Design and Evaluation of a Glycolic Acid Serum for Facial Skin: Analyzing Its Effects on Skin Renewal and Appearance - Saeed, Hasan Abdulghani; Ali, Hosam Hasan; Sarhan, Majid Essam; Saif, Abdul Salam Amin; Abdulrab, Ismail Khaled; Ali, Ali Abdulqader (University of Science and Technology, Sana’a, 2025)