Nutrients
Quercetin
Herbs and Herbal Extracts
Quercetin is a flavonoid found in many fruits and vegetables.
General Background
Exercise stress may lead to increased risk for upper respiratory tract infection. Quercetin can inhibit infectivity and replication of many viruses. The flavonoid may offset the increased susceptibility to viral infection caused by stressful [...]
Flavonoids
Nutrients
Flavonoids
General Background
Flavonoids are polyphenols and commonly found in herbs. Researchers studied the structure-activity relationship (SAR) of 25 flavonoids and their effects on the neuraminidase (NA) gene of influenza virus (Liu et al., 2008). They used three typical influenza virus strains A/PR/8/34 (H1N1), A/Jinan/15/90 (H3N2), and B/Jiangshu/10/2003.
Effects and [...]
