Olea europaea



  • Antibacterial
  • Antidiabetic
  • Anti-inflammatory
  • Antihypertensive
  • Antifungal
  • Antioxidant
  • Antiparasitic
  • Antitumor
  • Immunity
  • Kidney-protection
  • Gastroprotective
  • Cardioprotective
Olives are small fruits produced by the olive tree (Olea europaea), a deciduous tree or shrub that is native to the Mediterranean region. Olive trees, and their various parts, have been used in traditional and contemporary medicine for a wide range of ailments. Specific applications relating to poultry include:
  • Cardiovascular Support: A study conducted in 2012 on the effects of supplementing broiler chickens' diets with 10 g/kg of dietary olive leaves, showed that it had an anti-hypertensive effect and decreased incidences of ascites in chickens exposed to cold ambient temperatures.
  • Egg quality: Adding 1-3% olive leaf powder to the diet of 120 laying hens for 8 weeks showed that it helped to reduce egg yolk cholesterol content and egg yolk coloring agent.
  • Antimicrobial: Olive oil leaf extract has demonstrated strong antimicrobial activity against Campylobacter jejuni and Staphylococcus aureus (including methicillin-resistant S. aureus.

Poultry Specific Studies

TypePlant PartDosageSpecific useResultsRef
Chickenscrushed leaves1 g/kg dietimmunityImproved immunity against infection with E. coli.E Elsaaed et al., 2014
Broilersleaf extract600 mg/kg dietGI healthdecreased the caecal E. coli contentG Erener et al., 2020