# Selank Reconstitution Guide: 10 mg Vial, BAC Water, and Dose Math (incl. "Sealink" Misspelling)
> Note: PeptIQ is for educational purposes only and is not medical advice. Selank is commonly discussed in research and nootropic communities; it is not a substitute for professional mental health or medical care. Consult a qualified healthcare professional before using any peptide.
If you search peptide forums for anxiety-adjacent nootropics, Selank appears constantly — often right next to its cousin Semax. You will also see "Sealink", a frequent misspelling that sends people to the wrong product pages and dosing threads. This guide focuses on what people actually mean when they ask how to reconstitute a 10 mg lyophilized Selank vial with bacteriostatic (BAC) water, how to run the concentration math, and how nasal vs injectable routes show up in community norms.
Nothing here is individualized medical advice. Think of this as a research-education framework for understanding labels, math, and tracking.
What Is Selank?
Selank is a synthetic heptapeptide analog derived from tuftsin, a naturally occurring immunomodulatory peptide. In published and preclinical literature, it is often discussed in contexts involving:
- Anxiolytic-like effects in animal models (without classic benzodiazepine sedation in many studies)
- Nootropic / cognitive research alongside related peptides like Semax
- Immune modulation framing in some Russian-origin research traditions
Human clinical data exist but are narrower than what social media summaries suggest. When communities discuss Selank, they are usually referencing research-grade lyophilized powder reconstituted for subcutaneous injection or compounded into nasal spray workflows — two different handling paths with different math and storage assumptions.
Primary research starting points:
"Sealink" vs Selank: Why the Typo Matters for SEO and Safety
Sealink is not a distinct compound. It is almost always a typo, autocorrect artifact, or vendor typo for Selank. The same pattern shows up with Semax ("Semax" vs "Semax nasal").
Why call this out explicitly?
- Wrong search results — mistyped queries surface unrelated products or outdated forum posts.
- Label confusion — some suppliers print inconsistent names; verify the actual sequence and certificate of analysis (COA), not just the listing title.
- Dose thread drift — Sealink threads often mix Semax and Selank advice; the peptides are related but not interchangeable in community dosing tables.
If you landed here searching Sealink reconstitution, you almost certainly mean Selank.
Before You Mix: What a 10 mg Vial Usually Means
A 10 mg lyophilized vial contains 10 milligrams of peptide as a dry cake or powder. Until you add diluent, there is no "mg per mL" — only total mass.
Community reconstitution norms for small nootropic peptides often use 1 mL or 2 mL bacteriostatic water because:
- Smaller volumes keep per-dose draw sizes practical for insulin syringes
- BAC preservative supports multi-dose access patterns common in tracking apps
- 10 mg / 2 mL is an easy mental math anchor (5 mg/mL)
Always confirm any supplier-specific instructions. If vendor guidance conflicts with generic forum advice, follow the stricter product-specific guidance.
Step-by-Step: Reconstituting 10 mg Selank With BAC Water
This is the educational workflow people commonly describe — not a prescription.
1) Gather supplies (research context)
- 10 mg lyophilized Selank vial
- Bacteriostatic water (0.9% benzyl alcohol is typical)
- Alcohol swabs, sterile syringe/needle for mixing
- Refrigeration plan for post-mix storage
2) Let the vial reach room temperature
Cold cake can slow dissolution. Most users briefly warm the sealed vial in the palm before adding water.
3) Add BAC water slowly down the glass wall
Inject diluent gently against the inside wall of the vial, not directly onto the powder cake. Swirl — do not shake aggressively. Selank is generally described as reasonably soluble, but incomplete dissolve still happens if water is added too fast or the vial is shaken.
4) Record your mix in one place
At minimum, log:
- Peptide amount (10 mg)
- Diluent volume (e.g., 2 mL BAC)
- Mix date
- Target concentration (calculated)
- Intended route (nasal prep vs injectable — these are not the same workflow)
PeptIQ users often tie this to a vial record so dose math does not drift mid-cycle.
Concentration Math: 1 mL vs 2 mL Examples
The formula everyone reuses:
Concentration (mg/mL) = total mg ÷ total mL of diluent
| Diluent added | Concentration | Volume for 250 mcg | Volume for 500 mcg | Volume for 1 mg |
|---|---|---|---|---|
| 1 mL BAC | 10 mg/mL | 0.025 mL (2.5 units on U-100) | 0.05 mL (5 units) | 0.1 mL (10 units) |
| 2 mL BAC | 5 mg/mL | 0.05 mL (5 units) | 0.1 mL (10 units) | 0.2 mL (20 units) |
Microgram reminder: 1 mg = 1,000 mcg. Community Selank discussions often reference 250–500 mcg per administration in research contexts, but published human ranges vary and product labels differ. Treat forum numbers as starting conversation points, not personal instructions.
