Effects of ethnicity and vitamin D supplementation on vitamin D status and changes in bone mineral content in infants

BMC Pediatrics

Thomas O Carpenter²  Penni D Hicks¹  Stefanie P Rogers¹  Keli M Hawthorne¹  Steven A Abrams¹ 

[1] Department of Pediatrics, Baylor College of Medicine and Texas Children's Hospital, Houston, Texas 77030, USA;Departments of Pediatrics (Endocrinology) and Orthopedics and Rehabilitation, Yale University School of Medicine, New Haven, CT 06511, USA

关键词: bone mineral content;    vitamin D;    breastfeeding;   

Others  :  1178941
DOI  :  10.1186/1471-2431-12-6

 received in 2011-10-28, accepted in 2012-01-16,  发布年份 2012

【 摘 要 】

Background

To evaluate the effects on serum 25(OH)D and bone mineralization of supplementation of breast-fed Hispanic and non-Hispanic Caucasian infants with vitamin D in infants in Houston, Texas.

Methods

We measured cord serum 25(OH)D levels, bone mineral content (BMC), bone mineral density (BMD) and their changes over 3 months of life with 400 IU/day of vitamin D3 supplementation.

Results

Cord serum 25(OH)D was significantly lower in Hispanic than non-Hispanic Caucasian infants (16.4 ± 6.5 ng/mL, n = 27, vs 22.3 ± 9.4 n = 22, p = 0.013). Among 38 infants who completed a 3 month vitamin D supplementation intervention, provision of 400 IU/day of vitamin D increased final 25(OH)D to a higher level in non-Hispanic Caucasian compared to Hispanic infants. There was no significant relationship between cord serum 25(OH)D and BMC or BMD in the first week of life (n = 49) or after 3 months of vitamin D supplementation.

Conclusion

Low cord 25(OH)D levels are seen in Hispanic infants, but their functional significance is uncertain related to bone health in a southern US setting. Daily vitamin D intake of 400 IU during the first months of life appears adequate to increase serum 25(OH)D and support BMC increases despite low initial 25(OH)D levels in some infants.

【 授权许可】

   
2012 Abrams et al; licensee BioMed Central Ltd.

【 图 表 】

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