Nootropic + neurorestorative stack

Cognitive Sharpness

3 phases3 peptidesRelated goal hub →Related life-stage hub →

Cognitive complaints are tricky because they are usually downstream of something more fundamental. Sleep debt, thyroid dysfunction, B12 or iron deficiency, depression, sleep apnea, vascular health, undiagnosed inflammatory burden — any of these will present as "brain fog" or declining sharpness, and none of them are fixed by peptides. Before starting this protocol, work through a proper differential with your clinician.

If you have completed that workup and your labs are clean but persistent cognitive dullness remains, this is the peptide-specific path most community users work through. Phase 1 establishes a semax baseline; Phase 2 adds selank to address the anxiety-cognition coupling that often confounds "brain fog" presentations; Phase 3 (optional, advanced) considers a cerebrolysin pulse course for deeper neurorestorative work.

If you are concerned about progressive memory decline (not just everyday sharpness), see your doctor for a neurology workup — that is a different conversation than this protocol can support.

Phases

Phase 1 — Foundation (semax intranasal)
weeks 1-4
Semax intranasal at 1mg/day. Mechanism: ACTH(4-10) analog with neurotrophic and BDNF-modulating effects. Russian clinical research dominates; Western replication is essentially absent. Starting solo for 4 weeks lets you read tolerability and effect before layering selank.
- Semax1 mg · daily · morning
  1mg/day intranasal in the morning. Morning timing matches the activating effect; evening dosing produces sleep disruption.
What “working” looks like
Sharper working memory by week 2-3. Faster recall during conversation. Sustained focus during cognitive tasks longer than your pre-Phase-1 baseline. Subjectively: 'on' rather than 'foggy' during morning hours.
Decision criteria
If working by week 4: advance to Phase 2 to address the anxiety-cognition coupling that often confounds cognitive complaints. If not working by week 4: reassess. Verify your lab workup is current; consider sleep audit. Do not escalate dose past 1mg/day — the dose-response curve is shallow above that.
Labs to pull
- B12 + MMA — undertreated deficiency is a common cognitive-symptom confounder
- Thyroid: TSH + free T3 + free T4
- Iron panel: ferritin + iron saturation
- Vitamin D (25-OH)
- hs-CRP — chronic inflammation is a quiet cognitive drain
Phase 2 — Add anxiolytic-nootropic layer (selank)
weeks 4-12
Add selank intranasal at 750mcg/day. Mechanism: tuftsin analog with anxiolytic + nootropic effects. Pairs mechanistically with semax — semax handles the neurotrophic side, selank handles the anxiety component. Many "brain fog" presentations are anxiety-mediated cognitive load rather than cognitive dysfunction per se. Selank addresses that specifically.
- Semax1 mg · daily · morning
  Continue Phase 1 dose. Both peptides nasal in the morning — administer 5-10 minutes apart in alternating nostrils to keep delivery clean.
- Selank750 mcg · daily · morning
  750mcg/day intranasal alongside semax. Anxiolytic effect is most pronounced in the first 2-3 weeks; cognitive sharpness benefits emerge by week 6.
What “working” looks like
Reduced anxiety-driven cognitive interference (less mental noise during focused tasks). Easier task-switching without losing context. Better mood baseline. Sleep quality often improves as a secondary effect.
Decision criteria
If working at week 12: stay on the Phase 2 combination indefinitely with periodic reassessment (every 4 months — symptom review + adjustment if sharpness plateaus). If considering progression to Phase 3 (cerebrolysin pulse): only after at least 8 weeks of stable Phase 2 benefit. If not working at week 12: discontinue both peptides for 4 weeks to wash out, then re-evaluate with your clinician — persistent unresponsiveness usually means the bottleneck isn't peptide-targetable.
Phase 3 — Optional neurorestorative pulse (cerebrolysin)
weeks 12+, by course
OPTIONAL and ADVANCED. Cerebrolysin is a porcine-derived neuropeptide mixture approved abroad (Europe, Asia, Russia) for ischemic stroke, dementia, and traumatic brain injury — NOT US-approved. Off-label use for healthy-adult nootropic enhancement is Tier 3. Typical course: 5mL IM daily for 10-20 days, repeated 1-2× per year. This is a meaningfully more intensive intervention than Phases 1+2 — requires IM injection, more careful sourcing, and explicit clinician involvement. Only consider if Phase 2 has been stable for 8+ weeks and you want to test a deeper neurorestorative layer.
- Semax1 mg · daily · morning
  Continue Phase 2 daily semax through and after the cerebrolysin course. The Phase 1+2 layer is the maintenance base.
- Selank750 mcg · daily · morning
  Continue Phase 2 selank through and after the cerebrolysin course.
- Cerebrolysin5 mg · daily · morning
  Course dosing: 5mL (≈5mg active) IM daily for 10-20 days, then off. Repeat 1-2× per year, not continuous. Most users start with 10-day courses to read tolerability.
What “working” looks like
Notable mental clarity emerging by mid-course (day 5-8). Improved verbal fluency. Possible mood lift. Effects often persist for 2-3 months after the course ends.
Decision criteria
After first 10-day course: pause, observe persistence over the next 4-8 weeks. If meaningful sustained benefit: run a second 10-day course 4-6 months later. If no meaningful benefit at end of first course: discontinue Phase 3 entirely — IM injection and porcine sourcing aren't worth it without a clear signal. Phase 1+2 remains the maintenance.

