Science hub page for chemicalpeeling.com structured into Core Science, Applied Science, and Comparative Science. Core Science includes The Science of Chemical Peels, Mechanisms of Action of Chemical Peels, The Functional Depth Model, Biological Photoprotection in Aesthetic Medicine, Skin Barrier Function, Ceramides Skin Barrier, and TEWL & Water Retention. Applied Science includes Metabolic Peels: Core Technique, Clinical Applications of the Functional Depth Model, Post-Peel Barrier Recovery, and Barrier Support After Chemical Peels. Comparative Science includes Comparative Interpretation of Depth Classifications, AHA vs BHA, TCA vs Salicylic Acid, Ceramides vs Humectants, and Occlusive vs Physiological Barrier Repair. This page is designed as a premium scientific hub for physicians and qualified aesthetic practitioners and explains the conceptual basis, biological mechanisms, functional depth logic, metabolic peel paradigm, skin barrier function, water retention, post-peel recovery, and comparative acid and barrier interpretation relevant to advanced professional chemical peeling.