Semax and Selank are two brain peptides developed in Russia: Semax for focus, memory and mental energy, and Selank for calm and stress resilience without sedation. At mobivIVe, doctor-reviewed Semax and Selank are supplied as prefilled pens from R1,450 each, delivered nationwide across South Africa. Below is what they do, who they suit, what they cost, and how to get started with our doctor-led team. New to these peptides? Read our full guide on what Semax and Selank are and how they work.
What they do. Semax is derived from a fragment of the hormone ACTH and raises BDNF, the brain’s own growth and repair factor, without any hormone or cortisone effect. Selank is derived from tuftsin, a natural immune peptide, and supports the brain’s GABA calming system without sedation or dependency. Both were developed in Russia, where Semax is listed as an essential medicine for stroke and cognitive disorders. Most of the research is Russian and English-language trials are limited, so we present the evidence honestly as early.
Who they suit. Semax appeals to people wanting sharper focus, memory and mental energy, or support with fatigue and brain fog. Selank appeals to people with everyday anxiety and stress who want to stay clear-headed. Many use both together, focus plus calm, under doctor guidance.
How to start, in 3 simple steps
Message us on WhatsApp. Tell our doctor-led team your goal.
Medical questionnaire. Complete a short questionnaire, reviewed by our registered doctor. A consultation is arranged when your screening calls for one. If it is safe and suitable, a script is issued.
Delivered to your door. Your prefilled pen is couriered anywhere in South Africa, with clear dosing instructions.
Are Semax and Selank right for me? They suit adults who want cognitive or stress support as part of a medically-guided plan. Our doctor asks about your conditions and current medicines, especially any anxiety, mood or sleep medicines, before anything is dispensed. Tell us if you are pregnant or breastfeeding. Competitive athletes: neither is approved as a medicine outside Russia, which can bring them under WADA’s catch-all rule for unapproved substances, so check with your federation first.
Approx. doses: 20 doses at 250mcg (a 4-week course)
What it is
Semax is a 7-amino-acid peptide derived from a fragment of ACTH (4-10), modified for stability and a longer effect. It has no hormone or cortisone activity. It is used for focus, memory and mental energy, and for fatigue, stress and low mood. It increases BDNF, the brain’s own growth and repair factor, and supports healthy blood flow to the brain. Each prefilled pen holds 5mg: 20 morning doses, a 4-week course.
Used for
Focus, memory and concentration
Mental energy and fatigue
Stress and mild low mood
Brain recovery support (under medical care)
Clients who want cognitive support without stimulants
Approx. doses: 20 doses at 250mcg (a 4-week course)
What it is
Selank is a 7-amino-acid peptide derived from tuftsin, a natural immune peptide. Its main effect is calming anxiety and stress without sedation, and it also supports attention, memory and mild low mood. It works on the GABA system (the brain’s calming system), slows the breakdown of the body’s own enkephalins and increases BDNF. It shows no evidence of dependency or withdrawal. Each prefilled pen holds 5mg: 20 morning doses, a 4-week course.
Semax is a 7-amino-acid peptide derived from a fragment of ACTH (4-10), modified to be stable and longer acting. It has no hormone or cortisone activity. It raises BDNF, the brain’s own growth and repair factor, and is used for focus, memory and mental energy.
Selank is a 7-amino-acid peptide derived from tuftsin, a natural immune peptide. Its main effect is calming anxiety and stress without sedation, working on the brain’s GABA system, and it shows no evidence of dependency or withdrawal.
Semax is the focus and energy peptide, Selank the calm and stress peptide. They are often combined for focus plus calm, and many people take both in the morning. Our doctor confirms whether the combination suits you.
Each is injected under the skin every morning, 5 days on and 2 days off, at 250mcg (15 clicks on the pen). One 5mg pen holds 20 doses, a 4-week course. Some people instead use 4 weeks on and 4 weeks off.
At mobivIVe, doctor-reviewed Semax and Selank are R1,450 each per prefilled pen, a 4-week course, delivered nationwide. Yes, they are dispensed on a valid medical script after a questionnaire reviewed by our registered doctor, with a consultation arranged when your screening calls for one.
Medically reviewed by Dr Chris van Zyl This page was written and reviewed by mobivIVe’s medical team, led by Dr Chris van Zyl, an HPCSA-registered medical doctor (registered as M.C. van Zyl, HPCSA reg. no. MP0287067) who is licensed to both prescribe and dispense medicines under a Section 22C dispensing licence. Last reviewed October 2026. Not intended to diagnose, treat, cure or prevent any disease; individual results vary. Consult your healthcare provider.
