Quercetin (CAS 117-39-5) Suppliers and Product Information

Quercetin is a flavonoid compound found in various plants, particularly in red onions and buckwheat. It is used in dietary supplements and has potential antioxidant and anti-inflammatory properties. Quercetin is also being studied for its possible effects on cardiovascular health and cancer prevention, although more research is needed to confirm its efficacy in humans.

Frequently Asked Questions about Quercetin

Q: What are the main sources of quercetin?

A: Quercetin is found in various plant-based foods, with high concentrations in red onions, buckwheat, and certain varieties of honey made from eucalyptus and Melaleuca flowers. It is also present in red wine, with content varying depending on grape variety and maceration process.

Q: How is quercetin typically ***yzed?

A: Quercetin is commonly ***yzed using High-Performance Liquid Chromatography with UV detection (HPLC-UV). For example, in onion powder, the limit of quantification can be as low as 10 ppm.

Q: What are some potential applications of quercetin?

A: Quercetin is being studied for its potential as an antitumor agent and its ability to induce apoptosis. It is also known to inhibit the synthesis of heat shock proteins and act as a non-selective PI 3-kinase inhibitor.

Q: Are there any safety concerns with quercetin?

A: While quercetin is generally considered safe when consumed in foods, high doses in supplement form may cause side effects. It's important to consult with a healthcare professional before using quercetin supplements, especially if you have pre-existing health conditions or are taking medications.