Chicago (ddp). If you have low levels of vitamin D in the blood, get a cold more easily. Results from the analysis of 19,000 people US researchers have found that. Therefore, the risk of developing a Erkältungskrankheit in subjects with very low concentrations of vitamin in blood was 40 percent higher than in subjects with very high concentrations. However, the relationship was particularly evident in patients with chronic diseases such as asthma or the lung disease COPD. The results are however still not conclude that is administering vitamin D preparations colds prevention would leave, write to adit Ginde researchers from the University of Colorado at Denver in the trade magazine “Archives of internal medicine» (vol. 169, pp. 384).

The scientists resorted to the data of a large, carried out by the American Center for health statistics survey for their study of 19,000 adults and adolescents were medically examined and gave blood samples. On average were the vitamin-D values 29 nanograms per liter of blood, surrendered to the evaluation, which were moving the concentrations between less than 10 nanograms and more than 30 nanograms per litre. The scientists also covered whether the participants in the recent past were suffering from the upper respiratory tract. From this data they expect then demographic and clinical factors and put the data to each other in relationship.

The analysis showed a clear link between the concentration of the vitamin in blood and the risk of catching a cold. This was most evident in asthmatics, who had a five-fold higher risk of a Erkältungskrankheit at low vitamin D values as sufferers with high concentrations of vitamin.

The researchers suspect that the vitamin-D values and the performance of the immune system a correlation between, which might underlie the effect. The researchers can not deliver but still a detailed explanation or mechanism. The data were therefore also not automatically to the conclusion, with vitamin D preparations, you can prevent colds.