Yoghurt
Yogurt', or 'yoghurt', is a dairy product made by bacterial fermentation of milk. The lactose in the milk becomes lactic acid when it is fermented. Lactic acid acts on the protein in the milk to make yoghurt thick and sour. Yoghurt made from cow's milk is called dairy yoghurt. It is produced using a culture of 'Lactobacillus delbrueckii' subsp. Soy yoghurt is made from soy milk.