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    The Stack

    May 13, 2026 • Uncategorized

    Peptide Purity Testing: HPLC & Mass Spec Standards

    Understand peptide purity testing: RP-HPLC purity grades, mass spec identity confirmation, and LAL endotoxin assays for rigorous preclinical research standards.

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    • Uncategorized

    Blood-Brain Barrier Peptide Transport: Research Overview

    Preclinical research on blood-brain barrier peptide transport: BBB structure, exclusion mechanisms, and CNS-penetrant peptides Selank, Semax, and Pinealon.

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    • Uncategorized

    Oral Peptide Enteric Coating: Release Mechanism Research

    Enteric coating oral peptide research: pH-responsive polymers, dissolution thresholds, release mechanisms, and in vitro testing for preclinical studies.

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    • Uncategorized

    NAD+ and DNA Repair: PARP Enzyme Research in Aging

    Explore preclinical research on NAD+ DNA repair mechanisms, PARP-1 enzyme activity, and NAD+ depletion in aged animal tissues. Strictly for research contexts.

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    • Uncategorized

    Pinealon vs Epithalon: Bioregulator Peptide Research

    Pinealon vs Epithalon: a preclinical comparison of two Khavinson bioregulator peptides — mechanisms, study models, epigenetic effects, and key differences.

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    • Uncategorized

    CJC-1295 vs Tesamorelin: GHRH Analog Research Comparison

    CJC-1295 vs Tesamorelin: compare GHRH analog structures, half-lives, GH pulse patterns, IGF-1 profiles, and body composition findings in preclinical models.

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    • Uncategorized

    Melanotan-2 CNS Research: Melanocortin Neuroprotection

    Explore Melanotan-2 CNS research: MC3R/MC4R expression, neuroprotection in TBI and ischemia models, microglial NF-κB suppression, and oxidative stress data.

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    • Uncategorized

    Semax: BDNF Research and Neuroprotective Mechanisms

    Semax BDNF research: rodent brain models, VEGF expression, MCAO stroke data, and melanocortin receptor mechanisms reviewed from peer-reviewed literature.

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    • Uncategorized

    Retatrutide: Triple Receptor Agonist Research (2026)

    Retatrutide triple agonist research: GLP-1R, GIPR, and glucagon receptor mechanisms, Phase 2 NEJM 2023 trial data, and preclinical metabolic comparisons.

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    • Uncategorized

    MOTS-c Exercise Mimetic Research: AMPK and Metabolism

    Explore MOTS-c as an exercise mimetic in preclinical research: AMPK activation, GLUT4 translocation, PGC-1α upregulation, and metabolic effects in rodent models

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    Posts pagination

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    THE STACK · RESEARCH NOTES

    Research archive.

    70 papers across 8 compound categories.

    AllCompound Deep DivesUncategorizedOral Delivery ScienceTissue Repair ResearchGut Health ResearchPeptide Science 101Research Protocols & StacksThird-Party Testing & Purity

    UNCATEGORIZED

    Peptide Purity Testing: HPLC & Mass Spec Standards

    Understand peptide purity testing: RP-HPLC purity grades, mass spec identity confirmation, and LAL endotoxin assays for rigorous preclinical research standards.

    Read the paper →May 13, 2026
    1. 02Blood-Brain Barrier Peptide Transport: Research OverviewUNCATEGORIZEDMay 13, 2026
    2. 03Oral Peptide Enteric Coating: Release Mechanism ResearchUNCATEGORIZEDMay 13, 2026
    3. 04NAD+ and DNA Repair: PARP Enzyme Research in AgingUNCATEGORIZEDMay 13, 2026
    4. 05Pinealon vs Epithalon: Bioregulator Peptide ResearchUNCATEGORIZEDMay 13, 2026
    5. 06CJC-1295 vs Tesamorelin: GHRH Analog Research ComparisonUNCATEGORIZEDMay 13, 2026
    6. 07Melanotan-2 CNS Research: Melanocortin NeuroprotectionUNCATEGORIZEDMay 13, 2026
    7. 08Semax: BDNF Research and Neuroprotective MechanismsUNCATEGORIZEDMay 13, 2026
    8. 09Retatrutide: Triple Receptor Agonist Research (2026)UNCATEGORIZEDMay 13, 2026
    9. 10MOTS-c Exercise Mimetic Research: AMPK and MetabolismUNCATEGORIZEDMay 13, 2026
    Page 1 of 7Older →
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