Maternal vitamin D supplementation and its impact on allergy

To the Editor, With great interest, we read the recent article by Gur et al. (1), “The effect of place of residence and lifestyle on vitamin D deficiency in pregnancy: Comparison of eastern and western parts of Turkey”. The authors discussed the prevalence and the predictive factors of vitamin D deficiency in pregnancy and the compliance with “The National Vitamin D Support Program” in Turkey’s easternmost and westernmost provinces. They found that clothing style, seaside holiday duration, consuming fish, living in high-altitude cold regions, and 1200 IU/day vitamin D supplementation affected vitamin D levels. They also showed that vitamin D deficiency in pregnancy is high in Turkey. They recommended increasing compliance with “The National Vitamin D Support Program” at the followup of all pregnant women.