Clinical Evidence of Skin Improvements With a Biologically Active Multimodal Topical Skin Treatment.

BACKGROUND: Antiaging skin treatments are continuously in development to meet the needs of an aging population and counteract cosmetic effects of glucagon-like peptide-1 receptor agonists. Peptide Facial Refining Concentrate (ST26-PF-F1) serum contains multiple bioactive peptides within a penetrative delivery system. A clinical study of ST26-PF-F1 assessed its effects on skin health/appearance and tolerability/usability. METHODS: This noncomparative 12-week study enrolled healthy females aged 45 years or older, Fitzpatrick phototypes I–VI, with evidence of skin aging. Participants applied ST26-PF-F1 twice daily. Efficacy (expert evaluation, instrumental measurements, confocal microscopy, and participant self-assessments) and tolerability/safety (dermatologist and participant reporting) were assessed at weeks 2, 4, 8, and 12. RESULTS: Statistically significant improvements from baseline were observed for expert evaluator global assessments of fine lines, skin elasticity and plumpness, and facial contour and facial sagging (all time points); and wrinkles and skin firmness (weeks 4, 8, and 12). Significant improvements were also observed in skin hydration and elasticity (all time points); wrinkle volume, depth, and skin texture (weeks 4, 8, and 12); and lifting effect and V-shape (week 12). Confocal microscopy showed statistically significant improvements in interkeratinocyte brightness, papilla morphology, and dermal collagen fibers at weeks 4 and 12 and surface uniformity and keratinocyte morphology at week 12. Participants reported skin improvements across multiple measures and overall product satisfaction. ST26-PF-F1 was well tolerated with no treatment-related stinging, itching, or discomforting sensations. CONCLUSION: Clinical, instrumental, and microscopy assessments of ST26-PF-F1 demonstrated wrinkle-modulating and filler-like effects, visibly more balanced-looking facial geometry, favorable tolerability, and user satisfaction.