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Peptide Database

Goals
Fat LossMuscle BuildingInjury HealingAnti-AgingCognitive EnhancementSleep OptimizationImmune SupportGut HealingSkin RejuvenationSexual Health
Peptides
5-Amino-1MQ
Weight Management
Abarelix
Hormone Support
Acetyl Hexapeptide-3 (Argireline)
Cosmetic
Adipotide
Weight Management
Adrenomedullin
Healing & Recovery
Alexamorelin
Growth Hormone
Angiotensin (1-7)
Healing & Recovery
AOD-9604
Weight Management
Apelin-13
Healing & Recovery
ARA-290 (Cibinetide)
Healing & Recovery
Bestatin (Ubenimex)
Immune
BPC-157
Healing & Recovery
Buserelin
Hormone Support
Cagrilintide
Weight Management
CagriSema
Weight Management
Capromorelin
Growth Hormone
Cartalax
Anti-Aging
Cathelicidin (hCAP-18 / Synthetic Derivatives)
Immune
Cerebrolysin
Cognitive
Cerluten
Cognitive
Cetrorelix
Hormone Support
Chonluten
Immune
CJC-1295 (No DAC)
Growth Hormone
CJC-1295 with DAC
Growth Hormone
Cortexin
Cognitive
Crystagen
Immune
Daptomycin
Immune
Defensin (HBD-2)
Immune
Defensin (HBD-3)
Immune
Degarelix
Hormone Support
Dihexa
Cognitive
DSIP (Delta Sleep-Inducing Peptide)
Sleep & Recovery
Dulaglutide
Weight Management
Enalapril
Healing & Recovery
Epithalon
Anti-Aging
Exenatide
Weight Management
Fertirelin
Hormone Support
FOXO4-DRI
Anti-Aging
Ganirelix
Hormone Support
GHK-Cu (Copper Peptide)
Cosmetic
GHRH (1-29)
Growth Hormone
GHRP-2
Growth Hormone
GHRP-6 (Growth Hormone Releasing Peptide-6)
Growth Hormone
Glutathione
Anti-Aging
Gonadorelin (GnRH)
Hormone Support
Gramicidin
Immune
Hexarelin
Growth Hormone
Human Chorionic Gonadotropin (HCG)
Hormone Support
Human Growth Hormone (HGH)
Growth Hormone
IGF-1 LR3
Growth Hormone
Immunoxel (Dzherelo)
Immune
Imunofan
Immune
Intermedin (Adrenomedullin-2)
Healing & Recovery
Ipamorelin
Growth Hormone
Kisspeptin-10
Sexual Health
KPV (Alpha-MSH Fragment)
Healing & Recovery
Lactoferricin B
Immune
Larazotide
Healing & Recovery
Lentinan
Immune
Leuphasyl
Cosmetic
Leuprolide
Hormone Support
Liraglutide
Weight Management
Livagen
Anti-Aging
Lixisenatide
Weight Management
LL-37
Immune
Macimorelin
Growth Hormone
Magainin-2
Immune
Mazdutide
Weight Management
Melanotan-2
Cosmetic
MK-677 (Ibutamoren)
Growth Hormone
MOTS-c
Metabolic
Myristoyl Pentapeptide-17
Cosmetic
N-Acetyl Selank
Cognitive
N-Acetyl Semax Amidate
Cognitive
NAD+
Mitochondrial
Nafarelin
Hormone Support
Natriuretic Peptide (ANP)
Healing & Recovery
Nesiritide (BNP)
Healing & Recovery
Nisin
Immune
Noopept (Omberacetam)
Cognitive
Orforglipron
Weight Management
Ovagen
Anti-Aging
Oxytocin Acetate
Hormone Support
P21 (P021)
Cognitive
PACAP-38
Healing & Recovery
Palmitoyl Oligopeptide
Cosmetic
Palmitoyl Pentapeptide-4 (Matrixyl)
Cosmetic
Palmitoyl Tetrapeptide-7
Cosmetic
Palmitoyl Tripeptide-1
Cosmetic
Pancragen
Metabolic
PEG-MGF
Healing & Recovery
Pemvidutide
Weight Management
Pentadecapeptide (BPC Analog)
Healing & Recovery
Pidotimod
Immune
Pinealon
Cognitive
PNC-27
Immune
Polymyxin B
Immune
Pralmorelin (GHRP-2)
Growth Hormone
Pramlintide
Weight Management
Prostamax
Hormone Support
PT-141 (Bremelanotide)
Sexual Health
Relaxin-2 (Serelaxin)
Healing & Recovery
Retatrutide
Weight Management
Selank
Cognitive
Semaglutide
Weight Management
Semax
Cognitive
Sermorelin
Growth Hormone
Setmelanotide
Weight Management
SLU-PP-332
Metabolic
SM-130686
Growth Hormone
Snap-8
Cosmetic
SS-31 (Elamipretide)
Mitochondrial
Substance P Antagonists
Healing & Recovery
Survodutide
Weight Management
SYN-AKE
Cosmetic
Tabimorelin
Growth Hormone
TB-500
Healing & Recovery
Tesamorelin
Growth Hormone
Testagen
Hormone Support
Thymalin
Immune
Thymopentin (TP-5)
Immune
Thymopoietin
Immune
Thymosin Alpha-1
Immune
Thymosin Beta-4
Healing & Recovery
Thymulin (FTS)
Immune
Thymulin Analog (PAT)
Healing & Recovery
Tirzepatide
Weight Management
Tripeptide-29
Cosmetic
Triptorelin
Hormone Support
Ularitide
Healing & Recovery
Urocortin
Healing & Recovery
Ventfort
Anti-Aging
Vesilute
Hormone Support
Vilon
Immune
VIP (Vasoactive Intestinal Peptide)
Healing & Recovery
Xenin-25
Metabolic
Ziconotide (Prialt)
Healing & Recovery
Total Peptides: 137
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Condition Spotlight

