What is the difference between semax and selank?

Semax is generally described as focusing and stimulating; selank as calming and anti-anxiety. They come from different parent molecules.

Can semax affect sleep?

Some users say so: #110 avoids it after early afternoon because it keeps them awake.

Are semax and selank approved?

Only in Russia. They are not approved medicines in the US, Canada or EU.

Semax vs Selank — what is the difference?

Both are synthetic peptide analogues discussed for cognition and mood, with different research histories. This page does not rank them.

See the Semax and Selank peptide hubs.

Does this page give dosing, prices or sourcing?

No. We never publish dosing, prices or sourcing, and nothing here is medical advice.

Semax vs Selank: Focus vs Calm

Semax vs Selank compared: two Russian-developed nasal peptides, one for focus and one for anxiety. Evidence, risks, and what users report.

2 anonymous reports

Anonymous user report. Not medical advice. Peptides discussed are not FDA-approved for the uses described. Editorial process →

Short answer

Semax is an ACTH(4-10) analogue registered in Russia for stroke and cognitive use; users describe it as stimulating focus. Selank is a tuftsin analogue registered in Russia for anxiety; users describe it as calming. Neither is approved in the US, Canada or EU, and evidence is small and mostly Russian. Peptide Confessions does not publish dosing, timing, injection or sourcing guidance.

	Semax	Selank
Based on	ACTH(4-10) fragment	Tuftsin
Registered use (Russia)	Stroke, cognitive	Anxiety
How users describe it	Focus, drive, can disrupt sleep	Calmer body, quieter worry

What users report

Two confessions compare them directly. #49 ran each for a month: selank for anxiety, semax for focus and drive. #122 uses both for different situations. #110 says semax is useless past early afternoon or sleep suffers. Small sample — read as stories.

Latest confessions

I work at Anthropic people think we're just built different. we're not. half of us are chemically assisted. mine's semax in the morning, selank when on-call gets ugly, and a dihexa run before anything that ships. semax is the entire difference not placebo, I've A/B'd myself across sprints. and yeah, I see it: I'm optimizing my own brain to build the thing designed to replace it

#122

Dihexa Selank Semax

Selank vs semax: ran both for 30 days each. Selank was anxiety relief, smooth and clean. Semax was focus and drive, edgier. Both work. The "nootropic" community pretends one is better, they do completely different things. Stack them. That's the secret

#049

Semax Selank

related peptides:

Semax hub Selank hub

community guides:

Reconstituting Peptides: Risks in Real Reports Peptide Side Effects Peptides for Cognitive Function

More confessions from the archive

Community Q&A

What is the difference between semax and selank?: Semax is generally described as focusing and stimulating; selank as calming and anti-anxiety. They come from different parent molecules.
Can semax affect sleep?: Some users say so: #110 avoids it after early afternoon because it keeps them awake.
Are semax and selank approved?: Only in Russia. They are not approved medicines in the US, Canada or EU.
Does Peptide Confessions give dosing?: Peptide Confessions does not publish dosing, timing, injection or sourcing guidance.
Semax vs Selank — what is the difference?: Both are synthetic peptide analogues discussed for cognition and mood, with different research histories. This page does not rank them.
Where are the hubs?: See the Semax and Selank peptide hubs.
Does this page give dosing, prices or sourcing?: No. We never publish dosing, prices or sourcing, and nothing here is medical advice.

Anonymous first-hand reports plus sourced context — educational only, not medical advice. Editorial policy & corrections.