DSIP vs PE 22-28
Which should you choose? Here's what you need to know.
The short answer
DSIP and PE 22-28 are both cognitive / neuro peptides, but they work differently. Delta Sleep-Inducing Peptide, a neuropeptide studied for its role in sleep regulation, stress response, and circadian rhythm modulation. Compare vendor pricing and availability below.
On 9 Oct 2026 Peptide Compare tracked 52 vendors selling DSIP, cheapest in stock $3.15 per mg at Modern Research, and 20 selling PE 22-28, cheapest $3.46 per mg at Polaris Peptides.
DSIP
Cognitive / NeuroDelta Sleep-Inducing Peptide, a neuropeptide studied for its role in sleep regulation, stress response, and circadian rhythm modulation.
PE 22-28
Cognitive / NeuroPrice & 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
PE 22-28
$17.00
Starting from
$39.99
$9.55
Avg. price per mg
$6.22
52
Vendors selling it
20
48 options
In stock now
18 options
9.1/10
Top trust score
8.7/10
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Our top-rated vendor for each, based on trust scores, purity testing, and price.
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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.