Quercetin is a natural occurring compound found in variety of plant foods such a sapples, berries, citrus fruits, red grapes, tomatoes, and onions, kale, broccoli, cabbage, bell peppers, almonds, and olive oil. Quercetin is strong antioxidant that has anti-inflammatory, antihistamine, antiviral properties as well as supporting immune, cardiovascular, and gastrointestinal health.
Quercetin supplementation at doses 1000mg daily have been shown to lower the incidence of upper respiratory infections caused from cold/flu viruses in individuals under significant physical and mental stress. Quercetin interacts synergistically with vitamin C and zinc to produce its antiviral activity. There is emerging evidence to suggest that Quercetin, Vitamin C, and Zinc maybe indeed helpful in the prevention and early treatment of Covid-19.
Quercetin has been shown block the action of histamine and other immune- related inflammatory chemicals. Excessive histamine caused from allergies produces a wide range of common symptoms such as cough, water eyes, sneezing, runny nose, hives, itchy skin, gastritis, swelling, and edema. Although the evidence is not conclusive may individuals who supplement with quercetin find relief from seasonal allergies, gut and skin related food allergies, allergy induced asthma, and pain and inflammation caused from osteoarthritis.
Quercetin has been widely studied in the promotion of cardiovascular health. Diets high in this plant compound been shown to reduce the risk of death from coronary heart disease. There are several ways that quercetin can help preventive heart disease. For instance, quercetin at doses greater 500mg daily has been shown to lower blood glucose levels, cholesterol levels, high blood pressure with greatest effects seen in those with the metabolic syndrome and diabetes.
Quercetin also has anti-platelet effect and can affect metabolism of certain prescription medications. For individuals on prescription medicines, especially on blood thinning agents, should ideally consult with their doctor or pharmacist before using quercetin to ensure that it is safe and appropriate.
About The Author
Farid Wassef is a pharmacist who has been practice in Stouffville since 1989. Farid is the coauthor of Breaking the Age Barrier, Strategies for Optimal Health, Energy, and Longevity (Penguin 2003). In 2006 Farid was honoured as the Canadian Pharmacist of Year for his excellence in patient care. He has been invited to appear on a number of radio and television programs, which includes CBC, CTV, Global, the Health Discovery Channel, and TVO concerning health promotion, disease prevention, and the safe and effective use of prescription medicines and natural health products. Currently, he continues to provide patient care via telephone consultations.
Farid Wassef BSc Pharm, RPh
Stouffville IDA Pharmacy
faridwassef@gmail.com