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    Peptide Research

    How peptides work, why protocols are structured the way they are, and what to expect — organized by topic.

    Ask FoxAIPeptide research chat backed by the PeptideFox knowledge graph and peer-reviewed papers.

    Featured

    Are Peptides Legal? The Practical US Answer

    Peptide legality depends on the pathway: approved drug, compounded prescription, supplement, research chemical, or sport/work rule. Here is the practical US map.

    Read guide→

    SS-31, MOTS-c, and NAD+The Mito Stack

    How SS-31 and MOTS-c work together with NAD+ to support cellular energy, metabolic flexibility, GLP-1 fatigue, and recovery. Full protocol and dosage details.

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    Oral GLP-1sWegovy vs Orforglipron

    There's now a pill version of semaglutide, and orforglipron is coming. How they compare on weight loss, side effects, and cost — and if its right for you.

    Read guide→

    PinealonNeuroprotection & Cognitive Support

    Pinealon (EDR) protects neurons from oxidative damage. Dosing, what the evidence actually shows, and how it differs from Semax for cognitive support.

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    Reconstitute Peptides - A Visual GuideSwirl, Don't Shake

    Step-by-step walkthrough of BAC water types, needle gauges, techniques, water volume by peptide vial size, and storage — and the common mistakes to avoid at each step.

    Read guide→

    NAD+ for RetatrutideEnergy Support During Fat Loss

    Retatrutide raises fat-oxidation demand. NAD+ supports beta-oxidation, energy stability, and fatigue resilience during a structured retatrutide protocol.

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    Protocols

    BPC-157 + TB-500The Wolverine Stack for Injuries

    How to combine BPC-157 and TB-500 for injury recovery. Dosing, weekly schedule, cycle length, and what to expect as you heal.

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    Injury Recovery ProtocolBuild the Right Peptide Stack

    Peptide protocol for injury recovery — built on BPC-157 + TB-500 + NAD+, with situational additions for tendon, joint, shoulder, disc, nerve, and post-surgical injuries.

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    Immune Peptide ProtocolTA1, KPV, NAD+ & More

    Peptides for immune support work best as a phased protocol — NAD+, Selank, glutathione, KPV, thymosin alpha-1, and thymulin sequenced with dose and safety data.

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    Circadian Reset ProtocolVIP, DSIP, Pinealon & Epitalon

    How to reset circadian rhythm with behavioral anchors, DSIP, Selank, VIP, optional Pinealon, and pineal-restoration courses when indicated. Diagnostic framework, timing map, and evidence.

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    GLOW & KLOWProtocols for Anti-Aging & Skin Health

    GLOW peptide cocktail of GHK-Cu, BPC-157, and TB-4 for skin rejuvenation. KLOW adds KPV for inflammation. How to choose — plus dosing and protocol guides.

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    NAD+ for RetatrutideCritical Support Layer for GLP-1s

    Retatrutide raises fat-oxidation demand. NAD+ supports beta-oxidation, energy stability, and fatigue resilience during a structured retatrutide protocol.

    Read guide→

    Retatrutide: Advanced StackDual-Axis Protocol to Protect Lean Mass

    An advanced retatrutide recomp protocol using NAD+, MOTS-c, L-Carnitine, and Tesamorelin to support fat oxidation, training output, and lean-mass preservation.

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    NAD+ and MOTS-c for EnergyThe Two-Compound Mito Stack

    The NAD+ and MOTS-c stack supports the cellular adaptation loop that metabolic stress, GLP-1 use, and age can strain. Full protocol with dosing breakdowns and a 12-week timeline.

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    SS-31, MOTS-c, & NAD+The Peptide Stack for Youthful Energy

    How SS-31 and MOTS-c work together with NAD+ to support cellular energy, metabolic flexibility, GLP-1 fatigue, and recovery. Full protocol and dosage details.

    Read guide→

    GLP-1s

    Compound Guides

    SemaglutideOzempic•Wegovy

    Semaglutide dosing ranges from 0.25mg to 2.4mg a week. How much weight loss to expect by dose, side effects during titration, and if Ozempic or Wegovy is right for you.

