We often associate a vitamin D deficiency with weak bones, but it’s also linked to increased risk of cardiovascular disease, cancer, cognitive impairment in older adults, and severe asthma in children. Vitamin D, or the “sunshine vitamin,” is created in the body after exposure to sunlight, and it can be absorbed from foods like fish and fish liver oils, egg yolks, and from fortified dairy and grain products. Several studies have explored whether or not children with asthma would benefit from increased levels of vitamin D since children with asthma often have low levels of the vitamin. Catching a cold can be especially challenging for asthma sufferers because it can exacerbate or trigger asthma symptoms. Researchers at the University of Wisconsin conducted a recent study to investigate if alleviating the vitamin D deficiency in asthma sufferers would lessen cold symptoms or reduce the number of colds that asthmatics experience.
Researchers at the University of Wisconsin studied the effects of vitamin D on 408 adults with mild to moderate asthma. Study participants received vitamin D on a daily basis or a placebo for a period of 28 weeks. Patients that took vitamin D supplements reached normal levels of vitamin D after 12 weeks. Nearly half of the study participants had at least one cold during the duration of the study, but researchers found that achieving normal vitamin D levels didn’t decrease the number of colds or the severity of colds that patients experienced.
Although increasing levels of vitamin D didn’t reduce the severity or number of colds for asthma sufferers, there are some other steps they can take to prevent colds and manage asthma symptoms if they do catch a cold. Frequent hand washing is one easy way to promote good hygiene and reduce the spread of the cold virus. Asthma sufferers can also work with their doctor to create an asthma action plan that includes a recommendation on how to adjust medication dosage during a cold.