Egert, S., Bosy-Westphal, A., Seiberl, J., et al. (2009). The British journal of nutrition, 102(7), 1065-1074. “Quercetin reduces systolic blood pressure and plasma oxidised low-density lipoprotein concentrations in overweight subjects with a high-cardiovascular disease risk phenotype: a double-blinded, placebo-controlled cross-over study.”

Participants: Overweight subjects with a high-cardiovascular disease risk phenotype. Outcome: Quercetin was found to be well-tolerated, and it reduced systolic blood pressure and plasma oxidized low-density lipoprotein concentrations. Link to Study

Sahebkar, A., Serban, M. C., Gluba-Brzózka, A., et al. (2016). Journal of Nutrition, 146(6), 1231-1240. “Effect of Quercetin Supplementation on Plasma Lipids, Blood Pressure, and Glucose Concentration: A Systematic Review and Meta-Analysis.”

Outcome: Quercetin demonstrated a favourable safety profile and showed beneficial effects on lipid profiles, blood pressure, and glucose concentration. Link to Study

Wang, Y., Xie, J., Li, Y., et al. (2017). Pediatric Research, 81(4), 601-606. “Supplementation of quercetin with vitamin C and niacin does not prevent rhinitis in children with a history of allergic diseases.”

Participants: Children with a history of allergic diseases. Outcome:The study demonstrated that quercetin, in combination with vitamin C and niacin, was safe and well-tolerated, although it did not prevent rhinitis in the studied population.  Link to Study

Gates, M. A., Tworoger, S. S., Hecht, J. L., De Vivo, I., Rosner, B., & Hankinson, S. E. (2007). A prospective study of dietary flavonoid intake and incidence of epithelial ovarian cancer. International Journal of Cancer, 121(10), 2225-2232 Cohort Study on Quercetin and Cancer Risk

Description: An epidemiological study investigated the correlation between dietary intake of quercetin and cancer risk. Findings: This study associated a higher intake of quercetin with a reduced risk of developing certain types of cancers. Link to Study

Nieman, D. C., Henson, D. A., Gross, S. J., Jenkins, D. P., Davis, J. M., Murphy, E. A., ... & McAnulty, S. R. (2007). Quercetin reduces illness but not immune perturbations after intensive exercise. Medicine & Science in Sports & Exercise, 39(9), 1561-1569.

Description: A study was conducted to evaluate the efficacy of quercetin in reducing the incidence of upper respiratory tract infections. Findings:  The study suggested that quercetin supplementation could reduce the incidence of upper respiratory tract infections in physically active individuals. Link to Study

Boots, A. W., Wilms, L. C., Swennen, E. L. R., Kleinjans, J. C. S., Bast, A., & Haenen, G. R. M. M. (2008). In vitro and ex vivo anti-inflammatory activity of quercetin in healthy volunteers. Nutrition, 24(7-8), 703-710. This study investigated the anti-inflammatory effects of quercetin in humans.

Findings: It found that quercetin has anti-inflammatory properties, which can be beneficial in managing inflammation-related conditions. Link to Study