Peptide Research Articles & Protocol Guides | PeptideFox

Peptide Research

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

Featured

Are Peptides Legal in the US?

Peptide legality in the United States depends on FDA approval, prescribing, compounding, research-only sales, and sports rules. Each category has different limits.

SS-31 + MOTS-c Protocol: Mito Peptide Stack with NAD+

How SS-31 and MOTS-c work together with NAD+ to support cellular energy, metabolic flexibility, GLP-1 fatigue, and recovery. Explore primary research on the full protocol, dosing details, side-effects — with a detailed evidence breakdown and mechanistic underpinnings.

Oral GLP-1 Weight-Loss Medications

Oral semaglutide is available for weight loss, while orforglipron remains in development. Compare efficacy, side effects, dosing rules, and likely access.

Pinealon for Neuroprotection

Pinealon, or EDR, is a short peptide studied for neuron protection and cognitive aging. Most evidence comes from small studies with limited independent replication.

Retatrutide + NAD+ Protocol for Energy Support During Fat Loss

Retatrutide raises fat-oxidation demand. NAD+ supports beta-oxidation, energy stability, and fatigue resilience. PeptideFox research breaks down the evidence with a full protocol guide.

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.

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.

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.

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.

GLOW & KLOWWhich Blend to Pick, and How to Dose

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

Retatrutide + NAD+Critical Support Layer for GLP-1s

Retatrutide: Advanced StackDual-Axis Protocol to Protect Lean Mass

Build muscle and lose fat — at the same time. Original research by PeptideFox for an advanced retatrutide body recomposition stack with MOTS-c and Tesamorelin along with NAD+ to support fat oxidation, training output, and lean-mass preservation.

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. PeptideFox research breaks down the evidence with a full dosing protocol and 12-week timeline.

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

GLP-1s

Compound Guides

SemaglutideOzempic•Wegovy

Semaglutide is the GLP-1 drug sold as Ozempic and Wegovy. Trial data show how dose and titration affect weight loss, blood sugar, side effects, and maintenance.

TirzepatideMounjaro•Zepbound

Tirzepatide activates GIP and GLP-1 receptors and is sold as Mounjaro and Zepbound. Trials show its effects on weight, blood sugar, side effects, and maintenance.

RetatrutideTriple-Agonist GLP-1

Retatrutide is an investigational triple agonist that produced large weight-loss and liver-fat reductions in trials. Dosing, side effects, and long-term use remain under study.

Deep Dives

Retatrutide Side EffectsDose, Titration, and Phenotype

Retatrutide side effects rise with dose and often cluster around titration. Phase 2 data cover gastrointestinal symptoms, skin sensitivity, heart rate, and serious events.

Retatrutide vs TirzepatideSame Receptors, Different Drug

Retatrutide and tirzepatide differ in receptor activity, trial status, appetite effects, liver-fat data, and side effects. No direct head-to-head trial exists.

GLP-1 FatigueWhy It Happens and What Helps

Fatigue during GLP-1 treatment can come from a steep calorie deficit, dehydration, low protein intake, or dose escalation. The pattern points to the most likely cause.

GLP-1s and Cholesterol

Semaglutide, tirzepatide, and retatrutide can lower triglycerides and liver fat, but their effects on LDL and HDL differ. Trial data show where each drug helps.

Oral GLP-1 OptionsWegovy Pill•Orforglipron

Support Stacks for GLP-1sPreserving Lean Mass

Weight loss from semaglutide, tirzepatide, and retatrutide includes some lean mass. Trial data and practical measures clarify how to protect muscle and strength.

Protocols

Peptides

Articles

Are Peptides Legal?Regulatory Economics Explained

How to Stack PeptidesThe Complete Guide

A useful peptide stack starts with the limiting problem: appetite, lean mass, injury repair, mitochondrial energy, skin, growth hormone, or immune support.

Where to Inject PeptidesCompound-Level Breakdown

Injection site depends on the compound, route, and treatment goal. Compare abdominal, thigh, arm, local, intramuscular, and nasal use across common peptides and blends.

GH Releasing PeptidesSecretagogue Comparison

Compare growth hormone secretagogues by clinical use, hormone-release pattern, evidence, side effects, regulatory status, and studied dosing.

