yogurt food product https://en.wikipedia.org/wiki/Yogurt https://upload.wikimedia.org/wikipedia/commons/thumb/2/23/Cacik-1.jpg/549px-Cacik-1.jpg A dairy product produced by bacterial fermentation of milk. Damion Dooley The bacteria used to make yogurt are known as yogurt cultures. The fermentation of lactose by these bacteria produces lactic acid, which acts on milk protein to give yogurt its texture and characteristic tart flavor. yoghourt yougert yoghurt fermented dairy food product ready for release