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Phytochimie et composés bioactifs

Quercetin

Major anti-inflammatory flavonol present in onions and apples.

Definition

Quercetin is a flavonol among the most abundant polyphenols in food. It acts as a powerful antioxidant and anti-inflammatory agent present in the skin of many fruits and vegetables.

How it works

Quercetin is one of the most studied and consumed flavonoids by humans. Its concentration is particularly high in the skin of food items, justifying the importance of consuming them without systematic peeling. This compound exerts a dual action: antioxidant (neutralizing free radicals) and anti-inflammatory (reducing inflammatory mediators). Quercetin shows particular interest in seasonal allergy, stabilizing mast cells that produce histamine. Studies also suggest a beneficial role in blood pressure, endothelial function, and preventing cognitive decline. Bioavailability significantly increases in association with healthy fats.

Role

Reducing chronic inflammation and stabilizing allergic reactions.

Examples

  • Red onion
  • Apple
  • Capers
  • Green tea
  • Broccoli
  • Black raisin
  • Tomato

Recommendations

Consume regular red onions (main source) and apples with their skin to optimize quercetin intake. Associate it with healthy fat sources (olive oil, avocado) to improve absorption. For people prone to seasonal allergies, increasing consumption during the critical period may be beneficial.

Key takeaway

Red onion quercetin is your ally against inflammation and seasonal allergies.

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