IL17A and vitamin D deficiency: Despite this, we did not find any baseline associations between vitamin D status and leukocyte profile parameters, PLT count, CRP, IL-10, and IL-17 levels in the whole study group, and we noticed that in participants with severe baseline vitamin D deficiency (serum 25(OH)D values below 15 ng/ml) 25(OH)D levels were inversely related to CRP values.