Published work on intranasal peptide delivery (for insulin analogs, calcitonin, and oxytocin) demonstrates that bioavailability for this size class without enhancers is typically in the low single-digit percent range, though these data are from different peptides with different charge profiles
After reconstitution the material is a solution rather than a powder, and solutions are far less stable reconstituted vials are refrigerated at 28C, kept away from light, and never frozen, since freeze-thaw cycling can precipitate peptides out of solution
Reconstitution: Add 5.0 mL bacteriostatic water ~20 mg/mL concentration
If peptides are on your radar, use this moment to ask better questions instead of acting faster
Fontana, Patricia I
Case Study 2: Skin Whitening Subject : Alex, 30 years old Background : Alex wanted to achieve a lighter skin tone and reduce dark spots