“…High concentrations of proteolytic enzyme (papain and chymopapain), vitamins, minerals and β‐carotene have been reported in papaya (Kamaruzzaman et al., ; Mokbel & Hashinaga, ; Serrano & Cattaneo, ). Papaya peel is reported to have anthelmintic, antibacterial and anticoccidial activities (Chota et al., ) probably due to the presence of polyphenols, mainly catechins (Ahn, ; Chukwuka, Iwuagwu, & Uka, ; dos Santos, de Abreu, Freire, Queiroz, & Mendonça, ). Major antinutritional factors in papaya peel are phenolic compounds, mainly tannins (Chukwuka et al., ; dos Santos et al., ), alkaloids, saponins and flavonoids (Chukwuka et al., ).…”