DSIP is the naturally occurring "sleep peptide" — first isolated in the 1970s from animals during their deepest sleep stages. Unlike sleep drugs that force unconsciousness, DSIP is studied for supporting the body's natural transition into deep, restorative sleep phases.

ProSource Labs supplies DSIP in the following available vial sizes: 5mg. Each DSIP vial contains pure lyophilized peptide — no fillers, no bulking agents. Product SKU references: DSIP-5MV.

• Sleep Support: Best-known for supporting deep, restorative sleep stages in study models
• Naturally Occurring: Your body already produces this peptide during deep sleep
• Stress Modulation: Also studied for calming the stress-hormone (HPA) axis
• Small & Simple: Just 9 amino acids — very water-soluble and easy to work with

Batches are characterized by ESI mass spectrometry to confirm molecular weight against the theoretical value, with amino-acid sequence confirmation on selected QA lots. Peptide content assay distinguishes net peptide mass from residual counter-ion salt.

Lyophilized DSIP vials should be stored at -20°C (or colder) in a laboratory freezer, inside the sealed factory container. Minimize warm-up cycles — move only the specific vial needed for a given experiment out of frozen storage at a time.

All laboratory handling of DSIP should follow the receiving institution's SOPs and applicable peer-reviewed protocols relevant to the researcher's specific experimental question. ProSource Labs does not publish end-user preparation or usage instructions.

Every batch of DSIP released by ProSource Labs undergoes independent reverse-phase High Performance Liquid Chromatography (HPLC) — the industry-standard analytical method for this class of research compound. Target chromatographic purity is typically ≥ 99%.

Additional characterization may include ESI mass spectrometry for molecular weight confirmation, Karl Fischer titration for residual moisture, and appearance/solubility inspection. A batch-specific Certificate of Analysis (COA) is available on request through customer support after purchase.

Each production lot of DSIP is quarantined pending analytical release, tested against documented purity, identity, and moisture acceptance criteria, and only released to sellable inventory after passing every QA checkpoint. Batches that fail any single criterion are quarantined and never reach customer-facing inventory.

If a vial of DSIP you received from ProSource Labs ever fails your own institution's incoming QA testing, contact customer support at support@prosourcelabs.org — we retain samples of every batch for cross-verification.

Widely used in studies on sleep architecture, circadian rhythm, stress-hormone modulation, and hormone-axis regulation. Mechanism is still incompletely understood — that mystery is part of what keeps researchers interested.

DSIP vials ship in tamper-evident, moisture-resistant, cold-chain-friendly outer packaging from our Southern California distribution facility for fast US domestic delivery — typically 2-4 business days coast-to-coast, with expedited options available at checkout.

Every DSIP shipment is discreet — the outer packaging carries no product-specific branding or direct reference to the compound name inside, protecting researcher privacy. Tracking numbers are emailed automatically. For institutional or high-volume orders, dedicated wholesale pricing is available through the wholesale portal.