DSIP vs LL-37
Overview
DSIP is primarily a sleep & recovery peptide, while LL-37 is used for immune support.
This page compares DSIP and LL-37 across their primary use, typical dosing, reported benefits and side effects, and U.S. regulatory status. For the full monograph on either compound — mechanism of action, clinical research, and references — follow the article links.
Side-by-side comparison
| DSIP | LL-37 | |
|---|---|---|
| Category | Sleep & Recovery | Immune Support |
| Regulatory status (US) | Compounding (Rx) — Apr 2026 | Compounding (Rx) — Apr 2026 |
| Typical dosage | 100-300 mcg | 2-5 mg |
| Frequency | before bed | twice weekly |
| Reported benefits | Improved deep sleep, stress reduction, recovery enhancement, pain reduction | Antimicrobial activity, immune modulation, wound healing, anti-inflammatory |
| Reported side effects | Very well-tolerated, possible grogginess | Generally safe, minimal side effects |
Key differences
Primary use. DSIP is categorised under Sleep & Recovery, while LL-37 falls under Immune Support. Their differing categories mean they are usually chosen for different goals rather than as direct substitutes.
Regulatory status. DSIP: not FDA-approved; compounding permitted with a prescription as of April 2026. LL-37: not FDA-approved; compounding permitted with a prescription as of April 2026.
Dosing. DSIP is typically dosed at 100-300 mcg (before bed). LL-37 is typically dosed at 2-5 mg (twice weekly).
Can you stack them?
Some protocols combine peptides, but stacking DSIP and LL-37 has not been validated for safety or efficacy in controlled trials. Combining compounds can change their effects and risks. Nothing here is medical advice — consult a qualified healthcare provider before starting or combining any protocol.
Frequently asked questions
- What is the difference between DSIP and LL-37?
- DSIP is primarily a sleep & recovery peptide, while LL-37 is used for immune support. DSIP is not FDA-approved; compounding permitted with a prescription (as of April 2026), whereas LL-37 is not FDA-approved; compounding permitted with a prescription (as of April 2026).
- What is DSIP used for?
- Delta sleep-inducing peptide.
- What is LL-37 used for?
- Antimicrobial defense peptide.
- Can you take DSIP and LL-37 together?
- Some users combine peptides within a single protocol, but stacking DSIP and LL-37 has not been established as safe or effective in controlled trials. Neither this comparison nor PeptideSciences101 is medical advice — consult a qualified healthcare provider before combining any compounds.
- Is DSIP or LL-37 FDA-approved?
- DSIP is not FDA-approved; compounding permitted with a prescription (as of April 2026). LL-37 is not FDA-approved; compounding permitted with a prescription (as of April 2026).