Seasonal Differences of 25-Hydroxyvitamin D Concentrations in Children and Adolescents from Mexico City and Metropolitan Area.

ABSTRACT:

Introduction

Vitamin D deficiency is associated with bone metabolism and immune disorders. Radiation's seasonal variation affects vitamin D status more at the poles. In Mexico, near the equator, there have been reports of 10-20% vitamin D deficiency in children. There is no consensus on the definition of vitamin D deficiency, different organizations consider that a vitamin D level should be above 20-30 ng/mL. This study aimed to analyze vitamin D serum concentrations in children and adolescents from Mexico City and the Metropolitan Area (MA) during different seasons.

Methods

Cross-sectional study in children and adolescents aged 5-20 years from Mexico City and Metropolitan Area, from autumn 2016 to winter 2017. Variables of interest such as anthropometric measurements, food

SUBMITTER: Montiel-Ojeda D 

PROVIDER: S-EPMC12011372 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature