sentence: Lactic acid acts on the protein in the milk to make yoghurt thick and sour.
sentences_before: 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.
sentences_after: 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.
concept_name: lactic acid
headings: Yoghurt
categories: Dairy products