Peptides for skin and beauty: evaluate the finished product

In the small GHK-Cu study after laser resurfacing, objective assessments did not show a significant between-group wrinkle or overall skin-quality advantage, although patient satisfaction was higher with the copper-peptide regimen. Reporting both findings gives a more useful picture than calling the trial proof of rejuvenation.

A topical skin-care product and an injected preparation create different exposures. A paper about one cannot validate the other. Similarly, rat wound-chamber findings concerning connective tissue do not establish wrinkle reduction from a commercial facial serum.

Check the active ingredient, concentration, formulation, duration, comparator and method of assessment. Standardized images and blinded ratings reduce some interpretation problems; testimonials answer a different question. A branded product should not borrow evidence from an unrelated preparation simply because both mention peptides.