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Peptide Strips vs Nasal Sprays: How Researchers Choose a Format

By Dan Reset · October 23, 2026
⚠ Educational content only

This article is written for qualified researchers. It does not constitute medical advice, and nothing here is guidance for human or veterinary use of any compound.

Two formats, two different jobs

Most of the peptides in our catalog come in two presentations: a thin oral strip that dissolves on the tongue, or a metered nasal spray. Researchers ask us which one they should order, and the honest answer is that they are not interchangeable versions of the same thing. They suit different study designs, different handling routines, and different compounds. This guide walks through the practical differences so you can match the format to the work.

How each format is built

A peptide strip is a small film, about the size of a postage stamp, with a measured amount of compound distributed through the film matrix. It is placed on or under the tongue and dissolves there. Because the dose is fixed at manufacture, every strip in a box carries the same nominal content — 0.5 mg, 2 mg, 100 mg, depending on the product.

A nasal spray delivers the compound in solution through a metered pump. Each actuation dispenses a consistent volume, and the total content of the bottle is spread across a known number of sprays. The nasal route is chosen in research designs that want to study intranasal delivery itself, including the nose-to-brain transport pathway that makes compounds like Semax and Selank so heavily studied in that format.

Where each format wins

Precision and repeatability. Strips take the measurement step out of the lab entirely. There is no reconstitution, no drawing up, no calculation. For longitudinal work where the same dose is administered many times, that consistency is the whole point.

Storage and transport. Strips are dry, light, and stable in a sealed pouch at room conditions, which makes them easy to store in quantity and simple to ship. Sprays are liquids in glass or plastic bottles; they travel well but take more shelf space, and most labs refrigerate opened bottles.

Study design. If the research question involves intranasal administration — absorption across the nasal mucosa, olfactory-route delivery, comparison against other routes — the spray is the format the literature is built on. If the question is about the compound itself rather than the route, strips remove a variable.

Compound availability. Some compounds are only practical in one format. The GLP research compounds — Semaglutide, Tirzepatide, Retatrutide — are stocked as strips. The classic neuropeptides are stocked as sprays. Where a compound exists in both, like NAD+, the choice is genuinely about the study.

A simple way to decide

Ask what the variable is. If the delivery route is part of what you are studying, choose the format the published work used, so your results sit inside the existing literature. If the route is incidental, choose the format with the fewest handling steps — for most labs, that is the strip. Either way, both formats in our catalog are produced to the same standard: lab-grade material, labeled by compound and content, sold strictly for research use.

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