Anti-Aging

NAD+Injections & IV Therapy

NAD+ supports cellular energy and repair, but delivery routes are not interchangeable. IV therapy, injections, NR, and NMN differ in absorption, evidence, and dosing.

SS-31Elamipretide

SS-31, or elamipretide, targets damaged mitochondrial membranes and is FDA-approved for Barth syndrome. Other energy and longevity uses remain investigational.

GHK-CuCopper Peptide

GHK-Cu is a copper-binding peptide studied for skin repair, collagen production, scars, and hair growth. Topical evidence is stronger than claims made for injectable use.

EpitalonTelomerase Activator

Epitalon is a short peptide studied for telomerase activity, sleep, and age-related outcomes. Much of the human evidence comes from older Russian studies with important limits.

PinealonNeuroprotective Peptide

Metabolic / GH

MOTS-cMitochondrial Peptide

MOTS-c is a mitochondrial peptide studied for metabolic adaptation and exercise response. Research protocols cover dosing, reconstitution, timing, and stacking with SS-31 and NAD+.

AOD-9604Fat Loss Fragment

AOD-9604 is a growth hormone fragment studied for fat loss. Human obesity trials were disappointing, and current use rests on limited evidence rather than an approved indication.

TesamorelinGHRH Analog

Tesamorelin is FDA-approved to reduce excess abdominal fat in adults with HIV-associated lipodystrophy. Trials define its growth hormone effects, side effects, and monitoring.

SermorelinPioneer GH Peptide

Sermorelin stimulates the pituitary to release growth hormone. It was FDA-approved in 1997 and withdrawn in 2008 for commercial reasons, not a newly identified safety problem.

IpamorelinCleaner GH Pulse

Ipamorelin stimulates a short growth hormone pulse with less hunger, cortisol, ACTH, and prolactin release than older GHRPs. Evidence and studied timing define its likely role.

Healing & Tissue Repair

BPC-157Body Protection Compound

BPC-157 and Pentadeca Arginate are related repair compounds, but the arginate salt changes stability rather than creating a new mechanism. Human evidence remains limited.

TB-500Thymosin Beta-4 frag 17-23

TB-500 is a synthetic fragment associated with thymosin beta-4 research on cell migration and tissue repair. Human evidence for gray-market TB-500 protocols remains limited.

ARA-290Cibinetide

ARA-290, also called cibinetide, is an EPO-derived peptide studied for nerve pain and tissue repair. Human trials show where symptoms improved and where evidence remains limited.

Immune

Thymosin Alpha-1Immune Re-Education

Thymosin alpha-1, also called thymalfasin, changes immune signaling without broadly suppressing it. Clinical evidence varies by infection, cancer, and immune-related use.

KPVAnti-Inflammatory Tripeptide

KPV is a three-amino-acid peptide studied for inflammatory signaling in the gut, skin, mast cells, and brain-injury models. Human clinical evidence is still missing.

VIPImmune Tolerance Orchestrator

Vasoactive intestinal peptide, or VIP, affects immune balance, gut barrier function, blood flow, and circadian rhythm. Evidence depends on the condition and delivery route.

Cognitive

SemaxNeuroprotection & Cognitive Restoration

Semax is an experimental peptide studied for cognition and recovery after neurological injury. Nasal and injectable dosing differ; N-acetyl Semax and Adamax have separate sections.

SelankCalming Anxiety Without Sedation

Selank is an experimental peptide studied for anxiety without the sedation or dependence associated with some conventional drugs. Evidence is concentrated in Russian research.

Other

MelanotanMT-I vs MT-II Pharmacology

Melanotan I and Melanotan II differ in receptor selectivity, approved-drug history, sexual effects, and safety concerns. Neither is FDA-approved as a tanning drug.

DSIPSleep Architecture Peptide

DSIP is an experimental peptide studied for sleep structure, stress signaling, and circadian regulation. Human findings are mixed, and no standard clinical dosing protocol exists.

Guides

How to Reconstitute PeptidesStep-by-Step Visual Guide

Reconstituting peptides, step-by-step: preparation, mixing peptide powder with bacteriostatic (BAC) water, common mistakes to avoid, and storage instructions for reconstituted peptide vials. Plus, guidance on the right type of bacteriostatic water to reduce injection site reactions and irritation.