In this podcast Malcolm Macdonald talked to SAC Nutritionist Mary Young and Norvite Technical Director David McClelland about minerals in ruminant rations. This included an overview of the major minerals which are supplemented in ruminant rations and these benefit anima health. David then outlines how minerals and vitamins are defined and can be used in an organic context. Mary and David both outline case studies on specific deficiencies and how they were rectified.