I look younger now than I did a year ago before I started. I started at about the same time I started taking a GLP-1. I was trying to get ahead of possible loose skin and the aging look that weight loss can cause. I don't have any loose skin after losing around 60-70 pounds, and am 54 years old. My hair is much thicker than it was before I even began to lose weight.
However, I also did a lot of other things at the same time to try to prevent sagging:
Ran KPV with GHK-Cu, glutathione, Athena, zinc, and vitamin c. I lost less than two pounds a week, exercised, took multivitamins with extra hair, skin and nails vitamins and minerals. Ate healthy, ate an appropriate amount of protein and added an amino acid/collagen supplement.
So I guess I can't say that it was just the GHK-Cu, and truly, most of us who are using it are also using other peptides/supplements at the same time and making other health related changes.
But at about 80 dollars a year, what have I really got to lose? I'm going to keep doing the same things.