Worked example (2 mL BAC)
- 10 mg ÷ 2 mL = 5 mg/mL
- Desired amount: 300 mcg (0.3 mg)
- Volume to draw: 0.3 ÷ 5 = 0.06 mL (6 units on a U-100 insulin syringe)
Use a reconstitution calculator when you change vial sizes mid-protocol — the #1 error is carrying over old unit assumptions.
Nasal vs Injectable: Same Peptide, Different Workflows
Selank appears in two community patterns:
Injectable (subcutaneous) reconstituted liquid
- Mixed with BAC at a defined mg/mL
- Dosed by syringe volume from the vial
- Storage and beyond-use timing follow liquid-peptide norms (refrigeration, light protection, documented open-vial date)
Intranasal spray (often separate prep)
Some users transfer reconstituted solution into nasal spray devices with different per-spray volume math. Spray concentration is not automatically identical to injectable concentration. Nasal workflows also introduce sterility and device-cleaning variables that injectable-only guides skip.
Educational takeaway: pick one route framework, document it, and do not assume Semax nasal instructions apply 1:1 to Selank.
Storage After Reconstitution
Community norms for BAC-reconstituted peptides commonly include:
- Refrigerate after mixing (typical range discussed: ~2–8 °C)
- Protect from light
- Track open date and follow the shortest reliable beyond-use window from your supplier or pharmacist
- Do not freeze most reconstituted peptide solutions unless product guidance explicitly allows it
Lyophilized unreconstituted powder is often stored refrigerated or frozen per label; once liquid, the clock changes.
Common Reconstitution Mistakes (Selank-Specific)
- Searching "Sealink" and copying Semax doses — related peptides, different potency discussions.
- Using 1 mL because "smaller is stronger" without updating syringe math — leads to 2× concentration vs a 2 mL mix.
- Shaking the vial — increases foaming and can denature sensitive peptides; swirl instead.
- No mix log — users forget whether they used 1 mL or 2 mL and mis-dose for weeks.
- Ignoring route — nasal device math layered on top of injectable concentration assumptions.
Selank vs Semax: Quick Comparison
| Topic | Selank | Semax |
|---|---|---|
| Primary community framing | Anxiolytic / calm focus | Stimulatory nootropic / focus |
| Typical vial sizes discussed | 5 mg, 10 mg | 5 mg, 10 mg, 30 mg |
| Reconstitution pattern | 1–2 mL BAC common | Similar |
| Misspellings seen | Sealink | Semax/Semax nasal |
| Research overlap | Tuftsin analog family | ACTH fragment analog |
Many users experiment with one or the other; stacking discussions exist but belong in clinician-guided contexts, not generic blog advice.
Frequently Asked Questions
Q: I bought "Sealink" — is that a different peptide?
A: Almost always no. Sealink is a common misspelling of Selank. Verify the actual peptide name on the COA and sequence documentation, not just the marketplace title.
Q: Should I use 1 mL or 2 mL of BAC for a 10 mg Selank vial?
A: Both are commonly discussed. 2 mL yields easier micro-dose syringe measurements for many users; 1 mL yields higher concentration and smaller volumes. Choose one, document it, and run all dose math from that concentration.
Q: Can Selank be taken nasally instead of injected?
A: Nasal use is discussed in some research and community contexts, often as a separate preparation workflow. Route choice affects concentration math, device volumes, and handling — not something to swap casually without redoing calculations and reviewing product guidance.
Q: How long is reconstituted Selank good for?
A: There is no universal answer. BAC-reconstituted multi-dose vials are commonly refrigerated with vendor-specific beyond-use windows. Follow the strictest applicable product or pharmacy guidance and track your open date.
Q: Is Selank the same dose as Semax?
A: No. Community dose tables differ between the two peptides even when vial sizes look identical. Treat each compound's math independently.
Q: What should I track besides dose volume?
A: Mix date, diluent volume, concentration, injection site or spray count, subjective response notes, sleep quality, and any side effects — patterns matter more than single-day impressions in research-style self-tracking.
Track Selank Mix Math With PeptIQ
Reconstitution errors usually happen when concentration lives in your head instead of your log. PeptIQ helps you record vial strength, BAC volume, calculated mg/mL, and per-dose draws — so when you rotate vials or switch from 1 mL to 2 mL, your protocol stays coherent.
Download PeptIQ — reconstitution calculators, vial tracking, and protocol notes in one place.
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This article is for educational purposes only and is not medical advice. Always work with a qualified healthcare professional before starting, stopping, or changing any peptide or protocol.
