Nasal Delivery
Several research peptides — Selank, Semax, PT-141, kisspeptin, oxytocin — use intranasal administration as their primary route. Amber glass spray bottles with fine-mist atomizers are the format community sources consistently cite: amber glass blocks UV that degrades peptide solutions, and the fine-mist pump delivers a more consistent dose than dropper formats.
Common questions
Why amber glass instead of clear?+
Amber glass blocks UV in the wavelengths that degrade peptide solutions over time. Clear glass bottles allow that UV through, which shortens the practical shelf life of a reconstituted nasal peptide. Community sources and pharmaceutical packaging conventions both default to amber for this reason.
Which peptides use nasal administration?+
The nasal route is most commonly cited for Selank, Semax, PT-141, kisspeptin, and oxytocin. Each has its own reconstitution and dosing pattern — see the peptide-specific dosing guides on the site for the full protocol detail.
How many sprays per bottle?+
A 10 mL bottle with a fine-mist pump typically delivers ~100 sprays at 100 µL per spray. Some community-cited protocols use 50 µL sprays for finer dose control, doubling the spray count per bottle.