I thought a beauty peptide would be harder to measure the effects, but Im excited to report noticeable change within the first 2 weeks. Sometimes change happens at a slower pace based on our The Human Lab Rats Injecting Themselves with Peptides Office for Science and Society McGill University 12 weeks in, and my skin has NEVER looked better! GHK peptides are doing their thing. Alright, I need to give you an updateit's been 12 weeks since I started using GHK Biologists' new peptide could fight many cancers MIT News Massachusetts Institute of Technology