Sarcopenia
Reclaiming Your Strength

After 60, your muscles don't disappear overnight - they fade quietly. You wake up one day and realize climbing stairs leaves you winded, or you struggled to open a jar that you used to open easily. That's sarcopenia. It affects between 1 in 10 to 1 in 2 older adults, and it's one of the most preventable causes of disability and loss of independence.

Written by Michael Carroll — Owner, Director of Research · Reviewed by the Peptide Initiative Research Team · Editorial standards

The Problem

Your Muscles Are Shrinking
And Your Body Has Stopped Building Them

Loss of Strength

Tasks that used to be easy now feel impossible

Visible Muscle Loss

Arms and legs look thinner, less defined

Increased Fall Risk

Less muscle means less stability and shock absorption

Understanding Muscle Aging

Why Your Muscles Stop Growing After 60

Your muscles are living tissues that constantly break down and rebuild. This process is driven by growth hormone (GH) and insulin-like growth factor-1 (IGF-1) - hormones that peak in your 20s and gradually decline thereafter. By age 60, your GH secretion has dropped by roughly 50%. By 80, it's down 70-80%. Without adequate GH and IGF-1, your muscles shift from a building mode to a net loss mode. Your body breaks down muscle faster than it rebuilds it, a process called protein catabolism. The result? You lose approximately 3-5% of muscle mass per decade after age 30, accelerating after 60. This isn't cosmetic - it directly impacts your ability to live independently.

"Muscle loss isn't inevitable aging - it's a consequence of declining hormones that can be addressed."

Growth hormone peptides don't replace natural aging, but they restore your body's ability to build and maintain muscle tissue. Myostatin inhibitors go further - they remove the brakes that prevent muscle growth. Together, they address the root cause of sarcopenia.

The Solutions

5 Peptides
5 Angles of Attack

2005

CJC-1295

The GH Stimulator

A synthetic growth hormone-releasing hormone (GHRH) analog that signals your pituitary gland to produce more natural growth hormone.

Role

Turning up the volume on your body's natural GH production

1998

Ipamorelin

The Selective GH Secretagogue

A ghrelin receptor agonist that stimulates growth hormone release while avoiding unwanted effects like cortisol elevation.

Role

The gentler way to wake up your GH system

Approved 2010

Tesamorelin

The Long-Acting GH Trigger

A long-acting GHRH analog that provides sustained growth hormone stimulation with once-daily dosing.

Role

Setting a slow-release reminder for your pituitary to keep making GH

1957

IGF-1 / IGF-1 LR3

The Direct Muscle Builder

The downstream hormone that does the actual muscle-building work - the direct signaler for muscle protein synthesis and anabolism.

Role

The frontline worker that actually builds muscle tissue

Learn more

1990 (myostatin discovery), 2010s+ (therapeutic development)

Follistatin

The Myostatin Silencer

A myostatin inhibitor that blocks the natural growth-limiting signal, allowing muscles to grow without the biological brakes.

Role

Removing the governor that limits how much muscle your body can build

Learn more

The Strategy

How They Work Together
Together

PeptidePrimary RoleAnalogy
CJC-1295

The GH Stimulator

Turning up the volume on your body's natural GH production

Ipamorelin

The Selective GH Secretagogue

The gentler way to wake up your GH system

Tesamorelin

The Long-Acting GH Trigger

Setting a slow-release reminder for your pituitary to keep making GH

IGF-1 / IGF-1 LR3

The Direct Muscle Builder

The frontline worker that actually builds muscle tissue

Follistatin

The Myostatin Silencer

Removing the governor that limits how much muscle your body can build

5 Angles of Attack

GH Axis Stimulation

CJC-1295, Ipamorelin, and Tesamorelin collectively stimulate your pituitary to produce more natural growth hormone

Direct Muscle Signaling

IGF-1 provides the downstream anabolic signal that directly triggers muscle protein synthesis

Remove Growth Brakes

Follistatin blocks myostatin, removing the biological limit on how much muscle you can build

Multiplicative Effect

Together they amplify each other - GH stimulates IGF-1, IGF-1 signals growth, follistatin removes limits

Important Considerations

Reality Check
What to Keep in Mind

Requires Training Stimulus

These peptides amplify the response to resistance training, but won't build muscle without it. You must train consistently for results.

