New — Free Peptide Starter Guide (2026): 13 chapters, 34 cited studies

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DS5

Also known as: Delta Sleep Inducing Peptide variant, DSIP variant, DS5 sleep peptide

DS5 is a synthetic variant of the delta sleep-inducing peptide (DSIP), a nonapeptide originally isolated from rabbit cerebrospinal fluid during slow-wave sleep. Like DSIP, DS5 is explored for sleep optimization, stress modulation, and circadian rhythm normalization, with proposed improvements in potency or stability over the parent molecule.

Half-Life

Estimated 30-60 minutes (peptide degradation)

Route

Subcutaneous, Intranasal (research)

Category

Sleep Optimization

Studies

50 references

Key Benefits

  • Promotes delta-wave (deep) sleep and improves sleep quality
  • May reduce sleep onset latency
  • HPA axis modulation for stress reduction
  • Non-addictive sleep support without tolerance development
  • Potential circadian rhythm normalization
  • Explored for insomnia, chronic stress, and PTSD-related sleep disturbance

Mechanism of Action

DS5 and DSIP derivatives are believed to act via modulation of hypothalamic-pituitary-adrenal (HPA) axis activity, reduction of corticotropin-releasing hormone (CRH) release, and facilitation of delta-wave (slow-wave) sleep architecture. They may interact with GABA-B receptors and opioid receptor subtypes to promote sleep onset and deepen sleep quality. The exact receptor binding profile of DS5 variants is not fully characterized.

Dosing Protocols

Sleep Optimization (Research)

Dose
200-500 mcg per dose
Frequency
Once nightly
Timing
30-60 minutes before desired sleep time
Cycle
2-4 weeks; cycle with breaks

Research compound. Often used as part of sleep peptide stacks. May be combined with DSIP for additive slow-wave sleep support. Use the minimum effective dose. Not commercially available as a drug; found via research peptide vendors.

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Side Effects

  • Generally well-tolerated in research subjects
  • Possible morning grogginess at higher doses
  • Mild blood pressure fluctuations reported with DSIP
  • Limited human safety data for DS5 specifically

Contraindications

Insufficient human data for definitive contraindicationsCaution with hypotension (blood pressure lowering reported with DSIP class)Pregnancy and breastfeeding: insufficient data

Storage

Lyophilized: store at -20 degrees C. Reconstituted: refrigerate at 2-8 degrees C and use within 30 days. Protect from light.

  1. 1.
    An antibody uniquely binding short 2'-O-methyl RNA oligonucleotide duplexes: formation and recognition of target duplexes on cell surfaces

    Dunn IS, Lawler MM, Fagundes L, Simoes Junior M, Mangold A, Rinaldi D et al. · Frontiers in immunology · 2025PubMed Verified

  2. 2.
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    Deep learning-guided engineering of pectinase for enhanced catalytic performance in tobacco processing

    Zheng X, Liu T, Qu X, Sun Z, Zhao X, Xu Y et al. · Bioresource technology · 2026PubMed Verified

  4. 4.
    Thermal resilience of olive accessions evaluated through pomological traits, lipid profile, and gene expression responses

    Hoveizeh NF, Gholami R, Zahedi SM, Kadkhodaei S, Alavipour S, Woodrow P et al. · BMC plant biology · 2025PubMed Verified

  5. 5.
    In silico design of novel precision vaccine targeting sclerostin epitopes for osteoporosis prevention and treatment

    Luo J, Wu T, Guan B, Li L, Yang Z, Tao H · Frontiers in immunology · 2025PubMed Verified

  6. 6.
    Advanced stage classical Hodgkin lymphoma patients with a positive interim-PET (PET-2) Deauville score 5 after 2 ABVD cycles: a pooled analysis of three multicenter trials

    Viviani S, Pavoni C, Barrington SF, Guerra L, Schöder H, Johnson P et al. · Blood cancer journal · 2025PubMed Verified

  7. 7.
    Radiotherapy With a 12-Gene Expression Assay for Ductal Carcinoma In Situ: A Randomized Clinical Trial

    Khan SA, Romanoff J, Gatsonis C, Rahbar H, Carlos R, Badve S et al. · JAMA oncology · 2025RCTPubMed Verified

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    Cariology-Competency Teaching Among Latin American Dental Schools Implementing the Regional Curriculum Framework: COM-B Analysis

    Sanabria A, Cortes A, Jácome-Liévano S, Avila V, Abreu-Placeres N, Aránguiz V et al. · European journal of dental education : official journal of the Association for Dental Education in Europe · 2025PubMed Verified

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    18F-FDG PET/CT Radiomics for Predicting Therapy Response in Primary Mediastinal B-Cell Lymphoma: A Bi-Centric Pilot Study

