Category
Research Fundamentals
57 articles
Peptide Research for Metabolic Syndrome: Insulin Resistance, Hypertension, and Dyslipidemia Protocols
A comprehensive research guide to metabolic syndrome biology and multi-compound peptide protocols: GLP-1 agonist data from STEP 1 and SELECT, MOTS-c AMPK/ACC mechanism, AOD-9604 β3-AR lipolysis, and NAD+/SIRT1 lipogenesis suppression — with 5-component endpoint battery, 8-group study design, and reconstitution/storage guidance.
Peptide Research for Cardiac Hypertrophy and Heart Failure: BPC-157, TB-500, SS-31, and GHK-Cu Protocol Design
A comprehensive protocol guide for cardiac hypertrophy and heart failure research using BPC-157, TB-500, SS-31, and GHK-Cu. Covers pathological hypertrophy pathways, 5 preclinical models, 10 key endpoints, 6-group study design, pharmacological controls, and reconstitution protocols.
Peptide Research for Nervous System Regeneration: BPC-157, SS-31, Semax, and Peripheral Neuropathy Protocols
A comprehensive research protocol guide covering BPC-157 axonal regeneration, SS-31 mitochondrial neuroprotection, and Semax BDNF/VEGF neurotrophic mechanisms for peripheral and central nervous system regeneration studies.
Peptide Research for Athletic Performance and Exercise Recovery: BPC-157, Ipamorelin, TB-500, and Endurance Endpoints
A comprehensive preclinical research guide covering the major compounds studied for exercise recovery, musculoskeletal repair, and performance endpoints. Covers BPC-157 tendon/muscle repair mechanisms, ipamorelin GH axis anabolic effects, TB-500 G-actin/ILK anti-inflammatory mechanism, and CJC-1295 IGF-1 elevation — including study design, dosing protocols, endpoint selection, and critical controls.
Peptide Bioavailability by Route of Administration: SC vs IP vs IN vs Oral — The Definitive Research Guide
A comprehensive reference covering subcutaneous, intraperitoneal, intranasal, intravenous, and oral peptide delivery routes — pharmacokinetics, bioavailability data, practical protocols, and study design implications for each compound class.
Peptide Research for Wound Healing: The Complete Protocol Reference
Definitive how-to guide for wound healing research design, model selection, histomorphometry protocols, and multi-compound stack design with BPC-157, GHK-Cu, and TB-500.
Peptide Research for Muscle Recovery: BPC-157, TB-500, and GHK-Cu — The Complete Protocol Guide
BPC-157, TB-500, and GHK-Cu target three distinct phases of muscle repair. This comprehensive guide covers published rodent data, combination protocol design, injection site rotation, endpoint selection, and the critical controls required to distinguish compound-specific effects in muscle recovery research.
The Comprehensive Recovery Stack: BPC-157, TB-500, GHK-Cu, and Ipamorelin — A Four-Compound Research Protocol Guide
A detailed research protocol guide for the four-compound recovery stack: BPC-157 (angiogenesis), TB-500 (actin dynamics/anti-inflammatory), GHK-Cu (ECM remodeling), and Ipamorelin/CJC-1295 (GH axis). Covers mechanistic complementarity, phase-mapped dosing, study design, endpoints, and reconstitution.
Peptide Research for Inflammation: COX-2, NF-κB, and Anti-Inflammatory Protocol Design
Comprehensive guide to designing preclinical anti-inflammatory peptide research studies. Covers COX-2/PGE₂ pathway, NF-κB signaling, key compounds (BPC-157, KPV, TB-500, LL-37, GHK-Cu), model selection, endpoint panels, and critical pharmacological controls.
Peptide Research for PCOS: GLP-1 Agonists, Kisspeptin, and Androgen Pathway Study Design
A comprehensive research protocol guide covering GLP-1 agonist PCOS data, kisspeptin-10 LH pulsatility normalization, androgen endpoint selection, letrozole/DHEA rodent models, and full factorial study design for polycystic ovary syndrome research.
