Photoaging

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 purpose of the study is to investigate the impact of the injection of dermal filler on the quality of the skin dermal extracellular matrix in persons between the ages of 30-50 years. The quality of the dermal extracellular matrix will be assessed following injection of dermal filler compared to injection of saline vehicle.

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.