Vitamin D lowers chances of viral infection
Immune receptors function better with higher vitamin D levels
by Newsletter Editor
Because vitamin D levels decline in the fall and winter when there is less and weaker sunlight, people may catch cold more easily, doctors said. In the first phase of this two-part study, researchers measured vitamin D levels in three healthy groups: young people aged 20 to 30, middle-aged people 31 to 59, and older adults aged 60 to 86, and found circulating vitamin D levels decreased with age.
In the second phase of the study, using the same group of volunteers, doctors found that the special immune receptors designed to intercept and kill viruses were more likely to function normally as levels of vitamin D increased.