Fig. 4

Evaluation of deep skin elasticity evaluation in skin. To evaluate the improvement of the elasticity in deep skin by the test material, we fixed the probe of the Dermal Torque Meter to the right cheek of the face of the subject and measured the elasticity of deep skin by applying rotational force for 10 s at a constant angle and pressure at intervals of 2 weeks before and after use for up to 4 weeks. A ring with a 3-mm gap was attached to the Skin Torque Meter to transmit the rotational force to the dermal layer, and the Ur/Ue value indicating skin elasticity was analyzed. The paired t test was conducted to determine statistical significance(*p < 0.05)