Reconstitution for intranasal Semax/Selank — preservation concerns

Bac water is standard. The benzyl alcohol is there specifically to keep contamination down over weeks. Preservative-free saline is for single-use or very short turnaround.

Fridge storage regardless of diluent. Room-temp nasal sprays on a desk are a bad idea for anything peptide-based.

I reconstitute smaller batches (1mg of peptide at a time into ~3mL) so I burn through them in 2-3 weeks. Fewer preservation headaches than sitting on a full 5mg vial diluted.

First time reconstituting anything intranasal — this helped, thanks.

Bac water works but I'm not convinced the benzyl alcohol concentration is high enough to actually matter for nasal spray that's getting used daily. You're introducing new bacteria every time you spray it anyway. The fridge thing is real though, room temp peptides degrade faster. Honestly the small batch approach makes the most sense if you can be bothered with it, just skip the preservation paranoia.