An effective remedy for diarrhoea is the use of buttermilk. It is the residual milk left after the fat has been removed from yoghurt by churning. It helps overcome harmful intestinal flora and re-establish the benign or friendly flora. The acid in the buttermilk also fights germs and bacteria. It may be taken and mixed with a pinch of salt three or four times a day for controlling diarrhoea. Should buttermilk be unavailable, eat yoghurt. This fermented food provides useful bacteria that displace the micro-organisms that cause digestive infections. Eating yoghurt just three times a week in any amount maintains the needed bacteria for intestinal health.