DSIP vs Selank
Which should you choose? Here's what you need to know.
The short answer
DSIP is specifically a sleep peptide that promotes deeper delta-wave sleep. Selank is an anti-anxiety peptide that can help with sleep indirectly by reducing the anxiety that keeps you awake.
On 9 Oct 2026 Peptide Compare tracked 52 vendors selling DSIP, cheapest in stock $3.15 per mg at Modern Research, and 56 selling Selank, cheapest $1.63 per mg at Bio Pepz.
DSIP
Cognitive / NeuroDSIP (Delta Sleep-Inducing Peptide) specifically promotes slow-wave delta sleep — the deep, restorative phase your body uses for physical recovery. It helps you fall asleep faster and sleep more efficiently.
Choose DSIP if:
Your primary problem is sleep quality — you need deeper, more restorative sleep regardless of anxiety levels.
Selank
Cognitive / NeuroSelank is an anxiolytic peptide that reduces anxiety through GABA and serotonin modulation. While not a sleep drug, it can improve sleep quality by calming the racing thoughts that prevent rest.
Choose Selank if:
Your sleep issues stem from anxiety or an overactive mind at bedtime, and you also want daytime anxiety relief.
Price & availability
Once you've decided which peptide fits your needs, here's how they compare on price and vendor options. Prices verified Oct 9, 2026.
DSIP
Selank
$17.00
Starting from
$15.00
$9.55
Avg. price per mg
$13.25
52
Vendors selling it
56
48 options
In stock now
64 options
9.1/10
Top trust score
9.1/10
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Where does this data come from?
We re-check vendor prices continuously and score vendors on Finnrick blind-test results — samples bought anonymously and sent to a lab, not vendor claims. No vendor can pay to rank higher. See our full methodology.