Reflections on Vitamin D3 Requirements

Vitamin D3, in the form of cholecalciferol or 25-hydroxyvitamin D3, without including the active form 1,25-dihydroxyvitamin D3, is included in the European list of authorized additives, with maximum doses allowed according to animal species and age. The current requirements are based on minimum daily needs for adequate performance.   So, Why has research and practice…