PEPTIDE LIBRARY

Peptide Profiles

Education-first profiles for the peptides and GLP-1s most commonly used in optimization protocols. Each profile covers mechanism, dosing patterns, and the biomarkers you should be tracking - in context of what your protocol is actually doing.

HEALING

BPC-157

Body Protection Compound-157

Synthetic 15-amino-acid peptide derived from human gastric juice, studied for tissue repair and gut healing.

30–60 minutes (systemic), with extended local tissue half-life

TB-500

Thymosin Beta-4 (TB-500)

Systemic cell-migration and tissue-repair peptide, most commonly stacked with BPC-157 for the "Wolverine" recovery protocol.

~hours systemic; localized effects persist longer

GROWTH

Tesamorelin

Tesamorelin (Egrifta)

FDA-approved GHRH analog with the strongest IGF-1 response of any peptide in its class.

~26 minutes

MK-677

MK-677 (Ibutamoren)

Oral, once-daily growth hormone secretagogue. Technically a small molecule, not a peptide - but lumped into the category for protocol purposes.

~24 hours

Ipamorelin

Ipamorelin

Selective GH secretagogue that pairs with CJC-1295 as the gold-standard gentle GH-pulse stack.

~2 hours

CJC-1295

CJC-1295 (no DAC)

Synthetic GHRH analog that pairs with Ipamorelin for synergistic GH-pulse amplification.

~30 minutes (no DAC); several days (with DAC)

Sermorelin

Sermorelin (GHRH 1-29)

Original GHRH analog - gentlest response in the GH secretagogue family, good entry point for beginners.

~10–20 minutes

HGH

Human Growth Hormone (Somatropin)

Exogenous recombinant GH - the direct-injection option vs the pulsatile secretagogue approach.

~2–3 hours

GLP-1

Semaglutide

Semaglutide (Ozempic / Wegovy)

FDA-approved GLP-1 receptor agonist with the largest clinical evidence base for weight and glycemic outcomes.

~7 days

Tirzepatide

Tirzepatide (Mounjaro / Zepbound)

FDA-approved dual GIP/GLP-1 receptor agonist with superior weight loss efficacy vs semaglutide in head-to-head data.

~5 days

Retatrutide

Retatrutide (LY-3437943)

Investigational triple agonist (GLP-1 / GIP / glucagon) with the largest weight-loss effect of any compound yet reported in its class.

~6 days

COSMETIC

GHK-Cu

GHK-Cu (Copper Peptide)

Copper-binding tripeptide with systemic anti-inflammatory effects and the flagship peptide for skin, collagen, and wound healing.

~minutes in plasma; tissue effects persist much longer

SEXUAL HEALTH

PT-141

PT-141 (Bremelanotide)

Melanocortin receptor agonist - the only FDA-approved peptide for sexual arousal, marketed as Vyleesi.

~2 hours

ANTI-AGING

Epithalon

Epithalon (Epitalon)

Short tetrapeptide studied for telomere and pineal-axis effects in Russian longevity research.

~minutes in plasma; effects persist longer

MOTS-c

MOTS-c (Mitochondrial ORF of the 12S rRNA-c)

Mitochondrially-encoded peptide studied for metabolic and exercise-capacity effects.

Short; exact figures limited

IMMUNE

Thymosin Alpha-1

Thymosin Alpha-1 (Tα1)

Immune-modulating peptide with decades of clinical use in chronic infection and cancer-adjunct settings.

~2 hours

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Informational only - not medical advice. MyProtocolStack is a tracking and education platform. Work with a licensed provider before starting, changing, or stopping any protocol.