Retrieving the Dynamic Hydration Profile of Skin In Vivo with a Handheld Terahertz Probe

In this work, we measured human skin in vivo with a handheld terahertz probe and demonstrated a method to retrieve the dynamic hydration profile of skin from the raw THz data. We presented the hydration profiles of participants with skin of different Fitzpatrick skin types, and results reveal some correlations between the surface hydration of skin, the thickness of stratum corneum and the skin types.