Individual Variation

Age, baseline fitness, genetics, and consistency all affect results. Expect 50-150% variation between individuals.

Medical Supervision Important

Work with a healthcare provider experienced in peptide therapy and aging. Monitoring of GH, IGF-1, and metabolic markers matters.

Not a Quick Fix

Real muscle rebuilds over months, not weeks. Consistency in training, nutrition, and peptide protocols matters more than intensity.

This information is for educational purposes only and should not be considered medical advice. Always consult with a qualified healthcare provider before starting any new treatment.

Realistic Expectations

What to Expect: A Realistic Timeline

An honest breakdown based on research and clinical reports.

What's Happening Inside

The peptides are initiating hormonal cascades. GH secretion is increasing. IGF-1 levels are beginning to rise. Myostatin is being inhibited. But visible muscle changes haven't happened yet - this is the foundation.

What You Might Notice

  • Possible increased appetite (GH effect)
  • Better sleep quality (common GH effect)
  • Slight improvement in energy
  • No visible strength gains yet - patience required

Watch For

Some people report mild water retention (part of GH's metabolic effects). This is temporary and normalizes.

Realistic Expectations

Nothing dramatic yet. You're preparing your body for growth.

Administration Guide

Dosing Protocols & Timing

General guidelines based on research literature and clinical reports. Work with a healthcare provider experienced in peptide therapy to customize for your situation.

Important: These are general guidelines. Don't self-prescribe based on internet articles. Work with a qualified healthcare provider.

CJC-1295

100-200 mcg per injection

Common Protocols

  • Conservative: 100 mcg subcutaneous injection, twice weekly (Monday/Thursday)
  • Standard: 100-150 mcg subcutaneous injection, twice weekly
  • Aggressive: 150-200 mcg subcutaneous injection, twice weekly
  • Some practitioners use thrice weekly dosing for enhanced GH secretion

Timing Considerations

  • Ideally administered 30-60 minutes before exercise for synergistic effect
  • Evening dosing (1-2 hours before sleep) aligns with natural GH surge during sleep
  • Morning dosing also acceptable for convenience
  • Avoid food 30 minutes before and after injection (insulin antagonistic to GH)

Cycling

8-16 weeks on, 2-4 weeks off, or continuous protocols depending on goals

Beyond Peptides

Lifestyle Strategies for Living Well

Peptides work best as part of a comprehensive approach. Click each category to explore evidence-based strategies.

At a Glance

Quick Reference Card

Peptide Overview

PeptideWhat It DoesTypical DoseTiming
CJC-1295
The GH Stimulator100-200 mcg per injectionIdeally administered 30-60 minutes before exercise for synergistic effect
Ipamorelin
The Selective GH Secretagogue200-400 mcg per injectionMorning and evening dosing is typical to maintain elevated GH throughout the day
Tesamorelin
The Long-Acting GH Trigger0.1-0.2 mg dailyEvening injection (before bed) aligns with natural GH surge during sleep
IGF-1 / IGF-1 LR3
The Direct Muscle Builder50-200 mcg per applicationBest applied to clean, dry scalp
Follistatin
The Myostatin Silencer100-300 mcg per injectionPost-exercise timing (within 30-60 minutes after strength training) optimizes anabolic response

Early Wins to Watch

  • Improved strength in first 3-4 weeks
  • Better recovery between workouts
  • Visible muscle definition by month 2
  • Noticeably easier daily activities

Support Stack

Whey protein (post-workout)Creatine monohydrate (5g daily)Leucine supplementationVitamin D (especially if deficient)Omega-3 fatty acidsMagnesium (supports muscle function)Zinc (supports testosterone and protein synthesis)

Lifestyle Priorities

  • Consistent resistance training (2-3x/week minimum)
  • Adequate protein intake (1.2-1.6g/kg body weight)
  • Quality sleep (7-9 hours nightly)
  • Progressive training intensity
  • Consistency over perfection

Sarcopenia robs people of independence. It leads to falls, fractures, disability, and loss of the ability to live the life you want. But it's not inevitable. These peptides, combined with resistance training, offer a genuine pathway to reclaiming strength, rebuilding muscle, and restoring independence. The results are measurable, visible, and life-changing.

You built your first muscles in your teens and twenties. You can rebuild them now - it just requires different tools. Age isn't an excuse; it's just a different starting point.