    Esposito F, Manco L, Urso L, Adamantiadis S, Scribano G, De Marchi L et al. · Cancers · 2025PubMed Verified

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    The pathogen of SFTS: Bandavirus dabieense phylogenetic analysis and development of an online tool for genotyping

    Wu H, Liu T, Mu Y, Zhang R, Yuan J, Xu Y et al. · Acta tropica · 2025PubMed Verified

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    Characterization and inhibition of hydrogen sulfide-producing bacteria from petroleum reservoirs subjected to alkali-surfactant-polymer flooding

    Hao Q, Zhang Y, Shi R, Zhao J, Li G, Min J et al. · Bioresource technology · 2025PubMed Verified

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    Genetic parameters for direct and maternal genetic components of calving ease in Korean Holstein Cattle using animal models

    Alam M, Lee JG, Dang CG, Lee SS, Lee SM, Seong HS et al. · Animal bioscience · 2024PubMed Verified

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    Caries lesions progression in adults: A prospective 2-year cohort study

    Abdalla H, Allison PJ, Madathil SA, Veronneau JE, Pustavoitava N, Tikhonova S · Community dentistry and oral epidemiology · 2025PubMed Verified

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    Omission of Radiotherapy in Primary Mediastinal B-Cell Lymphoma: IELSG37 Trial Results

    Martelli M, Ceriani L, Ciccone G, Ricardi U, Kriachok I, Botto B et al. · Journal of clinical oncology : official journal of the American Society of Clinical Oncology · 2024RCTPubMed Verified

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    sEMG-Based Robust Recognition of Grasping Postures with a Machine Learning Approach for Low-Cost Hand Control

    Mora MC, García-Ortiz JV, Cerdá-Boluda J · Sensors (Basel, Switzerland) · 2024PubMed Verified

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    Study on mechanical properties and acoustic emission characteristics of deep diorite under uniaxial compression

    Liu KD, Zhou Y, Zhang XP, Fu SJ, Liu QS, Dong P et al. · Heliyon · 2024PubMed Verified

  18. 18.
    GMFB/AKT/TGF-β3 in Müller cells mediated early retinal degeneration in a streptozotocin-induced rat diabetes model

    Zhu T, Li Y, Zhu L, Xu J, Feng Z, Chen H et al. · Glia · 2024PubMed Verified

  19. 19.
    A retrospective head-to-head comparison of the Lugano classification and PERCIST for FDG-PET/CT response assessment in diffuse large B-cell lymphoma

    Nielsen NB, Gerke O, Nielsen AL, Juul-Jensen K, Larsen TS, Møller MB et al. · Clinical physiology and functional imaging · 2024PubMed Verified

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    Induction of Innate Inflammatory Pathways in the Corneal Epithelium in the Desiccating Stress Dry Eye Model

    Yu Z, Yazdanpanah G, Alam J, de Paiva CS, Pflugfelder S · Investigative ophthalmology & visual science · 2023PubMed Verified

  23. 23.
    The Experimental Investigation on Mechanics and Damage Characteristics of the Aeolian Sand Paste-like Backfill Materials Based on Acoustic Emission

    Shao X, Tian C, Li C, Fang Z, Zhao B, Xu B et al. · Materials (Basel, Switzerland) · 2022PubMed Verified

  24. 24.
    Characterization of redox and salinity-tolerant alkaline protease from Bacillus halotolerans strain DS5

    Wen Y, Qiang J, Zhou G, Zhang X, Wang L, Shi Y · Frontiers in microbiology · 2022PubMed Verified

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    Positron emission tomography-imaging assessment for guiding strategy in patients with relapsed/refractory large B-cell lymphoma receiving CAR T cells

    Galtier J, Vercellino L, Chartier L, Olivier P, Tabouret-Viaud C, Mesguich C et al. · Haematologica · 2023PubMed Verified

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    Imaging Features and Prognostic Value of FDG PET/CT in Patients with Intravascular Large B-Cell Lymphoma

    Lim CH, Yoon SE, Kim WS, Lee KH, Kim SJ · Cancer management and research · 2021PubMed Verified

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    Predicting primary treatment failure using interim FDG-PET scanning in diffuse large B-cell lymphoma

    Wight J, Wai SH, Shen E, Lee ST, Berlangieri S, Fancourt T et al. · European journal of haematology · 2021PubMed Verified

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    Optimal timing and criteria of interim PET in DLBCL: a comparative study of 1692 patients

    Eertink JJ, Burggraaff CN, Heymans MW, Dührsen U, Hüttmann A, Schmitz C et al. · Blood advances · 2021PubMed Verified

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    One-electron oxidation of ds(5'-GGG-3') and ds(5'-G(8OG)G-3') and the nature of hole distribution: a density functional theory (DFT) study

    Kumar A , Adhikary A , Sevilla MD , Close DM · Physical chemistry chemical physics : PCCP · 2020PubMed Verified

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    A Gene Expression-based Model to Predict Metabolic Response After Two Courses of ABVD in Hodgkin Lymphoma Patients

    Luminari S, Donati B, Casali M, Valli R, Santi R, Puccini B et al. · Clinical cancer research : an official journal of the American Association for Cancer Research · 2020PubMed Verified

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    Persistent mediastinal FDG uptake on PET-CT after frontline therapy for Hodgkin lymphoma: biopsy, treat or observe?

