Black Tea and Reduced Diastolic Blood Pressure

Doses used in studies

Time to effect

Median: 4.5 months · IQR 3.8 months–5.3 months · Range 3 months–6 months — Reported in 2 of 2 studies

Safety in these studies

appendicitisReported
Adverse events were measured in five trials and included a diagnosis of prostate cancer, hospitalisation for influenza, appendicitis and retinal detachment but these are unlikely to be directly attributable to the intervention.
from: Green and black tea for the primary prevention of cardiovascular disease.
hospitalisation for influenzaReportedSerious adverse event
Adverse events were measured in five trials and included a diagnosis of prostate cancer, hospitalisation for influenza, appendicitis and retinal detachment but these are unlikely to be directly attributable to the intervention.
from: Green and black tea for the primary prevention of cardiovascular disease.
prostate cancerReported
Adverse events were measured in five trials and included a diagnosis of prostate cancer, hospitalisation for influenza, appendicitis and retinal detachment but these are unlikely to be directly attributable to the intervention.
from: Green and black tea for the primary prevention of cardiovascular disease.
retinal detachmentReported
Adverse events were measured in five trials and included a diagnosis of prostate cancer, hospitalisation for influenza, appendicitis and retinal detachment but these are unlikely to be directly attributable to the intervention.
from: Green and black tea for the primary prevention of cardiovascular disease.

2 of 2 papersPopulation:

Black tea lowers the rate of blood pressure variation: a randomized controlled trial.