Dosing Guide — 2026-11-11
Selank is a nootropic/anxiolytic peptide studied for calm focus and anxiety reduction — the gentler counterpart to Semax. It can be dosed by subcutaneous injection or nasal spray. This guide covers both routes, daily dosing, and cycling. The numbers match our Selank 10mg and Selank spray protocol pages.
Researcher special: code SAVE25 or PLATINUM25 unlocks 25% off the Selank 10mg vial, the Selank nasal spray, and bacteriostatic water. Every vial ships with a batch-matched COA at 99%+ HPLC purity.
Standard reconstitution: add exactly 2 mL bacteriostatic water.
| Metric | Value |
| Peptide | 10 mg |
| Bac water | 2 mL |
| Concentration | 5 mg/mL |
| Per 10 units | 500 mcg |
Dose: 500 mcg daily (10 units). The reconstituted solution can also be loaded into a nasal spray bottle at the same concentration.
The spray is pre-mixed — each spray delivers ~50 mcg.
| Level | Dose | Sprays |
| Conservative | 100 mcg | 1 spray per nostril, once daily |
| Best results | 200 mcg | 2 sprays per nostril AM (and again in the afternoon if desired) |
Prime the pump before first use, then refrigerate.
| Parameter | Value |
| Cycle length | 1–3 months common |
| Time off | 2–4 weeks |
| 5-on / 2-off | Commonly used to preserve the subjective effect |
Selank is the calmer, anxiolytic peptide; Semax is the more activating, focus-oriented one. They're often discussed together and sometimes alternated. See the Selank research overview and can peptides help with brain fog. Refrigerate the reconstituted vial and use within 4 weeks; keep the spray refrigerated and use within the timeframe on the bottle.
Disclaimer: All information presented in this article is for educational and informational purposes only. Platinum Biolabs does not promote or endorse the use of peptides for human consumption. All products sold by Platinum Biolabs are intended strictly for laboratory and research use only. Consult a qualified healthcare professional before making any health-related decisions.