30 May 2011
Men with high vitamin D blood levels have a higher sperm motility compared with vitamin D deficient men, according to a new Danish study.
The study explored the correlation between sperm motility and serum vitamin D levels in 300 healthy men (1). The results showed that men with high vitamin D levels, up to 75 nmol/l, had a significantly higher sperm motility compared with men deficient in vitamin D, i.e. levels below 25 nmol/l.
The researchers commented that these findings are not sufficient to determine whether vitamin D supplements may improve sperm quality in normal or infertile males. This study is only one in a series of studies to determine if vitamin D is necessary for male reproduction. More research is needed to identify relevant factors and conduct placebo-controlled trials to clarify whether vitamin D supplements could be beneficial for infertile men.
Several studies have indicated positive associations between various treatments such as antioxidants, zinc, various vitamins and semen quality. However, there is currently no known medical treatment proved to improve semen quality in randomized controlled trials.
1 September 2012
There has been more written and published over the efficacy of vitamin D than over that of most nutrients. Dozens of randomized, controlled trials have been conducted – some large, many small. Unfortunately, the results of many studies have been inconsistent – some positive, some null, and one or two actually negative.
8 October 2014
A new US review concludes that an increase of calcium intake may reduce the risk of developing colon cancer.
5 November 2014
A new study from Mexico reports that a daily dose of vitamin D seems to decrease blood triglyceride concentrations of post-menopausal women with an increased risk of heart disease.
