Fig. 5From: Difference between the biologic and chronologic age as an individualized indicator for the skincare intensity selection: skin cell profile and age difference studiesChanges in the number of epidermal keratinocytes CD49f + (a) and activated epidermal keratinocytes CD49+HLA-DR+ (b) with the biologic and chronologic age difference BA-CA. Squares (linear fit: double-dotted line)—male participants; diamonds (linear fit: dashed line)—female participants. Note that a large positive difference BA-CA corresponds to early ageBack to article page