Certain ethereal oils are good for the digestion, stimulating the secretion of bile and enzymes in the intestine. This improves digestion, and so the food can be used in a better way. Disturbances in the digestive system pave the way for a great number of harmful micro-organisms and endoparasites. Digestive disorders can come about in stressful situations in particular, these being expressed in more or less severe cases of diarrhoea.