    Novo M, Nowakowski GS, Habermann TM, Witzig TE, Micallef IN, Johnston PB et al. · Leukemia & lymphoma · 2020PubMed Verified

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    Monitoring Base-Specific Dynamics during Melting of DNA-Ligand Complexes Using Temperature-Jump Time-Resolved Infrared Spectroscopy

    Fritzsch R, Greetham GM, Clark IP, Minnes L, Towrie M, Parker AW et al. · The journal of physical chemistry. B · 2019PubMed Verified

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    Activating KIRs on Educated NK Cells Support Downregulation of CD226 and Inefficient Tumor Immunosurveillance

    Guillamón CF, Martínez-Sánchez MV, Gimeno L, Campillo JA, Server-Pastor G, Martínez-García J et al. · Cancer immunology research · 2019PubMed Verified

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    Bacillus sp. Acting as Dual Role for Corrosion Induction and Corrosion Inhibition with Carbon Steel (CS)

    Karn SK, Fang G, Duan J · Frontiers in microbiology · 2017PubMed Verified

  41. 41.
    Rapid identification of apple (Malus×domestica Borkh.) S alleles using sequencing-based DNA marker APPLid

    Kasajima I, Kikuchi T, Yoshikawa N · Plant biotechnology (Tokyo, Japan) · 2017PubMed Verified

  42. 42.
    Positron Emission Tomography/Computed Tomography Assessment After Immunochemotherapy and Irradiation Using the Lugano Classification Criteria in the IELSG-26 Study of Primary Mediastinal B-Cell Lymphoma

    Ceriani L, Martelli M, Gospodarowicz MK, Ricardi U, Ferreri AJ, Chiappella A et al. · International journal of radiation oncology, biology, physics · 2017PubMed Verified

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    Comparative Analytical Performance of Various HbA1c Assays in Iran

    Razi F, Rahnamaye Farzami M, Ebrahimi SA, Nahid M, Bigdeli MG, Sheidaei A et al. · Archives of Iranian medicine · 2016PubMed Verified

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    Effect of Feeding Diets Combining Whole-Grain Paddy Rice and High Levels of Fat on Broiler Chicken Growth

    Nanto F, Ito C, Kikusato M, Toyomizu M · The journal of poultry science · 2016PubMed Verified

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    Microbial keratitis following accelerated corneal collagen cross-linking

    Kodavoor SK, Sarwate NJ, Ramamurhy D · Oman journal of ophthalmology · 2015Case ReportPubMed Verified

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    Effect of the different assays of HbA1c on diabetic patients monitoring

    Razi F, Nasli Esfahani E, Rahnamaye Farzami M, Tootee A, Qorbani M, Ebrahimi SA et al. · Journal of diabetes and metabolic disorders · 2015PubMed Verified

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    Disease insights through cross-species phenotype comparisons

    Haendel MA, Vasilevsky N, Brush M, Hochheiser HS, Jacobsen J, Oellrich A et al. · Mammalian genome : official journal of the International Mammalian Genome Society · 2015ReviewPubMed Verified

  48. 48.
    Macrophage Phenotype in the Ocular Surface of Experimental Murine Dry Eye Disease

    You IC, Coursey TG, Bian F, Barbosa FL, de Paiva CS, Pflugfelder SC · Archivum immunologiae et therapiae experimentalis · 2015PubMed Verified

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    Using association rule mining to determine promising secondary phenotyping hypotheses

    Oellrich A, Jacobsen J, Papatheodorou I, Sanger Mouse Genetics Project, Smedley D · Bioinformatics (Oxford, England) · 2014PubMed Verified

  50. 50.
    Dendritic cell-derived thrombospondin-1 is critical for the generation of the ocular surface Th17 response to desiccating stress

    Gandhi NB, Su Z, Zhang X, Volpe EA, Pelegrino FS, Rahman SA et al. · Journal of leukocyte biology · 2013PubMed Verified

Medical disclaimer: This information is for educational purposes only and does not constitute medical advice. Many compounds listed are research chemicals not approved for human use. Always consult a qualified healthcare professional before starting any protocol.

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