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Someone online asked whether they can mix peptide powders into nasal spray bottles at home and whether they need to sterilize the bottles or worry about bacteria growing in the liquid. In short: people are talking about making their own nasal peptide sprays, but doing that safely is not as simple as dissolving stuff in water and squirting it into your nose. Semax is one of the peptides mentioned. It’s a small chain of amino acids (a peptide) developed in Russia and often used experimentally as a nasal spray. People use it because it’s thought to affect brain signaling when given through the nose. “Selenk” isn’t a widely recognized drug name I can confirm — it might be a misspelling, a brand, or a lesser-known peptide. “Bac water” (bacteriostatic water) and plain saline are common lab/medical liquids used to dissolve peptides. Bacteriostatic water contains a tiny preservative that slows bacterial growth; plain saline does not. The core research on Semax comes mostly from limited clinical studies and preclinical work, often in Russia and a few academic labs. Some studies suggest it may have effects on cognitive function or recovery after brain injury, but evidence is not large or definitive, and dosing/formulation matters. Nobody in the snippet is describing a controlled clinical trial — this is a person trying to make their own preparations at home. That’s a different situation than a tested, sterile product used in a research or medical setting. Home-mixed solutions can vary wildly in concentration, purity, and sterility, so any benefits seen in formal studies may not apply to homemade sprays. Why this matters: the nose is a sensitive route to deliver drugs to the brain, and it's attractive because it avoids injections. That’s why people want nasal sprays. But because the nasal cavity and sinuses are vulnerable to infection and irritation, using non-sterile solutions or reusing unsterilized bottles can cause harm — from bad infections to local irritation. For someone curious about experimenting, the practical takeaway is to be cautious: products made in controlled, sterile conditions by professionals are not the same as DIY mixes in kitchen syringes and repurposed bottles. Important caveats: do not assume it’s safe to mix and store peptides at home. Sterility, correct concentration, storage temperature, and preservative compatibility all matter. Using plain saline without preservatives increases the risk that bacteria or fungi can grow over time, especially if the bottle is repeatedly exposed to air. Some people can have allergic or inflammatory reactions to preservatives too, so professional guidance matters. Also, many peptides are not approved medicines in many countries; legal and safety oversight varies. If someone is considering any peptide treatment, they should consult a qualified healthcare professional and get products from reputable, regulated sources rather than making DIY nasal sprays. Bottom line: dissolving peptides into nasal bottles at home carries real risks from contamination and dosing errors; it’s safer to rely on professionally made, sterile products and medical advice rather than DIY mixes.
Source: r/Peptides