Peptide Field Reference

DSIP

Delta Sleep-Inducing Peptide — promote deep restorative sleep and regulate stress hormones naturally.

What is DSIP

DSIP (Delta Sleep-Inducing Peptide) is a naturally occurring neuropeptide discovered in 1974 by examining the blood of rabbits during slow-wave (delta) sleep. When transferred to awake rabbits, it induced delta sleep — a finding that sparked decades of research into sleep regulation. Browse the full peptide library for related sleep and mood compounds.

DSIP is found naturally in the human hypothalamus, pituitary, limbic system, and pineal gland, and circulates in the blood. Its levels rise during sleep and drop upon waking. For anxiety reduction without sedation during the day, consider Selank. Exogenous DSIP supplementation aims to enhance this natural signaling, promoting deeper and more restorative sleep.

Beyond sleep, DSIP has been studied for its stress-normalizing effects — it appears to reduce abnormally elevated cortisol while normalizing deficient cortisol, rather than simply suppressing it. For cognitive enhancement during waking hours, combine with Semax. This makes DSIP unique among sleep peptides and potentially useful for people with HPA axis dysregulation.

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How it works

Delta Sleep Promotion: DSIP increases the proportion of slow-wave (delta) sleep — the deepest, most restorative phase, critical for growth hormone release, memory consolidation, and cellular repair.

Cortisol Normalization: DSIP modulates the HPA (hypothalamic-pituitary-adrenal) axis, helping normalize abnormally high cortisol levels that are common in stressed individuals.

LH and GH Modulation: DSIP stimulates LH (luteinizing hormone) and GH (growth hormone) release, further amplifying the anabolic benefits of sleep.

On the ground in the Philippines

DSIP is not on the FDA Philippines registered drug list. No Manila pharmacy carries it — not Mercury Drug, not Watsons, not the hospital pharmacies. The only routes here are research-grade lyophilized powder ordered through compounding routes or imported personally. If you're searching Lazada or Shopee listings claiming 'DSIP capsules,' those are either mislabeled GABA blends or counterfeit — neither has the peptide in any active form.

Manila's heat and humidity are the real operational issue with DSIP. Reconstituted vials need to live at 2–8°C and the climb from your fridge to your bedside should be under 30 minutes. I keep a small insulated pouch with a frozen gel pack near the bed and reconstitute fresh every 14 days. If you're in a Makati or BGC condo and your fridge is across the unit, that's actually fine — just don't leave the vial out under aircon-warmed counter air for an hour while you scroll your phone.

Bureau of Customs treats unscheduled research peptides like DSIP under personal-import rules. Single small parcels (one or two vials) typically clear without intervention; bulk orders or anything declared as 'medication' get held. Most Manila researchers I know route through Singapore or Hong Kong forwarders rather than direct China shipments — clearance is faster and the cold-chain is real, not theatrical.

Hospitals · prescription routes

Makati Medical CenterMakatiSleep lab can run polysomnography to validate delta sleep response; no DSIP prescribing.
St. Luke's BGCBGCSleep medicine clinic; will run cortisol panels and overnight studies.
The Medical CityPasigEndocrinology can run AM/PM cortisol if you suspect HPA dysregulation.

Pharmacies · branches with confirmed stock

Mercury DrugNationwideDoes not stock DSIP. Carries melatonin and zolpidem (Rx).
WatsonsNationwideDoes not stock DSIP. Carries melatonin OTC.

Real PH pricing · observed

DSIP 5mg vial (research-grade)₱2,800–3,500$50–62International peptide suppliers, shipped to Manila
BAC water 30mL (compounding pharmacy)₱350–500$6–9Manila compounding pharmacies, BGC
Insulin syringes 31g (box of 100)₱650–900$12–16Mercury Drug, Watsons
Cortisol AM/PM panel₱2,200–2,800$39–50Hi-Precision, Makati Med outpatient

Customs · Import reality

Single-vial research peptide parcels almost always clear BOC without intervention when declared honestly as research chemicals at low value. Multi-vial bulk shipments or anything declared as 'pharmaceutical' draw scrutiny. Cold-chain matters more than legality here — DSIP degrades in transit if it sits in a Manila customs warehouse for a week, regardless of paperwork.

