Are Ghkcu related to sleep ?

Hi everyone, I’ve been using GHK-Cu for a little over 12 weeks in total. I started on March 5 and continued until May 24. Then I took a short break while traveling, and resumed again from June 1 to June 8, when I decided to stop. The strange thing is that I didn’t have any issues the first time I used it. However, after the break and when I started again, I began experiencing severe insomnia. This is also when I started worrying that it might be related. Has anyone here had experience with GHK-Cu and sleep issues or insomnia, especially after restarting it? I’d really appreciate hearing your experiences. Thank you.