Fatigue and tiredness

Tiredness can be caused by a variety of factors, one of which is a vitamin D deficiency. In contrast to more obvious causes such as stress, depression, and insomnia, vitamin D deficiency is frequently overlooked as a potential cause of fatigue. One study of 480 older adults found a link between vitamin D deficiency and fatigue symptoms. Furthermore, a study of 39 children found that low vitamin D levels were associated with poor sleep quality, shorter sleep duration, and later bedtimes.

One observational study of female nurses discovered a strong relationship between low vitamin D levels and self-reported fatigue. Furthermore, 89 percent of the participants were vitamin D deficient. Interestingly, several studies have found that supplementing with this vitamin may lessen the severity of fatigue in people who are deficient. Even children with vitamin D deficiency are susceptible to sleep problems, according to a study published in the Journal of Clinical Sleep Medicine. This deficiency was linked to decreased sleep duration, poorer sleep efficiency, and even delayed bedtimes. Future research in children should look into whether vitamin D deficiency causes sleep disturbances or the other way around, according to the authors.