In a double-blind, placebo-controlled trial with patients suffering from an early form of hypertension (pre-hypertension and stage 1 hypertension), the effect of quercetin on blood pressure was investigated. This dietary supplement led to a reduction in both systolic and diastolic blood pressure. The reduction in diastolic blood pressure was statistically significant (P < 0.01). Please see the study for more details.
Kun Ye, Fen Tang , Xin Liao , Benjamin A Shaw , Meiqiu Deng, Guangyi Huang , Zhiqiang Qin , Xiaomei Peng, Hewei Xiao , Chunxia Chen , Xiaochun Liu , Leping Ning , Bangqin Wang , Ningning Tang , Min Li , Fan Xu , Shao Lin , Jianrong Yang0