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Reported benefits

01Increased deep (delta) sleep duration
02Reduced sleep onset latency (fall asleep faster)
03Cortisol normalization in stress-dysregulated individuals
04Growth hormone release during sleep
05Reduced pain sensitivity (analgesic properties)
06Anti-stress and adaptogenic effects
07Improved mood and energy upon waking

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Dosing protocol

Suggested titration
Phase	Dose	Frequency	Duration
Sleep Induction	100–300mcg	30–60 min before sleep SC	2–4 weeks
Stress Protocol	100mcg	Evening SC	4 weeks

Always start at the lowest effective dose and titrate up gradually.

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Side effects

Common

Drowsiness after injection (expected)
Vivid dreams
Mild headache in some users

Rare

·Nausea at higher doses
·Dizziness

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Who should not use DSIP

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What to expect

Night 1–3

Drowsiness within 30–60 minutes. Many users report falling asleep faster and experiencing deeper, more vivid sleep.

Week 1–2

Sleep architecture improving. Better rested upon waking. Cortisol levels normalizing.

Week 3–4

Sustained improvements in sleep quality. Mood and energy during the day improving as a result.

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FAQ

Q-01

Is DSIP better than melatonin for sleep?

They work differently. Melatonin signals circadian timing (when to sleep). DSIP increases sleep depth (delta waves). They are complementary — some users take both. DSIP has more evidence for improving sleep quality and stress regulation.

Q-02

Can I use DSIP if I have insomnia?

DSIP may be particularly helpful for stress-related insomnia or difficulty reaching deep sleep. For severe insomnia, consult a physician. DSIP is not a first-line treatment for insomnia disorders. Source from the community-verified supplier list.

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Where to get DSIP in the Philippines

See our community-verified supplier list with COA verification and cold-chain shipping to the Philippines.

View Supply Index

Primary sources

Citations supporting the clinical claims on this page. Each entry links to the primary record.

[01]
Original DSIP isolation — Schoenenberger 1977
Mechanism
Schoenenberger GA, Monnier M. "Characterization of a delta-electroencephalogram (-sleep)-inducing peptide." PNAS 1977;74(3):1282–1286.
DOI: 10.1073/pnas.74.3.1282
[02]
DSIP review — still unresolved riddle
Review
Kovalzon VM, Strekalova TV. "Delta sleep-inducing peptide (DSIP): a still unresolved riddle." J Neurochem 2006;97(2):303–309.
DOI: 10.1111/j.1471-4159.2005.03522.x
[03]
Synthetic DSIP in disturbed human sleep
Trial
Schneider-Helmert D, Schoenenberger GA. "Effects of DSIP on chronic, treatment-resistant insomniacs." Experientia 1981;37(8):913–917.
PMID: 7286118
[04]
DSIP pharmacological update — Graf & Kastin
Review
Graf MV, Kastin AJ. "Delta-sleep-inducing peptide (DSIP): an update." Peptides 1986;7(6):1165–1187.
PMID: 3540888
[05]
FDA Philippines drug registry — DSIP not listed
Reference
FDA Philippines Registered Drug Products Database. Verified 2026-05-07: DSIP has no Philippine drug registration; available only as research-grade peptide.
Source

Risk · Disclosure · Editorial Status

This page is editorial information for adults researching peptide therapy. It is not medical advice, not a prescription, and not an endorsement of any specific product, supplier, or protocol. Side effects can be serious and individual response varies. Talk to a licensed physician — ideally one with peptide-specific clinical experience — before starting any compound, adjusting a dose, or discontinuing therapy.

In the Philippines, GLP-1 medications are prescription-only under FDA Philippines regulation. Research-grade peptides occupy a regulatory gray area: import for personal research use is generally tolerated, but the Bureau of Customs reserves the right to inspect and detain shipments. Do not import for resale.

Editorial Status

Independent · Non-clinical

Affiliation

Not a clinic · Not a pharmacy

Last Updated

May 7, 2026

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