For Research Purposes Only. This page summarizes published preclinical and clinical research. It does not constitute medical advice and is not a recommendation for human use.
DSIP
Delta sleep-inducing peptide — a nonapeptide studied for slow-wave sleep modulation and stress-hormone regulation.
01 · What is DSIP?
DSIP (delta sleep-inducing peptide) is a nine-amino-acid peptide first isolated in 1977 from the cerebral venous blood of rabbits in deep sleep. It has been studied for modulation of slow-wave sleep, stress-hormone regulation, and circadian rhythm effects. Its physiological role is still incompletely characterized, but research interest persists around sleep and stress models.
Sizes currently sold by tracked vendors: 100mg, 10MG, 10mg, 15mg, 20mg, 25mg, 2mg, 4mg, 50mg, 5mg, 8.9mg.
02 · Price comparison
Prices last checked Oct 26, 2026| Vendor | Sizes | Price range | Best $/mg | Stock |
|---|---|---|---|---|
| SaiyanMed | 2 | $55.00 – $97.00 | $0.97 | In stock |
| HkRoids | 2 | $53.00 – $101.00 | $1.01 | In stock |
| Nexaph | 1 | $178.00 | $1.78 | In stock |
| NUPEPS | 1 | $25.00 | $2.50 | In stock |
| Go Alpha Labs | 2 | $31.49 – $251.99 | $2.52 | In stock |
| NextechLabs | 1 | $29.25 | $2.92 | In stock |
| Peptidology | 2 | $47.19 – $50.00 | $3.15 | In stock |
| Peptides 4 Research | 1 | $45.00 | $4.50 | In stock |
| Verified Peptides | 1 | $47.50 | $4.75 | Out of stock |
| Royal Peptides | 3 | $45.00 – $550.00 | $5.50 | In stock |
| Injectify | 1 | $29.99 | $6.00 | In stock |
| Eternal Peptides | 2 | $34.99 – $59.99 | $6.00 | In stock |
| Peptide Partners | 3 | $75.00 – $305.00 | $6.10 | In stock |
| Paramount Peptides | 1 | $65.45 | $6.54 | In stock |
| Simple Peptide | 1 | $35.00 | $7.00 | In stock |
| Oasis Labs | 1 | $37.50 | $7.50 | In stock |
| Umbrella LabsVerified | 3 | $26.99 – $79.99 | $8.00 | In stock |
| Core Peptides | 1 | $41.00 | $8.20 | In stock |
| Amino Amigos | 1 | $35.00 | $8.75 | In stock |
| Biotech Peptides | 1 | $44.00 | $8.80 | In stock |
| Hydro Research | 1 | $45.00 | $9.00 | In stock |
| Raw AminoVerified | 1 | $46.00 | $9.20 | In stock |
| Biolongevity Labs | 1 | $55.97 | $11.19 | In stock |
| Behemoth Labz | 2 | $49.48 – $56.48 | $11.30 | In stock |
| Swiss Chems | 2 | $24.95 – $249.50 | $12.47 | In stock |
| Loti Labs | 1 | $29.99 | $14.99 | In stock |
26 vendors tracked · prices scraped weekly from vendor sites · open full comparison table →
03 · Third-party purity data
Full data at peptigrity.com ↗Independent HPLC test results — averages across multiple samples.
04 · Frequently asked questions
What is DSIP?
DSIP (delta sleep-inducing peptide) is a nine-amino-acid peptide first isolated in 1977 from the cerebral venous blood of rabbits in deep sleep. It has been studied for modulation of slow-wave sleep, stress-hormone regulation, and circadian rhythm effects. Its physiological role is still incompletely characterized, but research interest persists around sleep and stress models.
Is DSIP FDA approved?
No. DSIP is not FDA-approved and is sold strictly as a research chemical.
How much does DSIP cost?
Across 26 vendors tracked by PepVendors, DSIP currently runs $0.97–$14.99 per mg at each vendor's best price tier (25 showing in stock). Vial prices and size tiers vary — the live comparison table on this page lists current pricing.
Which vendors have third-party purity data for DSIP?
Independent labs (Finnrick Analytics, Janoshik) have published HPLC purity results for 21 samples of DSIP or its components: Eternal Peptides (99.9%), Royal Peptides (99.9%), NUPEPS (99.9%), Hydro Research (99.8%), Peptide Partners (99.8%), Oasis Labs (99.8%), Biolongevity Labs (99.8%), Loti Labs (99.7%), Polaris Peptides (99.6%), Verified Peptides (99.6%), Simple Peptide (99.5%), Core Peptides (99.5%), Amino Amigos (99.5%), HkRoids (99.5%), Peptidology (99.2%), Liberty Peptides (99.1%), Nexaph (99.0%), Umbrella Labs (99.0%), Paramount Peptides (98.0%), Injectify (97.2%), Limitless Life (95.9%). A grade A (≥98%) is the appropriate baseline for research use — check the linked lab reports for batch-level detail and fill-accuracy data.