GLP-1 Agonist Discontinuation: Rebound Pharmacology, Washout Design, and Re-initiation Research Protocols
A comprehensive research guide covering the biological mechanisms of weight regain after GLP-1 agonist discontinuation, published clinical and preclinical rebound data, optimized washout period design, and re-initiation protocol strategies for researchers.
Peptide Research for Arthritis and Joint Inflammation: BPC-157, KPV, TB-500, and GHK-Cu Protocol Design
A comprehensive research protocol guide for arthritis and joint inflammation models. Covers BPC-157, KPV, TB-500, and GHK-Cu mechanisms, validated animal models (CIA, AIA, ACLT), endpoint selection, multi-compound study design, and critical controls.
Peptide Water Retention and Electrolyte Research: What the Data Shows
A researcher's guide to understanding water retention, sodium balance, and electrolyte endpoints in peptide studies — covering MK-677, GH secretagogues, GLP-1 agonists, and aldosterone-pathway interactions. Includes study design recommendations and measurement protocols.
Peptide Research for Skeletal Muscle: Hypertrophy, Repair, and Performance Endpoints
A comprehensive researcher's guide to skeletal muscle biology in peptide studies — covering hypertrophy pathways (Follistatin/myostatin, IGF-1/mTOR, GH axis), repair mechanisms (BPC-157, TB-500, GHK-Cu), performance endpoints (grip strength, rotarod, EDL/soleus contractility), and multi-compound study design. Includes preclinical dosing protocols and endpoint selection rationale.
Peptide Research for Cardiac Protection: BPC-157, TB-500, SS-31, and GLP-1 Agonists
A comprehensive guide to preclinical cardiac research with peptides — covering ischemia-reperfusion models, myocardial infarction protocols, BPC-157 and TB-500 cardiac data, SS-31 cardiolipin protection, GLP-1 agonist cardiac outcomes, and study design best practices.
Sex Differences in Peptide Research: Female Dosing, Hormonal Cycles, and Protocol Adjustments
Estrogen, progesterone, and androgen levels modulate GLP-1R expression, GH axis pulsatility, OTR density, and wound-healing kinetics. A researcher's guide to sex-stratified protocols, cycle-matched sampling, and dose adjustments for female subjects.
Peptide Research Funding: NIH Grants, IACUC, and Regulatory Frameworks
A practical guide for academic peptide researchers: NIH grant mechanisms (R01/R21/R03), SABV sex-as-a-biological-variable requirements, IACUC protocol elements, FDA RUO classification, DEA scheduling considerations, and publication best practices for peptide research compliance.
100 Articles: The Complete Nexphoria Research Library Overview
A milestone overview of the Nexphoria Research Journal — 100 articles spanning compound profiles, GH axis pharmacology, metabolic research, longevity, immunology, nootropics, handling and storage, quality assurance, and research fundamentals. Includes curated reading paths by research goal and our top 10 essential reads for new researchers.
Neuroinflammation Research: Microglia, NLRP3, and Peptide Interventions
Comprehensive research guide to neuroinflammation: microglial activation states, NLRP3 inflammasome signaling, and peptide compounds modulating CNS inflammatory pathways. Covers GLP-1 agonists, BPC-157, Selank, Semax, Cerebrolysin, and SS-31 with published data, rodent protocols, and study design considerations.
Peptide Research Publication Guide: Methods, Disclosure, Pre-registration, and Open Science Best Practices
A practical guide for researchers writing up peptide studies for publication — covering compound sourcing transparency, ARRIVE 2.0 compliance, statistics reporting standards, pre-registration, data deposition, and how to write methods sections that pass peer review.
GPCR Pharmacology in Peptide Research: Second Messengers, Biased Agonism, and Receptor Trafficking
A comprehensive guide to G protein-coupled receptor pharmacology for peptide researchers. Covers Gαs/Gαq/Gαi signaling, β-arrestin biased agonism, receptor internalization, desensitization, and how receptor pharmacology shapes study design and endpoint selection.
