Phytate-free nutrition: A new paradigm in monogastric animal production

•A definition for the term ‘phytate-free nutrition’ is offered.•Nutritional and physiological effects of the ingestion of phytic acid are explored.•Factors which contribute to ‘extra-phosphoric’ effects of phytase are described.•Phytase dosing and the interactive effects of phytic acid concentration is discussed.•Practical guidance on phytase use and interacting nutritional factors are considered.