COGNITIVE · PEPTIDE BLEND
What is Semax + Selank?
Medically reviewed by the G1 Peptides clinical team · Updated October 1, 2026
THE SHORT ANSWER
A Semax and Selank blend combines two Russian-developed peptides studied for brain function. Semax is studied for focus and cognition, and Selank for anxiety and stress, so the pairing is used for focus without overstimulation.
Semax + Selank at a glance
- Type
- Peptide blend
- Also known as
- Semax/Selank stack
- Mechanism
- Semax (BDNF, activating) + Selank (anxiolytic)
- Status
- Compounded (Rx)
- Half-life
- Minutes
- Route
- Subcutaneous
- Dosing range in the literature
- 400–1,000 mcg total per dose
- Onset
- Within hours
- Storage
- Refrigerated (2–8 °C); use within the pharmacy beyond-use date
How Semax + Selank works
Semax raises brain growth factors and is mildly activating. Selank modulates the calming GABA system. The effects are considered complementary.
What Semax + Selank is studied for
- Focus
- Calm under stress
- Cognitive performance
Each peptide has Russian clinical studies of its own. The combination has not been tested in controlled trials.
Being studied for something is not proof that it works. Results in individuals vary.
Semax + Selank dosing
Published protocols describe 400–1,000 mcg total per dose, once daily, morning, given subcutaneous. Onset is typically reported at within hours.
These figures are context from the literature, not instructions. A licensed provider sets the dose and schedule for each patient.
Semax + Selank side effects and risks
- Mild stimulation or sedation
- Injection-site reactions
Tell your provider about every medication and condition before starting, and report anything unexpected. See peptide side effects and safety and who should not use peptides.
Is Semax + Selank FDA approved?
A compounded preparation. Neither component is FDA-approved.
Approval and trial status change. This page was last reviewed on October 1, 2026.
Semax + Selank at G1 Peptides
G1 Peptides supplies Semax + Selank as vials (Blend vials) and in pens (Zen X). Prescription products ship only after a licensed provider has reviewed the order.
Semax + Selank questions
- What is Semax + Selank?
- A Semax and Selank blend combines two Russian-developed peptides studied for brain function. Semax is studied for focus and cognition, and Selank for anxiety and stress, so the pairing is used for focus without overstimulation.
- What is Semax + Selank used for?
- Semax + Selank is studied for focus, calm under stress, and cognitive performance. Each peptide has Russian clinical studies of its own. The combination has not been tested in controlled trials.
- How does Semax + Selank work?
- Semax raises brain growth factors and is mildly activating. Selank modulates the calming GABA system. The effects are considered complementary.
- Is Semax + Selank FDA approved?
- A compounded preparation. Neither component is FDA-approved.
- What is the typical Semax + Selank dosage?
- Published protocols describe 400–1,000 mcg total per dose, given subcutaneous. This is context from the literature, not a recommendation: a licensed provider sets the dose.
- What are the side effects of Semax + Selank?
- Risks noted for Semax + Selank include mild stimulation or sedation and injection-site reactions. Tell your provider about your medications and conditions before starting.
- How long do the peptides in Semax + Selank last in the body?
- The reported half-life is minutes. Onset is typically reported at within hours.
- How should Semax + Selank be stored?
- Refrigerated (2–8 °C); use within the pharmacy beyond-use date.
For educational purposes only, and not medical advice. These statements have not been evaluated by the FDA. Nothing on this page is intended to diagnose, treat, cure, or prevent any disease. Use any compound only under the guidance of a licensed provider.