Peptide Degradation and Proteolysis: DPP-4, NEP, and Endopeptidase Resistance Strategies
A comprehensive research guide to the enzymatic barriers that limit peptide half-life — DPP-4, neprilysin, aminopeptidases, and the structural strategies used to resist degradation in preclinical models.
Blood-Brain Barrier and Peptide CNS Delivery: Research Strategies and Study Design
A researcher's guide to the blood-brain barrier and peptide CNS access — tight junction pharmacology, transport mechanisms, BBB penetration data for major research peptides, ICV/intranasal delivery strategies, and study design considerations for central vs peripheral mechanism dissection.
Peptide Research for Kidney Health: Renoprotection, GLP-1 Agonists, and Study Design
A researcher's guide to renal endpoints, peptide mechanisms relevant to kidney health — GLP-1 agonists, BPC-157, SS-31, and NAD+ — rodent nephropathy models, and study design best practices.
Peptide Research for Bone Health: BPC-157, GHK-Cu, and GH Axis Compounds
A comprehensive research guide on peptides studied for bone health: BPC-157 periosteal/osteoblast data, GHK-Cu collagen/TGF-β1 mechanism, ipamorelin/CJC-1295 IGF-1-mediated anabolic effects, and study design for skeletal research models.
Peptide Research for Ocular Health: BPC-157, SS-31, GHK-Cu, and the Eye
A comprehensive research guide to peptide interventions in ocular biology — covering BPC-157 corneal wound healing, SS-31 retinal mitochondrial protection, GHK-Cu trabecular meshwork, and GLP-1 agonist diabetic retinopathy data. Rodent model selection, endpoints, and study design.
Peptide Research for Skin Health: GHK-Cu, Snap-8, and Cosmetic Peptide Study Design
A comprehensive guide to peptide research in dermatology and skin biology — covering GHK-Cu collagen mechanisms, Snap-8 SNARE disruption, melanocortin biology, wound healing model selection, and study design for skin repair research.
Peptide Research for Pain and Inflammation: BPC-157, KPV, and Nociceptive Pathway Study Design
A comprehensive guide to peptide research in pain biology and inflammation — covering BPC-157 anti-inflammatory mechanisms, KPV NF-κB inhibition, endogenous opioid neuropeptide biology, model selection for nociception research, and study design for preclinical pain studies.
Peptide Biomarkers for Monitoring Research Protocols: What to Track and When
A comprehensive guide to selecting, timing, and interpreting biomarkers in peptide research protocols. Covers GH axis, metabolic, repair, longevity, and immunology panels with sampling timing and assay recommendations.
Peptide Research for Weight Loss and Metabolic Optimization: A Complete Protocol Guide
A comprehensive research protocol guide covering GLP-1 agonists, GIP/GCGR triple agonists, MOTS-c, AOD-9604, and metabolic peptide combinations for preclinical obesity and metabolic dysfunction research. Includes DIO model design, endpoint selection, and published dose-response data.
Testosterone, the HPG Axis, and Research Peptides: Kisspeptin, LH, and Hormone Endpoint Study Design
A comprehensive research guide covering HPG axis pharmacology, testosterone biosynthesis, kisspeptin-driven LH pulse regulation, relevant peptide interventions, and validated endpoint selection for rodent hormone research.
Peptide Research for Respiratory Health: BPC-157, NAD+, SS-31, and Pulmonary Study Design
A comprehensive researcher's guide to pulmonary peptide research: BPC-157 in ALI/ARDS models, NAD+/SIRT1 mitochondrial protection in alveolar epithelium, SS-31 in pulmonary hypertension and I/R, GLP-1 agonist anti-inflammatory data, model selection, endpoints, and study design.
