Sweet orange (Citrus sinensis) peel is a major source of vitamin C and pectin that is a non-digestible carbohydrate that stimulates the growth of probiotic bacteria in the colon. Specific applications studied in poultry include:
Deworming: Using citrus peel extract (600-1200 mg/kg for 14 days) resulted in a significant reduction in Ascaridia galli (roundworms) loads in infected chickens.
Immune enhancement: Dietary supplementation of sweet orange peel extract (1000 ppm) may improve immunity.
Antioxidant: Dried orange residues were shown to improve some performance (e.g. feed intake and body weight gain), decrease liver and abdominal fat and also serum triglyceride level.
Ochuko L. Erukainure MSc, Osaretin A.T. Ebuehi PhD, M. Iqbal Choudhary PhD, M. Ahmed Mesaik PhD, Ahmed Shukralla MSc, Al Orange Peel Extracts: Chemical Characterization, Antioxidant, Antioxidative Burst, and Phytotoxic Activities. Journal of Dietary Supplements (2016)