The Semax / Selank Separate-Vial Pair supplies both peptides at 10 mg each in individual vials rather than as a premixed blend. Separate vials allow either compound to be prepared alone as a control arm, or combined at a chosen ratio. A premixed blend supplies only the fixed combination. Supplied lyophilized. For research use only.
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The Semax / Selank Separate-Vial Pair contains Semax at 10 mg and Selank at 10 mg in individual lyophilized vials. The same two compounds at the same masses are also available premixed in a single vial. The difference between the two products is format, and it has consequences for study design.
Separate vials yield three possible preparations from one purchase: Semax alone, Selank alone, or both combined at a ratio of the researcher’s choosing. The two single-compound preparations are the control arms that make a combined result interpretable. A premixed blend yields one preparation, at a fixed ratio, with no way to isolate either compound.
The operation runs in one direction. Two separate vials can be combined to match a blend. A blend cannot be separated back into its components.
The premixed format has its own advantages. It requires one reconstitution rather than two and holds the ratio constant across every preparation without measurement. For work that only uses the combination, it is the more practical choice.
Both vials are supplied with batch documentation.
For Research Use Only. Not intended for human consumption, therapeutic use, veterinary use, or diagnostic applications.
The Semax / Selank Separate-Vial Pair supplies Semax 10 mg and Selank 10 mg in individual vials rather than premixed. Separate vials allow three preparations from one purchase — either compound alone, or both combined at a chosen ratio. A premixed blend of the same two compounds supplies only the fixed combination and cannot be separated.
| Compound | Mass | Format | Peptide class |
|---|---|---|---|
| Semax | 10 mg | Individual lyophilized vial | Heptapeptide, ACTH(4-10) analogue |
| Selank | 10 mg | Individual lyophilized vial | Heptapeptide, tuftsin analogue |
Both vials are supplied with batch documentation. The same two compounds at the same masses are also available as a premixed blend in a single vial.
Both formats supply Semax and Selank at 10 mg each. The difference is whether they arrive together or apart, and that determines what a researcher can do with them.
Separate vials yield three possible preparations from a single purchase:
The first two are the control arms. Without them, an observation made using both compounds cannot be attributed to either one — no arm exists that separates their contributions.
Separate vials also allow the ratio to be varied. A premixed blend fixes it. Studies examining whether a relationship between the compounds depends on proportion require the ability to change proportion, which a fixed preparation does not provide.
The premixed format has real advantages, and they are not trivial.
It requires one reconstitution rather than two, which halves the preparation steps and the associated opportunities for volumetric error. It holds the ratio constant across every preparation without measurement, so consistency does not depend on pipetting accuracy. And it occupies one vial rather than two in storage.
For work that only ever uses the two compounds together at a fixed 1:1 ratio, the premixed blend is the more practical product. This page recommends it for that case.
| Requirement | Separate vials | Premixed blend |
|---|---|---|
| Prepare either compound alone | Yes | No |
| Single-compound control arms | Yes | No |
| Vary the ratio between compounds | Yes | No |
| Match a fixed 1:1 preparation | Yes | Yes |
| Reconstitution steps | Two | One |
| Ratio consistency without measurement | Requires pipetting accuracy | Guaranteed by formulation |
| Storage footprint | Two vials | One vial |
| Can be converted to the other format | Yes — combine | No |
Neither format is better in general. Separate vials suit work requiring control arms or ratio flexibility. The blend suits work that only uses the combination.
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