Vitamin D Deficiency and Associated Factors Among Postpartum Women in Türkiye: A Primary Care Cross-Sectional Study

Background/Objectives: The postpartum period involves substantial physiological changes that may affect maternal vitamin D status. This study aimed to determine serum 25-hydroxyvitamin D [25(OH)D] levels in postpartum women in Konya, Türkiye, and to identify associated factors.

Methods

In this study, 25(OH)D levels were assessed in 267 women aged 18–49 who visited a family health center at 0–1, 6, 12, and 24 months postpartum. Sociodemographic, obstetric, dietary, and lifestyle data were collected using a structured questionnaire, and sun exposure, skin tone, and physical activity level were assessed using standardized methods.