| abstract |
Disclosed are a probe including a hollow needle having an outer diameter of 0.003 to 0.4 mm and a length of 0.2 to 40 mm, wherein a distal end and a terminal end of the hollow needle are bridged with a salt bridge, an epidermal electric potential measuring device including the probe, an epidermal electric potential measuring method using the epidermal electric potential measuring device, and a cosmetic method using the epidermal electric potential measuring device. |