Higher BMI (p=0.005) in a Japanese AA cohort (n=70) compared to controls (n=70) (26)Higher BMI correlates positively with alopecia disease severity in males (n=189, p=0.01) (27)Lower serum levels of adiponectin (p=0.031) and resistin (p=0.017) with AA (n=65) compared to controls (n=71) (28)Negative correlation between adiponectin serum levels and AA disease severity p<0.05 (28). This evidence concerns the gene RETN and alopecia.