DEFINITION OF VITAMIN D DEFICIENCY IN SCHOOLCHILDREN: SYSTEMATIC REVIEW WITH META-ANALYSIS.
Marcela Almeida LindenRenata Germano Borges de Oliveira Nascimento FreitasGabriel HesselDenise Barbieri MarmoMaria Ângela Bellomo-BrandãoPublished in: Arquivos de gastroenterologia (2020)
The most common definition in the literature of 25(OH)D deficiency in schoolchildren was at levels below 20 ng/mL. No side effects have been reported in studies that used fortification and/or vitamin D supplementation. Daily supplementation is more effective than seasonal supplementation. However, more studies are needed to define what can be considered as optimal levels of 25(OH)D in children.