Serum 25-hydroxyvitamin D and adult-onset atopic dermatitis: insights from two large national cohorts

: Our findings revealed that elevated levels of serum 25(OH)D were robustly associated with a decreased risk of AOAD. These results hold considerable public health implications, indicating that the serum 25(OH)D may offer a practical and efficient means of detecting high-risk individuals and informing tailored intervention strategies.