PepScribe

The Peptide Library

Research-backed answers on peptide therapy — what the science says, what the law says, and what’s actually available.

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Primer · 6 min read

What are peptides?

Peptides are short chains of amino acids — the same building blocks that proteins are made of, just smaller. Your body produces thousands naturally as signaling molecules: telling cells when to divide, when to heal, when to release a hormone, when to sleep. A primer on how therapeutic peptides use that language.

Read the primer
Peptides 101Mechanism

Latest

Fresh research, guides, and explainers — recently published.

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Benefits of HRT for Menopause

How hormone replacement therapy is studied for menopause symptoms, and what the current evidence says.

Hormone Health · 7 min read
Menopause
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Do GLP-1 Pills Work?

Oral GLP-1 options compared — what works, what the research supports, and what to watch for.

Weight · 5 min read
Weight

Available now

Physician-prescribed peptide therapies you can start today — compounded in the USA by licensed 503A pharmacies. No hidden overseas supply chain.

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Tier 1 · Available

Sermorelin

Growth-hormone-releasing hormone analog. Supports recovery, sleep quality, and natural GH pathways.

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RecoverySleep
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Tier 1 · Available

NAD+

Nicotinamide adenine dinucleotide. Supports cellular energy production, DNA repair, and daily resilience.

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EnergyLongevity
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Tier 1 · Available

Semaglutide

GLP-1 receptor agonist for appetite regulation and weight management. Compounded for clinically qualifying patients.

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Weight
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Tier 1 · Available

Tirzepatide

Dual GIP/GLP-1 receptor agonist targeting two incretin pathways. Compounded for clinically qualifying patients.

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Weight

More treatments

Clinician-prescribed care beyond peptides: hormone therapy, weight management, sexual health, skin, hair, energy, and more. Reviewed and prescribed by US-licensed clinicians. Explore any treatment for the full picture.

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Men’s hormone health

Testosterone Replacement Therapy (TRT)

A lab-based testosterone program for men, reviewed by a licensed clinician and prescribed only when your labs and history support it. Compounded in the USA by licensed 503A pharmacies.

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Women’s hormone health

Hormone Replacement Therapy (HRT)

Personalized hormone therapy for women, guided by your labs and symptom history, reviewed by a licensed clinician. Prescribed only when appropriate, and compounded in the USA.

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Weight management

Oral Semaglutide

Compounded oral semaglutide for weight management, no injections. A licensed clinician reviews your eligibility and prescribes only when it fits your history.

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Weight management

Oral Tirzepatide

Compounded oral tirzepatide, a dual-incretin therapy for weight management, no injections. A licensed clinician reviews your eligibility and prescribes only when it fits your history.

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Longevity

Glutathione

The body’s master antioxidant, for oxidative-stress, detoxification, and cellular-health support. Compounded in the USA, clinician-prescribed.

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Sexual health

PT-141 (Bremelanotide)

A compounded peptide that acts on the brain’s desire pathway, for men and women, evaluated and prescribed by a licensed clinician.

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Skin & hair

GHK-Cu Copper Peptide Cream

A topical copper tripeptide cream studied for the look of skin firmness, tone, texture, and fine lines, plus scalp support. Compounded in the USA by licensed 503A pharmacies and prescribed by a clinician.

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Whole-body wellness

Low-Dose Naltrexone (LDN)

Naltrexone at a low dose, prescribed off-label by a US-licensed clinician as part of a whole-body wellness approach. Compounded in the USA by licensed 503A pharmacies, prescribed only when appropriate.

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Men’s sexual health

Sildenafil

The on-demand ED tablet, taken as needed before activity, prescribed by a licensed clinician after a private review. FDA-approved generic or 503A-compounded options, shipped discreetly.

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Men’s sexual health

Tadalafil

The long-acting ED tablet, taken daily or as needed, prescribed by a licensed clinician after a private review. FDA-approved generic or 503A-compounded options, shipped discreetly.

