1. The use of diets containing poor-quality ingredients, such as oxidized oil, has negative effects on the intestinal morphology
of the jejunum of turkeys.
2. Added vitamin E (800 mg of vitamin E/kg of feed) in the diet acts as an antioxi-dant to prevent damage to cells in the
intestinal mucosa of turkeys caused by products from the oxidative process.
3. The addition of oxidized soybean oil in the diets of turkeys did not result in a loss of performance at 21 d of age.