Retinol increases cell production and turnover, which causes a natural exfoliation process that removes the dirt and grime that builds up on your skin and clogs your pores
Herrera LJ, Correa AM, Vaporciyan AA, Hofstetter WL, Rice DC, Swisher SG , Walsh GL, Roth JA, Mehran RJ
But their experience is most likely due to the placebo effect instead of the peptides themselves: Research linking GH supplements with better sleep shows it helps only in the case of people with a true GH deficiency
Our results [] showed that [Setria Glutathione] was significantly superior to placebo in its ability to improve wrinkles, at least at some anatomic locations, they wrote in the Journal of Clinical, Cosmetic and Investigational Dermatology