Cautions

Differential diagnosis is upstream. Cognitive complaints in healthy adults are usually downstream of sleep, thyroid, B12, iron, depression, sleep apnea, or vascular health. Work through that with your clinician BEFORE starting Phase 1 — peptides do not fix any of those underlying causes and using them to mask symptoms delays the actual diagnosis you need.
If you have progressive memory decline (not just everyday sharpness), this protocol is not the right tool. See a neurologist for a proper dementia workup — early diagnosis matters and is time-sensitive. The Slice 1 substrate guidance for the cognitive-decline life-stage applies here.
SSRI / MAOI / dopaminergic medication interactions: semax and selank both modulate neurotransmitter systems that overlap with these classes. Discuss with your prescribing clinician before adding either, especially if you are on dopaminergic agents (Parkinson's medications, ADHD stimulants, dopamine agonists) — additive effects are possible.
Cerebrolysin is porcine-derived. If you have pork allergy or follow a religious/dietary practice that prohibits porcine products, Phase 3 is contraindicated. Confirm allergy status before any first injection — anaphylaxis to porcine peptides is rare but real.
Cerebrolysin is not US-approved. Sourcing requires international pharmacy or research-chemical channels with quality risk. Storage requires refrigeration. Do not consider Phase 3 if you cannot verify your source and storage chain — adulterated or degraded cerebrolysin has uncharacterized effects.
Pediatric exclusion. This protocol is for adults 18+. Cognitive performance peptides in developing brains have uncharacterized long-term effects on the still-maturing prefrontal cortex.

Discuss with your clinician

Before Phase 1: confirm baseline lab workup is current and clean — B12, MMA, TSH, free T3, ferritin, vitamin D, hs-CRP. Your PCP can order these. If anything is out of range, address it first.
If you have progressive memory decline (not everyday sharpness), ask for a neurology referral and a formal cognitive assessment (MoCA or similar). This protocol is not the right tool for that situation.
If you are on SSRIs, MAOIs, dopaminergic medications, or ADHD stimulants, ask the prescribing clinician about interactions with semax + selank before starting.
Before Phase 3: confirm you have no pork allergy, confirm a sourcing path that includes proper refrigerated cold-chain delivery, and have a clinician oversee at least the first IM injection.
Every 4 months: review symptom trajectory, repeat hs-CRP, and discuss whether to continue, taper, or rotate the peptides. Long-term continuous use of these peptides has not been studied in healthy adults.

Evidence summary

Tier 3 protocol overall. Semax (Phase 1) is Tier 3 — Russian clinical research dominates; Western trials for nootropic indications are essentially absent. Selank (Phase 2) is Tier 3 — similar evidence base, anxiolytic claims are better supported than nootropic ones. Cerebrolysin (Phase 3) is Tier 2 for approved stroke/dementia/TBI indications abroad but Tier 3 for off-label nootropic use in healthy adults (FDA-approval rules don't propagate across indications). The mechanistic story is coherent across phases; human-outcome evidence in healthy-adult nootropic populations is thin to absent.

Components (3)

SemaxSynthetic ACTH(4-10) analog (heptapeptide)
SelankSynthetic tuftsin analog (heptapeptide)
CerebrolysinPorcine-derived neuropeptide mixture

Often combined with

Energy & Vitality
Cognitive sharpness is often downstream of mitochondrial energy supply. If you are working through the Energy protocol and Phase 2 (mitochondrial layer) is partially working but cognitive sharpness lags, layering this protocol's Phase 1+2 on top is the natural next move. Both stack cleanly — different peptide classes, no interaction conflicts.
Sleep Optimization
Many 'brain fog' presentations are actually sleep-quality presentations in disguise. If you have not validated sleep quality (tracker data, no apnea symptoms) and are jumping straight to a cognitive protocol, fix sleep first — it is the more common upstream cause and the Sleep protocol is the right path for that.

Ready to add this protocol to your stack?

Phase 1 entries start today; later phases are future-dated and ready to edit.