Lower prevalence of vitamin D insufficiency in German patients with systemic mast cell activation syndrome compared with the general population.

The study compares the prevalence of vitamin D insufficiency between German patients with systemic mast cell activation syndrome (MCAS) and the general population. The research reveals that individuals with MCAS have a lower prevalence of vitamin D insufficiency despite the common belief that chronic illnesses might lead to more vitamin deficiencies. This finding is significant for clinicians as it challenges the assumption that patients with MCAS are necessarily at a higher risk of vitamin D insufficiency compared to the general population, potentially impacting the management and nutritional assessment strategies for these patients.