Those freeze-dried peptides should hold up okay. Someone talked about them lasting for years even without cooling. I don't think one thaw cycle would change anything. My own experience with ones kept in the freezer shows they stayed just as strong.
Several kits are on the way that I'd like to put in the freezer. These include Reta, Tirzep, NAD, and BC10. My house has three separate freezers, each with automatic defrost cycles. I've heard that this feature might harm the peptides. I'm wondering if anyone has used or knows about a compact freezer suitable for storing peptides over extended periods.