Peptide Research for Reproductive and Fertility Biology: Kisspeptin, BPC-157, and Gonadal Axis Study Design
A comprehensive researcher's guide to reproductive biology peptide research: kisspeptin HPG axis protocols, BPC-157 in reproductive tissue models, oxytocin in parturition and social bonding, hormone endpoint design, and study considerations for fertility researchers.
Peptide Research and the Gut Microbiome: BPC-157, GLP-1 Agonists, and Microbiota Study Design
How research peptides interact with the gut microbiome: BPC-157 mucosal cytoprotection, GLP-1 agonist microbiome remodeling, measurement methods (16S rRNA, shotgun metagenomics), and rigorous microbiome co-endpoint study design for preclinical research.
GLP-1 Agonists for Diabetes Research: T1D, T2D Models, HbA1c, and Glycemic Study Design
A comprehensive protocol guide for researchers studying GLP-1 agonists in type 1 and type 2 diabetes models. Covers STZ, NOD, DIO, db/db models, GTT/ITT/GSIS endpoints, HbA1c measurement, and study design principles for semaglutide, tirzepatide, and retatrutide.
Peptide Synergy Stacking: The Science of Combining Research Compounds
A research-grade framework for understanding compound synergy vs additivity vs antagonism — covering receptor-orthogonal synergy, temporal phase complementarity, pathway amplification, and common pitfalls when designing multi-compound research protocols.
Peptide Research in 2026: Semaglutide, Tirzepatide, and the GLP-1 Revolution
How the GLP-1 receptor agonist research revolution unfolded from 2020–2026: key clinical milestones (STEP 1, SURMOUNT-1, SELECT, retatrutide Phase 2), what researchers are studying now, and the next frontier of incretin pharmacology.
Oxytocin Research Protocols: Intranasal vs IP Administration Deep Dive
A technical deep dive into oxytocin research administration routes — comparing intranasal vs intraperitoneal delivery, buffer composition, volume standardization, behavioral endpoint timing, critical controls (L-368,899, OTR-KO), sex-dependent effects, and confounds for rigorous oxytocin research design.
GHK-Cu in Wound Healing Research: Protocols and Study Design
A practical experimental guide for GHK-Cu wound healing studies. Covers the three main rodent model types (excisional, incisional, burn), published topical and systemic dose ranges, application timing, endpoint selection (planimetry, H&E, Masson's trichrome, CD31/VEGF/α-SMA), critical control design (vehicle + free GHK + GHK-Cu + Cu salt), and reconstitution for topical vs systemic delivery.
The Ultimate Guide to Research Peptides 2026
A comprehensive 2026 overview of research peptides — classifications, mechanisms of action, quality standards, sourcing criteria, storage protocols, and the current landscape of peptide science. Everything a researcher needs to navigate this rapidly evolving field.
GLP-1 Agonists for Cardiovascular Research: What the SELECT and LEADER Trials Tell Us
An in-depth analysis of the major cardiovascular outcome trials for GLP-1 receptor agonists — LEADER, SUSTAIN-6, SELECT, SURPASS-CVOT — and what the mechanistic data means for preclinical cardiac and vascular research design.
GLP-1 Agonists and the Brain: Central Mechanisms Beyond Weight Loss
GLP-1 receptor agonists do far more than suppress appetite. This research review covers the central GLP-1R signaling pathways driving neuroprotection, dopamine modulation, addiction circuits, and cognition — with preclinical models and study design guidance.
Peptide Half-Life Optimization: Strategies Researchers Use to Extend Compound Activity
Native peptides degrade rapidly in vivo. This review covers the chemical and formulation strategies researchers apply to extend peptide half-life — from amino acid substitutions and PEGylation to albumin binding, cyclization, and controlled-release matrices.
Mouse vs Rat in Peptide Research: Model Selection Guide for Study Design
Choosing the wrong animal model is one of the most common avoidable errors in peptide research. This guide covers the decision matrix for mouse vs rat, strain selection for GH axis, GLP-1, repair, and longevity research, with allometric scaling tables and model-specific protocols.
