Quercetin, also known as onion extract, is widely distributed in the plant kingdom and is an important medicinal component in the flavonoid family. It is also an important dietary antioxidant. It exists in various foods, including fruits, vegetables, tea, alcohol, and other dietary supplements, and is beneficial for health. The reason why quercetin supplement is eye-catching is its special antioxidant, anti-inflammatory, and anti allergic effects. It is one of the top plant nutrients and is known as a natural antihistamine, which is also the key to making these vegetables and fruits a superfood. Specification of Quercetin Name: Quercetin CAS: 117-39-5 Molecular Formula: C15H10O7 EIENCS: 204-187-1 Specification: 98% Grade: Food Grade Certificate: COA MSDS Test Method: HPLC Efficacy and Function of Quercetin Quercetin, as a kind of Nutritional Powder, also the most common flavonoid compound, has a variety of biological activities, can be antioxidant, and plays an…