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

BMC Pediatrics

Research Article

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

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

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

DOI  :  10.1186/1471-2431-12-6

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

来源: Springer

【 摘 要 】

BackgroundTo 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.MethodsWe 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.ResultsCord 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.ConclusionLow 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.Trial RegistrationClincalTrials.gov NCT00697294

【 授权许可】

CC BY   
© Abrams et al; licensee BioMed Central Ltd. 2012