Journal of Cosmetic Science The Official Journal of the Society of Cosmetic Chemists Volume 73 No. 1 | January/February 2022 PREFACE Letter from Out-Going Editor-in-Chief Paolo U. Giacomoni | pp. 1 Letter from Incoming Editor-in-Chief Trefor Evans | pp. 2 ORIGINAL ARTICLES Comparative Clinical Evaluation of Centotheca lappacea Extract Cream for Skin Lightening and Tightening Effects in Asian Women: A Randomized, Double-Blind, Controlled Study Oraya Kwangsukstid, Walaiorn Pratchayapruit, Thavatchai Kamoltham, Monthaka Teerachaisakul, Aurachorn Inkanuwat | pp. 3 The Design, Preparation, and Performance Testing of Hand Creams to Slow the Spread of Pathogenic Microorganisms Xiaokang Wang, Zhigang Yin, Taijun Zhang, Shuang Gao, Hengyu Qian, Tongyan Zhang, Ruijuan Wang, Jing Zhou | pp. 17 Does Encapsulation of Propolis Flavonoids into Poly-Lactide-Co-Glycolide Nanoparticles Enhance Sun Protection Factor of Propolis-Based Sunscreen Formulations? Asa Chavoshi, Meysam Soleimani, Mojdeh Mohammadi, M.R. Mozafari, Reza Mahjub | pp. 35 REVIEW ARTICLE Potential Blue Light Effects on Aging Mechanisms Within Adult Human Skin, a Literature Review Elisabeth Stevens | pp. 49