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    TirzepatideMounjaro•Zepbound

    Tirzepatide dosing ranges from 2.5mg to 15mg. Explore trial data for weight loss, side effects vs. semaglutide, and if Mounjaro or Zepbound makes sense for you.

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    RetatrutideTriple-Agonist GLP-1

    Retatrutide is an investigational triple agonist. What the trial data show for weight loss and liver fat, where microdose logic is supported, and where the evidence still needs caution.

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    Deep Dives

    Retatrutide vs TirzepatideSame Receptors, Different Drug

    Retatrutide and tirzepatide are not stronger/weaker versions of the same drug. Tirz is the steadier default; reta adds glucagon, liver-fat leverage, and much higher titration risk.

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    GLP-1 FatigueWhy It Happens and What Helps

    GLP-1 fatigue explained: why semaglutide, tirzepatide, and retatrutide cause tiredness, which compound causes more, and evidence-based fixes from protein to mitochondrial support.

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    GLP-1s and Cholesterol

    GLP-1 drugs also improve lipid panels—lowering triglycerides, shifting LDL, and reducing liver fat. Trial data for semaglutide, tirzepatide, and retatrutide.

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    Oral GLP-1 OptionsWegovy Pill•Orforglipron

    There's now a pill version of semaglutide, and orforglipron is coming. How they compare on weight loss, side effects, and cost — and if its right for you.

    Read guide→

    Support Stacks for GLP-1sPreserving Lean Mass

    GLP-1 body composition explained: semaglutide, tirzepatide, and retatrutide lean-mass data, why muscle loss happens, and how to protect strength during weight loss.

    Read guide→

    Protocols

    NAD+ for RetatrutideCritical Support Layer for GLP-1s

    Retatrutide raises fat-oxidation demand. NAD+ supports beta-oxidation, energy stability, and fatigue resilience during a structured retatrutide protocol.

    Read guide→

    NAD+ and MOTS-c for EnergyThe Two-Compound Mito Stack

    The NAD+ and MOTS-c stack supports the cellular adaptation loop that metabolic stress, GLP-1 use, and age can strain. Full protocol with dosing breakdowns and a 12-week timeline.

    Read guide→

    Retatrutide: Advanced StackDual-Axis Protocol to Protect Lean Mass

    An advanced retatrutide recomp protocol using NAD+, MOTS-c, L-Carnitine, and Tesamorelin to support fat oxidation, training output, and lean-mass preservation.

    Read guide→

    Peptides

    Articles

    Are Peptides Legal?Regulatory Economics Explained

    Peptide legality depends on the pathway: approved drug, compounded prescription, supplement, research chemical, or sport/work rule. Here is the practical US map.

    Read guide→

    How to Stack PeptidesThe Complete Guide

    How to choose a peptide stack by goal: GLP-1 support, injury recovery, mitochondrial energy, GLOW/KLOW, GH peptides, immune support, and post-GLP-1 maintenance.

    Read guide→

    Where to Inject PeptidesCompound-Level Breakdown

    Where to inject BPC-157, TB-4, TB-500, GHK-Cu, semaglutide, tirzepatide, NAD+, SS-31, MOTS-c, GLOW, KLOW, and more.

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    GH Releasing PeptidesSecretagogue Comparison

    Tesamorelin, Ipamorelin, Sermorelin, CJC-1295, MK-677, and older GHRPs compared by use case, dosing, side effects, evidence, and regulatory context.

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    Anti-Aging

    NAD+Injections & IV Therapy

    A practical guide to NAD+ injections, oral NR and NMN precursors, IV therapy, route selection, dosing, and where NAD+ fits in peptide protocols.

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    SS-31Elamipretide

    SS-31 (elamipretide) is FDA-approved for Barth syndrome and targets mitochondria directly — How it works, off-label use for energy and longevity, and dosing in the Mito Stack.

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    GHK-CuCopper Peptide

    GHK-Cu is a copper peptide that remodels skin, fades scars, and may help with hair loss. Topical vs injectable protocols, timelines, and what to expect.

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    EpitalonTelomerase Activator

    Epitalon activates telomerase, and is directly linked to biological aging. Dosing protocols, what the Russian research shows, and if its worth consideration.

