DIY nasal selank and semax: what the peptide TikTok crowd gets wrong

What did @arameo04 actually say?

The creator walked viewers through a DIY selank nasal spray recipe. They listed the ingredients as "5NG select" (almost certainly 5mg selank peptide), alcohol pads, a commercial nasal spray bottle (specifically an "American breath" brand), and 3mL of saline water. The audio is garbled in places, but the core message is clear: this is a how-to guide for reconstituting a research peptide into an intranasal format at home. No medical supervision, no sterility protocol, no dosing rationale given.

To their credit, they did reference saline as a diluent, which is a more appropriate choice than plain water. But the video stops there. No mention of peptide stability, storage temperature, or what "5NG" actually means in practical terms, and no acknowledgment that handling raw peptides outside a licensed pharmacy carries real risks.

Does the science back this up?

Selank has a legitimate research base, mostly out of Russia. The evidence is real but narrow. It does not support DIY compounding at home.

Selank (Thr-Lys-Pro-Arg-Pro-Gly-Pro) is a synthetic analogue of tuftsin, a naturally occurring immunomodulatory peptide. Russian researchers including Semenova et al. (2010, CNS Drug Reviews) and Zozulya et al. (2001, CNS Drug Reviews) published work showing anxiolytic effects in animal models and some small human trials, primarily conducted at the Institute of Molecular Genetics in Moscow. The intranasal route has been used in Russian clinical research, which is where the "nasal selank" concept originates.

The problem is that these studies used pharmaceutical-grade preparations manufactured under controlled conditions, not peptide powder reconstituted in a kitchen. Bioavailability through nasal mucosa is highly sensitive to particle size, pH, and formulation consistency, none of which a home user can control. There is no peer-reviewed human trial using homemade intranasal selank that establishes safety or efficacy.

What did they get wrong (or right)?

Using saline as a diluent is a reasonable choice. Bacteriostatic saline or sterile saline is standard for peptide reconstitution, and the creator does mention saline water specifically. That part is not wrong in principle.

Everything else is a problem. The transcript references "5NG select" which likely means 5mg, but the creator never explains concentration math. If you dissolve 5mg of selank into 3mL of saline, you get approximately 1.67mg per mL. Without knowing how many sprays a nasal bottle delivers per actuation (typically 0.1mL per spray), a user has no idea what they are actually administering. That is not a minor oversight.

The alcohol pad use is also ambiguous. Alcohol is appropriate for swabbing vial tops, but using it near an open peptide solution or near nasal mucosa is counterproductive. The video does not clarify the intended use.

Most significantly, the creator shows no sterile technique. Reconstituting peptides outside a cleanroom environment introduces contamination risk. Intranasal administration bypasses some of the body's filtration defenses. A contaminated nasal spray can cause serious local or systemic infection.

What should you actually know?

Selank is not FDA-approved. In the United States, it exists in a gray zone: it is not a controlled substance, but it is also not legal to sell for human consumption. Most selank sold domestically is labeled "for research use only." That label is not a loophole that makes home compounding safe or legal.

If you are interested in selank or similar peptides through a regulated channel, licensed compounding pharmacies operating under 503A or 503B frameworks can prepare peptide formulations with verified purity, sterility testing, and appropriate concentration labeling. That is a categorically different product from powder in a vial you bought from a research chemical supplier.

Intranasal peptide delivery is a legitimate pharmacological approach. Drugs like desmopressin and oxytocin are delivered intranasally under pharmaceutical standards. The delivery route is not the issue. The issue is uncontrolled compounding with no quality assurance, no clinical oversight, and no informed understanding of what is actually in the product.

Anyone considering peptide therapy should consult a licensed clinician. Full stop.