Green tea clinical trial methods and results
- 68 people diagnosed previously with lupus
- Age range: 39.1 +/- 10.3 years
- BMI index range: 25.7 +/- 5.21 kg/m^2
Participants received one of two interventions:
- 1,000 mg green tea extract, 2 capsules per day; or
- 1,000 mg of starch, 2 capsules per day (serving as a placebo)
The trial was randomized, and double-blind meaning that neither participants nor the clinicians knew whether a person was taking the green tea or a the placebo.
The trial lasted 12 weeks during which the participants took the pills every day.
Disease activity was measured at baseline at at 3-months using the SLEDAI (systemic lupus erythematosus disease activity index) and a quality of life questionnaire.
Using the SLEDAI, disease activity was significantly reduced (p < 0.004) for those that received the green tea supplements. Additionally, daily intake of green tea significantly increased vitality (p < 0.006) and general health (p < 0.01).
The researchers concluded that, “daily consumption of green tea extracts for 12 weeks improves the systemic lupus erythematosus disease activity as well as some aspects of quality of life.”