• Antioxdiant
  • Antiatherosclerotic
  • Antitumor
  • Antifungal
  • Antiulcer
  • Antiviral
  • Anti-inflammatory
  • Antiarthritis
  • Immunity
  • Gastroprotective
  • Cardioprotective
  • Neuroprotective
  • Vasodilator
Quercetin is a natural plant flavonoid known for its potent antioxidant properties. It is present in many fruits and vegetables, with highest levels in apples, buckwheat and onions. It is a powerful, anti-inflammatory, antimicrobial, anti-obesity, anti-hypercholesterolemic, antioxidant, anti-aging, and anticancer agent and is one of the most commonly used bioflavonoids for metabolic and inflammatory diseases.

Poultry Specific Studies

TypePlant PartDosageSpecific useResultsRef
Hens0.4 g/kg of dietEgg qualitythe combination of quercetin and vitamin E exert synergistic effects on egg production, egg quality, and immune function in aging hens.F Amevor et al., 2021
Hens0.4 g/kg of dietGI healththe combination of quercetin and vitamin E exerted synergistic effects on intestinal morphology by promoting villi height and crypt depth, as well as mitigated the intestinal inflammatory damage of the aged hens.F Amevor et al., 2022
Hens0.4 g/kg of dietEgg productionIncreased egg laying rate, egg quality and reduced yolk cholesterol.Y Liu et al., 2013
Broilers0.2 g/kg of dietGI healthMicrobial population of aerobes and coliforms decreased at higher levels of quercetin, while bifidobacteria increased. Increased antioxidant activity in liver.J Carrasco et al., 2016
Hens0.4 g/kg of dietegg productionSignificant increase in secretion of hormones, oestradiol (E2), progesterone (P4), follicle-stimulating hormone (FSH), luteinizing hormone (LH), insulin-like growth factors-1 (IGF-1) and growth hormone (GH). Increased laying weight. J Yang et al., 2017
Hens0.2 g/kg of dietGI healthIncreased population of Bifidobacteria and decreased the population of total aerobes and coliformsH Liu et al., 2013
Chickens400 mg/kg of dietEgg shelf lifeMay favorably prolong shelf-life of eggs, without any side effects on hen performance and egg quality traits.P Simitzis et al., 2018
Hens0.2-0.6 g/kg diet for 8 weeksEgg qualityDecreased broken or soft-shelled eggs laid in older hens and increased eggshell thickness. Y Ying et al., 2015
Hens0.4 mg/kg of dietGI healthameliorated the LPS challenge-induced intestinal inflammation and improved intestinal functions, possibly associated with its modulation on gut microbiota, particularly the increased population of SCFA-producing bacteria.J Feng et al., 2023
Hens0.5 g/kg diet for 8 weeksantioxidantdecreased MDA concentration as well as increased GSH-Px, GR, GST, and SOD activities and GSH level.H Iskender et al., 2016
Broilers200-400 ppm of dietGI health Enhanced intestinal morphometry by decreasing total coliforms and Clostridium perfringens and increasing Lactobacillus counts. The mRNA expression of intestinal Cu/Zn-superoxide dismutase (SOD1), glutathione peroxidase (GSH-Px) and nutritional transporters, including glucose transporter 2 (GLUT2), peptide transporter 1 (PEPT1), and fatty acid synthase (FAS) genes, were significantly upregulatedM Abdel-Latif et al., 2021
Chickensliver protection, lead toxicityimproved the antioxidant capacity of the liver and alleviate liver tissue damage caused by Pb.P Cai et al., 2021
Chickens0.5 g/kg of dietkidney protectionprotected the kidney of chickens against the nephrotoxic effects caused by ingestion of the mycotoxin ochratoxin A.R Abdelrahman et al., 2022
Broilers250 mg/kg of dietImmunityDecreased abdominal fat content. Increased Lactobacillus counts and the content of total superoxide dismutase (T-SOD) and total antioxidant capacity (T-AOC). S Zhang et al., 2020