Polyphenols & Immunity
Polyphenols are a broad range of plant flavonoids that have antioxidant properties as well as being anti-inflammatory. One of which is Quercetin, which has taken the interest of researchers, as it shows some evidence of strong anti-pathogenic effects. Limited research has been done at this stage, but some work in humans has shown reductions in upper respiratory tract infections during intense training periods.
Research suggests that quercetin might have antioxidant, antiviral, anti-inflammatory, and immunomodulatory effects. It might also inhibit platelet aggregation. Quercetin has very low oral bioavailability, meaning it doesn’t absorb well when eaten, but combining it with sunflower lecithin increases this absorption by as much as 20 times.
Quercetin is found in many fruits, vegetables, and spices, including citrus fruits, apples, onions, berries, broccoli, cilantro, and dill, as well as beverages, tea, and red wine.
- Guide to Athletic Supplements
- Supplements and the Athlete's Immune System — some supplements are thought to prevent exercise-induced immune suppression and provide protection from infection.
- Vitamin Supplementation — the good and the bad.
- Antioxidants — all about antioxidant supplementation and performance