04/23/2026
Peptides research: Nasal Sprays vs Injections
My disclaimer: please know these products are for research purposes only. In research there are comments and opinions by many, but published studies are few. So the following are some comments from researchers regarding the peptides, so take them with a grain of salt until you can verify with research of your own or a published study provides findings.
1- Oxytocin: Nasal Spray is Superior (For Brain/Behavior). If the research goal involves the brain, social behavior, anxiety, or cognitive function, the nasal spray is far more effective than an injection.
2- BPC-157: A Tie between spray and injection (It Depends on the Goal). Injectable wins for targeted tissue/joint injuries. Nasal spray is highly effective for brain/CNS targeting or general systemic use.
3- TB-500 (Thymosin Beta-4): Injectable is Vastly Superior. If you are looking at the BPC-157 / TB-500 blend, the TB-500 portion does not do well as a nasal spray. TB-500 is a much larger peptide molecule than BPC-157. The nasal mucosa acts as a strict filter; small molecules pass through easily, but large molecules like TB-500 have notoriously poor nasal bioavailability (often less than 10% absorption).
About Nasal Sprays: The industry standard is about 0.1 ml per spray, so a 15ml Nasal Spray Vial = 150 total sprays. The BCP-157 Nasal bottle holds 30mg of peptide in 15ml, so each spray provides approximately 200 mcg (0.2 mg) with an estimated 150 total sprays.
Also: We have now added GLP3-R (Retatrutide) to our peptide selection for research today:
https://www.revgenetics.com/collections/research