Correlation of 25-Hydroxyvitamin D Levels in Serum Vs Breastmilk in Vitamin D-Supplementation Breastfeeding Women during Lactation: Randomized Double Blinded Control Trial

Presentation Number: SUN 357
Date of Presentation: April 2nd, 2017

Sathit Niramitmahapanya*1, Surasak Kaoiean2, Varaporn Sangtawesin3, Narisa K Bordeerat4 and Chaicharn Deerochanawong5
1Endocrinology and metabolism Unit , Department of medicine, Rajavithi Hospital, Bangkok, Thailand, 2Division of Maternal Fetal,, Bangkok, Thailand, 3Neonatal Unit,, Bangkok, Thailand, 4Department of Medical Technology, Pathumthani, Thailand, 5Rajavithi Hospital, Bangkok, Thailand


Background: Vitamin D deficiency in pregnancy and lactation increases the risk of adverse perinatal outcomes; however, although Vitamin D supplementation during pregnancy and lactation is recommended, suggested dose ranges vary.

Objective: To determine whether vitamin D3 1,800 IU/d supplementation in lactating mothers improves their vitamin D status and breast–feeding milk.

Materials and Methods: This was a randomized, placebo–controlled study of Thai pregnant women in their third trimester. A total of 76 Thai lactating mothers and their breast–fed infants were studied with maternal 25 Hydroxyvitamin D 25(OH)D levels of 10-30 ng/ml determined using Liquid Chromatography Mass Spectrometry Tandem (LC–MS/MS). One group received vitamin D3 1,800 IU/d supplementation for 6 weeks, and members of the other group were given a placebo. 25(OH)D level of colostum and 6-week serum from breast–fed milk were measured by High Performance Liquid Chromatography (HPLC). The data from the two groups were analyzed and compared.

Results: The mean (±SD) maternal age was 27.16±5.13 years, and mean body mass index (BMI) was 22.29 +5.08 kg/m2. At 6 weeks, maternal 25(OH)D levels had increased significantly in the vitamin D group (VD) 68.30±15.40 nmol/L compared to 55.15±13.57 nmol/L in the placebo group (p<0.001) measured using the Liquid Chromatography-Mass Spectrometry Tandem (LC-MS/MS) method. Breast-fed milk did not show any significant incremental change in 25(OH)D levels measured by High Performance Liquid Chromatography (HPLC); however, the change in 25(OH)D levels in breast milk in the VD group was significantly different from that of the placebo group (p=0.005).

Conclusion: Vitamin D3 supplementation during lactation can increase 25(OH)D levels in Thai breast–fed mothers. Further work is needed to determine the duration of vitamin D supplementation to normalize breast milk and breast–fed infants’ 25(OH)D level at over 75 nmol/L.


Nothing to Disclose: SN, SK, VS, NKB, CD