Dietary vitamin A intake recommendations revisited: global confusion requires alignment of the units of conversion and expression

Affiliations

• ¹ 1Division of Human NutritionWageningen UniversityPO Box 81296700 EV WageningenThe Netherlands.
• ² 2Center for Studies of Sensory Impairment,Aging and Metabolism (CeSSIAM)Guatemala City,Guatemala.
• ³ 3Yili R&D CenterWageningen,The Netherlands.
• ⁴ 4Sight and LifeBasel,Switzerland.
• ⁵ 6World Food ProgrammeRome,Italy.
• ⁶ 5Center for Human NutritionDepartment of International HealthJohns Hopkins Bloomberg School of Public HealthBaltimore,MD,USA.
• ⁷ 8USDA Human Nutrition Research CenterTufts University,Boston,MA,USA.