Cytotoxicity and morphological effects induced by carvacrol and thymol on the human cell line Caco-2

•Carvacrol and its mixture with thymol cause cytotoxic effects in Caco-2 cells.•Caco-2 cells exposed to carvacrol and thymol undergo ultrastructural changes.•Carvacrol, thymol and their mixture induce apoptosis in human intestinal cells Caco-2.