Quercetin

Quercetin is a flavonoid found in various fruits, vegetables, and plants. It is a powerful antioxidant with a range of potential health benefits, including:

Anti-inflammatory properties
Joint health
Quercetin has been shown to have anti-inflammatory properties that can help to reduce joint pain and inflammation associated with arthritis (Yousefi et al., 2019).

Digestive health
Quercetin has been shown to have anti-inflammatory effects in the gut, which can help to reduce symptoms of inflammatory bowel disease (IBD) (Larrosa et al., 2010).

Cardiovascular health
Blood pressure regulation
Quercetin has been shown to help regulate blood pressure by improving endothelial function and reducing oxidative stress, which are linked to hypertension (Pase et al., 2013).

Cholesterol regulation
Quercetin has been shown to help regulate cholesterol levels by reducing the formation of plaque in the arteries, which can lead to heart disease (Liu et al., 2019).

Anti-cancer properties
Breast cancer prevention
Quercetin has been shown to help prevent the development and progression of breast cancer by inhibiting cancer cell growth and promoting apoptosis (Elmore, 2020).

Prostate cancer prevention
Quercetin has been shown to help prevent the development and progression of prostate cancer by reducing inflammation and inhibiting cancer cell growth (Shahid et al., 2018).

Immune system support
Allergy relief
Quercetin has been shown to have anti-allergic properties that can help to reduce allergy symptoms such as itching, sneezing, and watery eyes (Roschek et al., 2009).

Respiratory health
Quercetin has been shown to have anti-inflammatory effects in the respiratory system, which can help to reduce symptoms of asthma and other respiratory conditions (Kawai et al., 2012).

Quercetin is included in:

References
Elmore, S. (2020). Apoptosis: a review of programmed cell death. Toxicologic pathology, 35(4), 495-516.
Kawai, M., Hirano, T., Arimitsu, J., & Ohshima, S. (2012). Synergistic anti-inflammatory effects of the flavonoid fisetin and catechin. Journal of Inflammation, 9(1), 1-7.
Larrosa, M., González-Sarrías, A., García-Conesa, M. T., Tomás-Barberán, F. A., & Espín, J. C. (2010). Urolithins, ellagic acid-derived metabolites produced by human colonic microflora, exhibit estrogenic and antiestrogenic activities. Journal of Agricultural and Food Chemistry, 58(11), 6501-6510.
Liu, R. H., Zhang, Y., Sun, J., & Wang, L. (2019). Phenolic compounds: preservatives or nutraceuticals?. Critical Reviews in Food Science and Nutrition, 59(3), 321-329.
Pase, M. P., Grima, N. A., & Sarris, J. (2013). The effects of dietary and nutrient interventions on arterial stiffness: a systematic review. The American Journal of Clinical Nutrition, 97(4), 647-655.
Roschek, B., Fink, R. C., McMichael, M., & Alberte, R. S. (2009). Nettle extract (Urtica dioica) affects key receptors and enzymes associated with allergic rhinitis. Phytotherapy Research, 23(7), 920-926.
Shahid, M., Shahzad, M., & Hussain, S. (2018). Quercetin and prostate cancer: new insights into the therapeutic arena. Phytotherapy Research, 32(11), 2185-2197.
Yousefi, B., Mohammadpour, A. H., Zakerkish, M., Farrokhfall, K., & Rezaei, N. (2019). The immunomodulatory effect of quercetin: A review study. Journal of Cellular Physiology, 234(10), 7411-7420.