Peptide Research Lab Setup: Equipment, Safety, and Best Practices
Everything a researcher needs to set up a proper peptide research lab: minimum equipment list, sterile technique, needle disposal, IACUC requirements, record keeping, blinding and randomization SOPs.
Insulin-Like Growth Factor 1 (IGF-1) vs Growth Hormone: The Downstream Mediator Explained
A deep technical dive into the GH/IGF-1 axis: GHR/JAK2/STAT5b/IGF-1 hepatic synthesis, IGFBP-3 ternary complex, why IGF-1 is the standard proxy endpoint for GH secretagogue research, reference ranges by strain/sex/age, and critical confounders in endpoint design.
PCSK9 and Peptides: Emerging Cardiovascular Research Targets
PCSK9 proprotein subtilisin kexin type 9 LDL receptor degradation mechanism, monoclonal antibody and siRNA therapeutic inhibition, peptide-based PCSK9 inhibitor research, standard rodent CV models, and the connection to GLP-1 agonist cardiovascular endpoint design.
Complete Blood Panel Guide for Peptide Researchers
Which lab markers to track, when to sample, reference ranges by species and sex, and how to interpret CBC, CMP, hormone panels, and specialized biomarkers when running peptide research protocols.
Peptide Research Statistics: Sample Size, Power Calculations, and Data Analysis
A practical guide to G*Power, effect sizes, ANOVA, post-hoc tests, and reporting standards for preclinical peptide research. How many animals do you need, and what statistics should you use?
CRH, the HPA Axis, and Stress Peptide Research: A Researcher's Guide
How corticotropin-releasing hormone (CRH) drives the HPA stress cascade, how peptides like BPC-157, Selank, and KPV modulate it, and why cortisol and corticosterone must be controlled in any peptide study measuring GH axis, immune, or behavioral endpoints.
Understanding Peptide Bioassay Controls: Vehicle, Negative, and Positive Controls Explained
The most common mistake in beginner peptide research is inadequate control design. Learn how to properly design vehicle controls, negative controls, receptor-antagonist positive controls, pair-fed controls, and sham-surgery controls for research-grade preclinical peptide studies.
IC50, EC50, Ki, and Kd: Understanding Binding Affinity Data in Peptide Research
A practical guide to interpreting IC50, EC50, Ki, and Kd values in peptide pharmacology literature. Learn what each metric measures, how they're determined, and how to use them to compare compound potency, select doses, and design better in vivo studies.
GLP-1 Agonists and Neurodegeneration: Parkinson's, Alzheimer's, and TBI Research
Central nervous system GLP-1R expression, UPDRS improvement in Parkinson's trials, amyloid-beta plaque reduction mechanisms, TBI neuroinflammation data, and research design considerations for CNS endpoints.
Peptide Administration Routes: SC, IP, IV, and Intranasal Compared
A researcher's guide to subcutaneous, intraperitoneal, intravenous, and intranasal peptide administration — pharmacokinetics, bioavailability data, tissue distribution, and how to choose the right route for your study design.
Peptide Bioavailability: Why Route of Administration Changes Everything
An in-depth guide to peptide bioavailability — covering absolute bioavailability measurement, first-pass effects, peptide absorption barriers, flip-flop PK, oral peptide degradation, and when parenteral or intranasal routes are required for meaningful research outcomes.
How to Use BPC-157 and TB-500 Together: Dosing, Timing, and Protocol Design
A step-by-step research protocol guide for the BPC-157 + TB-500 stack — covering published rodent doses, reconstitution walkthrough, timing rationale, injection sites, weekly schedule template, 3-month cycle design, and biomarker tracking.
What Are Peptides? A Researcher's Primer
A foundational overview of peptide biochemistry — what they are, how they work, why they're studied, and what distinguishes research-grade compounds from lower-quality alternatives.