Photoaging

his observational study examines whether time spent driving is associated with differences in skin hydration between the left and right cheeks in female drivers residing in Florida. In left-hand-drive vehicles, the driver's left cheek is chronically exposed to ultraviolet A (UVA) radiation through the unshaded side window during every daytime driving episode. A prior study by IAS Skin Care (NCT07564869, n=30) found that the left cheek was less hydrated than the right cheek in 60% of participants, suggesting a possible effect of driving-related UVA exposure on facial skin hydration asymmetry. Eighty female drivers aged 25-65 years residing in Florida will be enrolled. At a single visit, skin hydration will be measured at three facial zones (left cheek, right cheek, and forehead as a symmetrical control zone) using the BT-Analyze bioimpedance device. Participants will complete a structured questionnaire on driving habits, sun protection practices, and skin history. The primary outcome is the Hydration Asymmetry Index (HAI = right cheek minus left cheek BT-Analyze score). Associations between driving time, cumulative driving exposure, window tinting, sunscreen use, and HAI will be examined using Spearman correlation, Mann-Whitney U tests, and multiple linear regression.

The objective of this clinical study is to confirm the clinical performance and long-term safety of the CE-marked RRS® HA Long Lasting in the treatment of skin photoaging and its consequences, with a primary focus on improving facial wrinkles and skin quality in healthy adults. The main questions it aims to answer are: the proportion of responders achieving a clinically significant change in facial wrinkles from baseline to Month 2 on both sides of the face; improvement in photodamage compared to the control group at 2 months. Researchers will compare the group treated with RRS® HA Long Lasting to an untreated control group to evaluate the product's effectiveness in improving facial wrinkles and skin quality.

The present study was conducted for analyzing the efficacy and safety of platelet-rich plasma (PRP) and platelet-rich fibrin (PRF) in photoaging therapy. Specific arms: 1. The investigators will compare the photoaging improvement of PRF and PRP treated face before and after treatment by two blinded investigators. 2. The investigators will evaluate the improvement of each parameter of photoaging by Visia system, dermoscope, and optical coherence tomography. 3. The investigators will evaluate the safety of the treatment of PRF and PRP. Each case will receive 3 sessions of injection therapies with one month interval (T0, T1, and T2). Each case will receive PRP therapy on one side of the face and PRF on the other side of face. The investigators will determine the treatment method for both sides of each case randomly by coin flapping before the study. The investigators will evaluate each case before each session of therapy (T0, T1, T2) as well as 1 (T3) and 3 months (T4) after final session of treatment.