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Hair loss

Hair Loss

Clinician-prescribed treatment for thinning hair and pattern hair loss, using FDA-approved finasteride and minoxidil or 503A-compounded combination formulas.

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Energy & wellness

B12 & Energy Injections

Clinician-reviewed vitamin B12 injections for everyday energy and metabolism support. Methylcobalamin compounded in the USA; cyanocobalamin available as an FDA-approved commercial form.

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Men’s hormone health

Enclomiphene

An oral, lab-based therapy that works with the body’s own hormone signaling to support testosterone, prescribed by a US-licensed clinician only when appropriate. Compounded in the USA by licensed 503A pharmacies.

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Research

Peptides currently classified FDA Category 2 — cannot be legally compounded by US pharmacies today. Read the research below. For clinician-led peptide care in these areas, our programs route you to legally available alternatives.

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Cat 2 · Educational

BPC-157

Synthetic peptide derived from human gastric juice. Studied for recovery and tissue repair.

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Recovery
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Cat 2 · Educational

TB-500

Fragment of thymosin beta-4. Studied for tissue repair and flexibility.

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Recovery
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Cat 2 · Educational

Thymosin Alpha-1

Thymus-derived peptide with immune-modulating properties.

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Immune
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Cat 2 · Educational

Selank

Synthetic analog of the immune peptide tuftsin. Studied for cognitive and anxiolytic effects.

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Cognitive
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Cat 2 · Educational

Semax

Synthetic ACTH fragment researched for neuroprotective effects and focus.

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Focus
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Cat 2 · Educational

AOD-9604

C-terminal fragment of human growth hormone (HGH 177-191). Studied for fat-metabolism and lipolytic effects.

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Metabolism
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Cat 2 · Educational

CJC-1295

Long-acting growth-hormone-releasing hormone (GHRH) analog. Studied alongside ghrelin-receptor peptides.

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Growth Hormone
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Cat 2 · Educational

Cathelicidin LL-37

The sole human cathelicidin. Studied for antimicrobial action and immunomodulation.

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Immune
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Cat 2 · Educational

Dihexa

Angiotensin IV analog. Studied in preclinical models for HGF/c-Met signaling and neurogenesis.

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Cognitive
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Cat 2 · Educational

Emideltide

Research-stage peptide examined in relation to delta-sleep peptide research.

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Sleep
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Cat 2 · Educational

Epitalon

Khavinson tetrapeptide (Ala-Glu-Asp-Gly). Studied for telomerase activity and pineal regulation.

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Longevity
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Cat 2 · Educational

GHK-Cu

Copper tripeptide-1. Studied for wound healing, skin, and hair.

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Skin
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Cat 2 · Educational

Ipamorelin

Selective ghrelin-receptor agonist and growth-hormone-releasing peptide. Studied for GH-pathway selectivity.

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Growth Hormone
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Cat 2 · Educational

KPV

C-terminal tripeptide of alpha-MSH (Lys-Pro-Val). Studied for anti-inflammatory activity via the melanocortin pathway.

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Anti-inflammatory
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Cat 2 · Educational

Melanotan II

Alpha-MSH analog. Studied for melanocortin-receptor activity and pigmentation.

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Skin
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Cat 2 · Educational

MOTs-c

Mitochondrial-derived peptide. Studied for AMPK activation, insulin sensitivity, and exercise-mimetic effects.

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Metabolism
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Cat 2 · Educational

PEG-MGF

Pegylated mechano growth factor (IGF-1Ec splice variant). Studied for satellite-cell activation and muscle repair.

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Muscle

Guides

No-jargon primers for readers who want to understand peptides first.

The complete index

Every guide and article in the library on one page, grouped by topic.

Browse all guides

Ready when you are

Read enough? Find the right protocol for your goals.

Take a 3-minute assessment and a licensed clinician will recommend the right protocol for you — compounded in the USA by licensed 503A pharmacies.