Age and Hydration dependence of jowl and forearm skin firmness in young and mature women

Summary Background Quantitative assessment of possible linkages between skin's firmness and water content is useful for cosmetic and clinical purposes and to better understand features of advancing age. Objectives Our goals were to characterize age‐related differential features in skin firmness in women and determine the relationship between skin firmness and indices of skin water. Methods Skin firmness was quantified using handheld devices that measure the force to indent skin 0.3 and 1.3 mm (F0.3 and F1.3). Skin hydration was quantified using handheld devices that measured tissue dielectric constant (TDC) at 300 MHz to skin depths of 0.5 and 2.0‐2.5 mm. All parameters were measured bilaterally in the jowl area and volar forearm of 60 women grouped by age