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

Authors

Zein E Obagi, Raffi J Balian, Susan V Ramsey, Frederick W Woodin, Grace H Nguyen

Published in

Journal of drugs in dermatology : JDD. Volume 25. Issue 9. Pages 814-820. Sep 01, 2026.

Abstract

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.
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.
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.
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.

PMID:
42696340
Bibliographic data and abstract were imported from PubMed on 05 Sep 2026.

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