: Department of Nutrition, School of Public Health, Iran University of Medical Sciences, Tehran, Iran ; Department of Endocrinology, School of Public Health, Iran University of Medical Sciences, Tehran, Iran.
authors: Mohammadreza
authors: M
authors: Vafa
authors: Laboratory of Nutrition Research, National Nutrition and Food Technology Research Institute (NNFTRI), Shaheed Beheshti University of Medical Sciences, Tehran, Iran.
authors: Tirang
authors: T
authors: Neyestani
authors: Department of Endocrinology, School of Public Health, Iran University of Medical Sciences, Tehran, Iran ; Endocrinology Research Center, Institute of Endocrinology and Metabolism, Iran University of Medical Sciences, Tehran, Iran.
authors: Mohammadebrahim
authors: M
authors: Khamseh
authors: Department of Statistics, School of Management and Medical Information, Iran University of Medical Sciences, Tehran, Iran.
authors: Fatemeh
authors: F
authors: Hoseini
keywords: Anthropometric indices; Type 2 diabetes; green tea; metabolic indices