DSIP Research Peptide

DSIP (Delta Sleep-Inducing Peptide) is a nonapeptide first isolated in 1977 during research into sleep-regulating factors. Its literature spans sleep-architecture models, HPA-axis (stress) regulation and neuroendocrine signalling, making it one of the longest-studied neuropeptides in the catalogue.

Noxptide DSIP is synthesised to ≥99% purity, independently verified by HPLC and mass spectrometry, and supplied with a batch-specific Certificate of Analysis.

Lyophilised, sterile-vialed and dispatched tracked from our UK facility.

Orders placed before 4pm Monday–Friday are dispatched the same working day. Standard tracked UK delivery (1–2 working days) is £4.99, or free on orders over £25; next-working-day delivery is available at checkout. All orders ship in plain, tamper-evident packaging with no external indication of contents.

Every order is covered by our 7-day money-back guarantee: if anything arrives damaged or incorrect, contact us within 7 days and we will replace it or refund you in full. Volume pricing applies automatically — 20% off orders over £150 and 30% off over £500. See our shipping page for full details, including European delivery.

Store at -20°C. After reconstitution, refrigerate at 2–8°C and use within 21 days.

Reconstitute under sterile laboratory conditions using bacteriostatic water. Handle only with appropriate laboratory PPE and procedures.

DSIP is supplied strictly for in-vitro laboratory research purposes only. It is not a medicine, supplement or cosmetic, and is not intended for human or veterinary use, consumption, or diagnostic purposes. By purchasing you confirm you are a qualified researcher or institution and agree to our Research Use Terms.