Fibronectin is a naturally occurring extracellular matrix protein involved in cell adhesion, migration and early wound repair. Its topical application appears to support barrier restoration and coordinated tissue recovery following procedures that temporarily disrupt skin integrity.  

The 28-day split-face study included 32 healthy female participants undergoing IPL. Each participant applied a fibronectin-containing serum to one side of the face and a control serum to the other. Skin hydration, transepidermal water loss, erythema and skin radiance were measured at baseline, immediately after IPL, and at days 3, 7 and 28.  

The fibronectin-treated side showed consistently greater improvements in skin hydration across multiple post-treatment time points, with statistically significant differences compared with the control. Measures of transepidermal water loss, reflecting skin barrier recovery, were significantly lower on the fibronectin side at days 3, 7 and 28. Redness and overall skin radiance also improved more rapidly and to a greater extent on the fibronectin-treated side at later follow-up points.  

Both investigator assessments and participant-reported feedback supported the objective findings, with no adverse events reported during the study period. The regimen was well tolerated, even in the immediate post-procedure phase when the skin barrier is most vulnerable.  

The authors note that the study was limited by its modest sample size and focus on a single procedure type, and that further controlled studies are needed to determine whether similar benefits are seen across other energy-based and procedural treatments.