18 November 2013
A new US study reduces concern that vitamin D supplementation may be associated with an increased risk of developing kidney stones.
The observational study measured serum 25-hydroxyvitamin D concentrations in 2,012 men and women of all ages and documented cases of kidney stones for 19 months (1). The study results showed no statistically relevant association between a vitamin D ¨serum level in the range of 20 to 100 ng/mL and the incidence of kidney stones. However, older age, male gender and higher body mass index (BMI) were all risk factors for developing kidney stones.
The researchers commented that mounting evidence indicates a vitamin D serum level between 40 and 50 ng/mL would be needed to substantially reduce the risk of many diseases, including breast and colorectal cancer. According to the scientists, this serum level can generally only be achieved by taking vitamin supple- ments. Individuals with a high BMI need a higher vitamin D intake than their leaner counterparts to achieve the same blood vitamin D concentrations.
19 April 2013
According to a new national nutrition survey 40% of Irish adults have blood vitamin D concentrations that are inadequate for bone health throughout the year with a much higher prevalence during winter.
3 June 2011
Taking vitamins before and/or during the first month of pregnancy may reduce the chances of bearing a child with autism by 50 percent, says a new US study.
9 August 2012
A new US review suggests that the recommended dietary allowance (RDA) for vitamin C be increased by more than 100% of the current levels for adults.
