Quercetin
Quercetin is a plant flavonoid found in foods such as onions and apples.
Also listed as Quercetin Phytosome, Sophora Japonica, Quercetin Extract, Apple extract
Does it lower blood pressure?
A 2020 meta-analysis of 17 trials found blood-pressure reductions of about 3 mmHg. A later umbrella review found a smaller systolic reduction, about 1.9 mmHg, without a clear diastolic effect; certainty ranged from very low to moderate. 1 2
What about metabolism and inflammation?
The 2023 umbrella review found no overall improvement in lipids or inflammation. A 2024 analysis of 20 trials found fasting glucose about 1 mg/dL lower, but no clear triglyceride or HDL benefit. These marker findings do not establish prevention of cardiovascular events. 2 3
Effects by health goal
Open an effect to see the studies behind its rating. Bars show the size of the effect; the letter grades the evidence.
Longevity1 effect
Cardiovascular2 effects
No study is linked to this rating.
Gut Health1 effect
No study is linked to this rating.
Immune Support2 effects
No study is linked to this rating.
No study is linked to this rating.
Weight Management1 effect
No study is linked to this rating.
Other effects1 effect
No study is linked to this rating.
All studies
6 publications are linked to Quercetin, newest first.