A naturally occurring neuropeptide studied in preclinical sleep-pathway research. The Peptide Index files it under Sleep-research peptide. Vendors also list it as “Delta Sleep-Inducing Peptide”.
As of Sep 25, 2026, the lowest listed price is $2.61/mg and the median current listing is $7.00/mg, across 118 vendors (151 comparable single-compound listings). Prices are normalized to US dollars per milligram of peptide, exclude shipping, and are refreshed nightly.
In the nightly price history, the daily median fell from $8.10/mg on Jul 14, 2026 to $7.00/mg on Sep 25, 2026 (−13.6%), based on 67 observed days. Days the crawl missed are left out, not filled in. The daily series is taken across each day’s comparable listings, so it can differ slightly from the current-listings median above. See the full DSIP price history chart.
| Vendor | $/mg | Price (USD) | Package |
|---|---|---|---|
| Crush Research | $2.61/mg | $26.10 | 10mg vial |
| Nationwide Peptides | $3.13/mg | $47.00 | 15mg vial |
| Puratek Peptides | $3.50/mg | $34.95 | 10mg vial |
| Sigma Peptides | $3.50/mg | $34.99 | 10mg vial |
| NG Peptide | $3.50/mg | $35.00 | 10mg vial |
Each vendor name links to its public-record trust profile. The DSIP price page lists every current listing.
Every night The Peptide Index reads vendors’ public catalog pages, records the listed price and stated peptide content, and divides one by the other to get a comparable $/mg. Blends and topical/cosmetic products are excluded from single-compound figures. Read the full methodology and how vendor signals are checked.