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Q & A: Quercetin


Quercetin is a flavonol found in many fruits, vegetables, leaves, and grains. It can be used as an ingredient in supplements, beverages and foods.
Q: What is the regular specification of Quercetin?
A: Specification: 95%Quercetin

Q: Please specify the plant extract which has quercetin.
A: Sophora japonica extract,Golden Rod Extract, Guava leaf extract.etc

Q: What is the test method of Quercetin?
A: HPLC & UV-vis

Q: How do you dry this extract?
A: Spray drying

Q: What is the function?
A: 1,As an anti-oxidant,mainly used for oil, beverages, cold drinks, meat processing products.
2, It could be used as an natural pigment
3, This product has a good expectorant, cough effect, and have a certain role in asthma
4, Anti-tumor and anti-cancer.

Q: How about shelf life?
A: 2 years if sealed and store away from direct sun light.

Q: Could you give me details of extraction and solvent type for andrographis paniculata?
A: Method of Extraction: Hydro-alcoholic
Solvent Type: Grain alcohol/Water
We can offer you specification sheet and COA for Quercetin.