Head-to-Head

Semax vs Selank (2026): Nootropic Peptides Compared

📅 July 16, 2026 ⏱ 5 min read 🔄 Updated daily

Semax and Selank are the two most-searched nootropic (cognitive) peptides, and they're often confused. The short version: Semax leans stimulating/focus, Selank leans calming/anxiolytic — which is exactly why they're studied together. Research use only; not medical advice.

Semax — focus and BDNF

Semax is a short peptide studied for cognition, attention and neuroprotection, associated with BDNF and dopaminergic signaling. It's generally described as the more stimulating/focus-oriented of the pair.

Selank — calm and anxiolytic

Selank is studied for anxiety and mood, associated with GABA/serotonin modulation. It's the calming counterpart.

Why they're stacked

Because their profiles are complementary — focus + calm — Semax and Selank are a classic synergistic cognitive pairing (and even sold as a pre-made blend). See the stacking guide. There are also N-Acetyl versions with longer stability.

Head-to-head

	Semax	Selank
Profile	Focus / stimulating	Calm / anxiolytic
Associated with	BDNF, dopamine	GABA, serotonin

Compare prices

Both usually ship in 10 mg vials. PepsTracker compares Semax, Selank and the blend across 26 vendors on cost-per-mg. Platinum Peptides carries them, 15% off with pepstracker15.

Frequently asked questions

What is the difference between Semax and Selank?

Semax is studied for focus and cognition (BDNF/dopaminergic), while Selank is studied for anxiety and mood (GABA/serotonin). Semax is the more stimulating and Selank the more calming of the pair.

Can you stack Semax and Selank?

Yes — their complementary focus-plus-calm profiles make them a classic synergistic cognitive pairing, also sold as a pre-made blend.

How do I compare Semax and Selank prices?

PepsTracker normalizes both to cost-per-milligram across 26 vendors with discount codes applied.

📊 Compare all 26 vendors on live $/mg →