15 June 2014
21 March 2013
According to a new study from the UK there is no evidence that women’s blood vitamin D concentrations during pregnancy are associated with the offspring’s total body or spinal bone mineral concentrations. However, experts recommend vitamin D supplementation during pregnancy to support both maternal and fetal bone health.
The observational study measured 25-hydroxyvitamin D blood levels of 3960 pregnant women in all tri-mesters (1). At an average age of nine years and 11 months, their children’s bone mineral content (BMC) was assessed by dual-energy X-ray absorptiometry. The study results showed no significant association between the mothers’ vitamin D levels and their children’s BMC. The vitamin D levels of the women were on average lowest during their first trimester, and then increased as the pregnancy progressed; as expected, levels were higher when measured during summer months and lower when measured during winter months. Although non-white mothers and those who smoked during pregnancy tended to have lower vitamin D levels overall, this appeared to have no effect on their children’s bone health.
The researchers commented that health guidelines may be overstating the importance of vitamin D supplementation in pregnancy, saying there is no strong evidence that pregnant women should receive vitamin D supplementation to prevent low BMC in their offspring. However, there could be other possible beneficial effects of vitamin D in pregnant women, they said.
Previous studies on maternal vitamin D status and offspring’s bone health have produced inconsistent results. Experts recommend routine vitamin D supplementataion for pregnant women who are at increased risk of deficiency. Currently, the American College of Obstetrics and Gynecology and the Institute of Medicine recommend 600 IU of daily vitamin D supplementation during pregnancy to support maternal and fetal bone metabolism (2). Vitamin D supplementation has been suggested to prevent pre-eclampsia, gestational diabetes, impaired glucose tolerance, gestational hypertension and even death among mothers, and preterm birth, infection or death of newborns.
15 June 2014
31 August 2011
A new study from the UK shows that increasing vitamin A in the diet of millions of children could lead to an increase in life expectancy in various countries around the world.
7 June 2011
In highly developed countries the risk of inadequate micronutrient consumption during pregnancy remains very high, criticize health professionals.