Sperm switch into top gear with the sunVeldhoven, 19 May 2011 (SRF) Men who top up on vitamin D in the sun or in a solarium, give their sperm an advantage in terms of motility, speed and penetration force. This was the conclusion of a study conducted by scientists from the University of Copenhagen investigating the role of vitamin D in human sperm production.
The scientists tested the quality of sperm from 300 men chosen at random and a detailed analysis of sperm from a further 40 participants was performed in the laboratory. At the same time the level of vitamin D in their blood was measured.
Almost half of the men had an insufficient level of vitamin D, below 50 nmol/l. The optimum level of vitamin D recommended by most experts is a minimum of 75 nmol/l. The sperm in men with higher vitamin D levels demonstrated significantly better performance in terms of motility and speed. In addition, the number of healthy sperm in men with insufficient vitamin D was considerably lower than in participants with normal levels. The ability to absorb calcium was also inhibited as well as the acrosome reaction which occurs during penetration of the female egg. Tests conducted in the laboratory resulted in similar findings.
Martin Blomberg Jensen et al. (University Department of Growth and Reproduction, Rigshospitalet, Copenhagen, Denmark): “Vitamin D is positively associated with sperm motility and increases intracellular calcium in human spermatozoa”; in: Human Reproduction, 22 March 2011
The Sunlight Research Forum (SRF) is a not-for-profit organisation based in The Netherlands. SRF’s aim is to help bring to the fore, the latest medical and scientific information on the effects of moderate UV exposure on man. It takes time, often decades, for new scientific ideas to be accepted and assimilated, first into the general body of scientific knowledge and finally into policy. We want to reduce this time to a minimum so that the benefits of research can lead to a better understanding of UV effects on man and will become available to the public without any unnecessary delay. We hope to provide policy makers with correct information on which to base national health policy and individuals with better information on which to base choices about their lifestyles.
New research and well founded ideas on moderate UV exposure both indoor and outdoor will be presented and discussed in the Sunlight Research Forum by people working in the health disciplines, by academics and by journalists.
Sunlight Research Forum (SRF)
P.O. Box: 71
5500 AB Veldhoven,
Tel.: +31(0)651 358 180
Fax: +31 (0)40 205 1967
Sunlight Research Forum (SRF)
P.O. Box: 71
5500 AB Veldhoven,
Phone: +31(0)651 358 180
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