An international research team led by Hiroshima University has developed a technique that can reveal extremely early changes in human skin collagen, long before the damage becomes visible under conventional imaging.
The findings, published in ACS Nano on July 16, 2026, suggest that collagen begins losing its precise molecular organization before its fibers become thinner, fragmented, or disconnected. In other words, skin tissue may appear structurally intact even after important changes have already begun at a deeper level.
Hidden Damage Inside Skin Collagen
Collagen is the main structural protein in skin. It forms an intricate network that helps tissue remain strong, flexible, and resistant to physical stress.
Its structure is organized across several scales. Individual molecules assemble into larger bundles, which then form the fibers that support the skin. Because of this layered arrangement, collagen is described as a hierarchical material.
