The Semax and Selank Nasal Spray Comparator supplies both neuropeptides in nasal format, each bottle containing 10 mg across approximately 90 actuations. The labelled mass describes the bottle, not the individual spray. Both peptides fall under 1,000 daltons, the molecular weight range in which nasal absorption is most favourable. Supplied as prepared solutions. For research use only.
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The Semax and Selank Nasal Spray Comparator brings together two neuropeptides in nasal format for format-level comparison. Each bottle contains 10 mg of peptide across approximately 90 actuations.
The labelled figure describes the bottle rather than a single spray. A 10 mg bottle delivering 90 actuations contains roughly 111 micrograms per actuation nominally — a figure frequently misread, since the labelled mass is what appears on the front of the product.
Nominal content is also not the same as delivered content, and neither is the same as absorbed content. Priming and residual volume consume material, absorption depends on molecular weight, and the fraction reaching the central nervous system directly is a separate quantity again.
Molecular weight matters here, and it favours these two compounds. Nasal absorption of peptides falls sharply with increasing size, and both Semax at approximately 813 daltons and Selank at approximately 751 daltons sit within the range where nasal absorption is most favourable.
One distinction is worth noting for neuropeptides in particular. Published nasal bioavailability figures generally describe systemic absorption into the bloodstream. The fraction reaching the central nervous system directly, through olfactory and trigeminal routes, is a separate and considerably smaller number.
For Research Use Only. Not intended for human consumption, therapeutic use, veterinary use, or diagnostic applications.
The Semax and Selank Nasal Spray Comparator contains both peptides in nasal format, each bottle holding 10 mg across approximately 90 actuations. The labelled mass is the bottle total, not the per-spray content. Both peptides fall below 1,000 daltons, the molecular weight range where nasal absorption of peptides is most favourable.
| Product | Peptide content | Actuations | Approximate molecular weight |
|---|---|---|---|
| Semax nasal spray | 10 mg per bottle | ~90 | ~813 Da |
| Selank nasal spray | 10 mg per bottle | ~90 | ~751 Da |
Both are supplied as prepared solutions in nasal spray bottles with batch documentation. Confirm actuation count and molecular weight against the documentation supplied with your lot.
A bottle labelled 10 mg contains 10 mg in total, not 10 mg per actuation.
Divided across approximately 90 actuations, that gives roughly 111 micrograms per actuation nominally. The difference between those two figures is a factor of ninety, and the labelled figure is the one printed on the product — which is why it is frequently misread.
The same convention applies across nasal peptide products generally, and the same misreading recurs with them.
Nominal per-actuation content is not the end of the chain. Five distinct quantities sit between the label and what a study measures:
Each step is smaller than the one before it, and the gap between the first and the last spans several orders of magnitude. Product specifications describe step one. Study designs generally care about step four or five.
Stating the chain matters because a specification figure is often treated as though it described exposure. It does not.
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