Background: "Natamycin" is a preservative used in Iranian Yoghurt Drink (Doogh) to control the yeast and mould growth. The usage of preservatives is forbidden in Doogh due to some adverse affect on consumer health referring to Iran- Food and Drug Organization rules. But some food manufacturers use preservative such as natamycin in Doogh. ; Methods: In summer 2012, the present study was ...