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    PinealonNeuroprotective Peptide

    Pinealon (EDR) protects neurons from oxidative damage. Dosing, what the evidence actually shows, and how it differs from Semax for cognitive support.

    Read guide→

    Metabolic / GH

    MOTS-cMitochondrial Peptide

    MOTS-c is a peptide that mimics the metabolic benefits of exercise — learn why it's a cornerstone of the Mito Stack with SS-31 and NAD+

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    AOD-9604Fat Loss Fragment

    Anti-Obesity Drug 9604 is an abandoned research peptide that still has a niche as a fat-loss accelerant in conjunction with GLP-1 weight loss therapy.

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    TesamorelinGHRH Analog

    Tesamorelin is the only FDA-approved GH secretagogue. Explore Phase III trial data, VAT reduction percentages, side effects, and how it compares to HGH.

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    SermorelinPioneer GH Peptide

    Sermorelin was FDA-approved in 1997 and withdrawn in 2008 — not for safety, but business. Here is what the clinical evidence actually shows today.

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    IpamorelinCleaner GH Pulse

    Ipamorelin is the modern GHRP-style peptide for a short bedtime GH pulse with less hunger, cortisol, ACTH, and prolactin spillover than older GHRPs.

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    Healing & Tissue Repair

    BPC-157Body Protection Compound

    BPC-157 and Pentadeca Arginate (PDA): how the repair peptide works, dosing protocols, regulatory status, and what the arginate salt actually changes.

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    TB-500Thymosin Beta-4 frag 17-23

    TB-500 enables cell migration for tissue repair. How it works, dosing protocols, human clinical data, and how to combine it with BPC-157.

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    ARA-290Cibinetide

    ARA-290 is the first peptide shown to regenerate small fiber nerves. How it works, what the clinical trials found, and current dosing protocols.

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    Immune

    Thymosin Alpha-1Immune Re-Education

    Thymosin alpha-1 (TA1) modulates immunity by expanding regulatory T-cells, not suppressing them. Mechanism, clinical evidence, safety, and FDA status.

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    KPVAnti-Inflammatory Tripeptide

    KPV is a tripeptide from alpha-MSH that blocks NF-kB via a receptor-independent PepT1 pathway. Preclinical gut, skin, and TBI evidence reviewed.

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    VIPImmune Tolerance Orchestrator

    Vasoactive intestinal peptide (VIP) is a 28-amino-acid neuropeptide that orchestrates immune tolerance, gut barrier integrity, and circadian synchronization.

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    Cognitive

    SemaxNeuroprotection & Cognitive Restoration

    Semax drives neuroplasticity with the same mechanism behind exercise'\''s cognitive benefits. Injection and nasal dosage — plus 40 years of Russian clinical data.

    Read guide→

    SelankCalming Anxiety Without Sedation

    Selank calms anxiety without sedation, cognitive dulling, or dependence — How it works, Russian clinical trial data, and dosing for injection and nasal spray.

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    Other

    MelanotanMT-I vs MT-II Pharmacology

    Melanotan I and II compared — receptor selectivity, clinical trials, melanoma evidence, gray-market risks, and next-generation melanocortin agents.

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    DSIPSleep Architecture Peptide

    DSIP (delta sleep-inducing peptide) modulates slow-wave sleep architecture without sedation. Evidence review, circadian context, and dosing guide.

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    Guides

    How to Reconstitute PeptidesStep-by-Step Visual Guide

    Step-by-step walkthrough of BAC water types, needle gauges, techniques, water volume by peptide vial size, and storage — and the common mistakes to avoid at each step.

    Read guide→

    Support Stacks for GLP-1sPreserving Lean Mass

    GLP-1 body composition explained: semaglutide, tirzepatide, and retatrutide lean-mass data, why muscle loss happens, and how to protect strength during weight loss.

    Read guide→

    How to Stack PeptidesThe Complete Guide

    How to choose a peptide stack by goal: GLP-1 support, injury recovery, mitochondrial energy, GLOW/KLOW, GH peptides, immune support, and post-GLP-1 maintenance.

    Read guide→