A peptide is a chain of 2 to 50 amino acids linked by peptide bonds. Shorter than a protein but larger than a free amino acid, peptides act as signaling molecules that tell cells how to heal, build, regulate, and defend.

How do peptides work in the body?

Peptides bind to specific receptors on cell surfaces. When they dock, they trigger a signal cascade inside the cell that changes gene expression, enzyme activity, or hormone release — like a key that fits only one lock.

What is the difference between a peptide and a protein?

Peptides are short chains of 2–50 amino acids. Proteins are larger — typically 50 or more amino acids folded into complex 3D structures. Peptides are small enough to slip into signaling pathways with high specificity.

Are therapeutic peptides natural?

Therapeutic peptides are synthesized in licensed compounding pharmacies as precise copies or analogues of peptides your body already makes — like insulin, oxytocin, or growth hormone-releasing hormone.

The Science · Visualized

You are written
in peptides.

Short chains of amino acids — the smallest units of biological language. Every instruction your cells follow begins as a peptide message.

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The Definition

Between an amino acid
and a protein.

A peptide is a chain of 2 to 50 amino acids linked by peptide bonds. Shorter than a protein, larger than a free amino acid — small enough to slip into the body's signaling system, specific enough to target a single receptor.

Your body already makes thousands of them. Insulin, oxytocin, glucagon, endorphins — all peptides. Therapeutic peptides are precise copies or cousins of these natural messengers.

Amino Acid

1 unit

Peptide

2–50 units

Protein

50+ units

How They Work

A key that fits
only one lock.

Each peptide is shaped to dock with a specific receptor on the cell surface. When it binds, a signal cascade fires inside — changing gene expression, enzyme activity, or hormone release.

Simplified illustration of GPCR-style peptide signaling.

Four Jobs

What peptides do
inside you.

Every therapeutic peptide falls into one of four biological missions. Understand these, and the whole category makes sense.

HEAL

Tissue repair, angiogenesis, wound closure

Repair peptides like BPC-157 and TB-500 accelerate new blood vessel formation and guide fibroblast migration — the foundation of how the body rebuilds itself.

BUILD

Growth hormone, collagen, muscle

GHRH analogues and ghrelin mimetics instruct the pituitary to pulse natural growth hormone — driving lean tissue, recovery, and collagen synthesis.

REGULATE

Metabolism, hormones, circadian rhythm

Peptides act as master dials on insulin sensitivity, melatonin, fertility, and stress response — fine-tuning the systems that drift as we age.

DEFEND

Immune modulation, inflammation control

From Thymosin Alpha-1 to VIP, peptides orchestrate T-cell function, NK cell activation, and the inflammatory cascades that keep you well.

Choose Your Path

Which peptide fits?

Every therapeutic peptide maps to a specific goal. Follow the tree to the right entry point — then dig into the evidence on each treatment page.

What's your goal?

Pick one to begin

Fat Loss

Body composition

Visceral Fat

Belly / liver

Subcutaneous

Stubborn areas

Recovery

Tissue repair

BPC-157

Localized healing

TB-500

Systemic repair

Longevity

Cellular health

Epitalon

Telomeres

MOTS-C

Mitochondria

Cognition

Focus + calm

Semax

Nootropic

Selank

Anxiolytic

Natural vs Therapeutic

Same molecule. Different origin.

Naturally Made

Your body's own library.

Insulin, oxytocin, glucagon, growth hormone-releasing hormone, endorphins. Your body produces thousands of peptides every second, each one a precise instruction for a specific cellular behaviour.

Compounded

Pharmaceutical-grade copies.

Therapeutic peptides are synthesized in licensed compounding pharmacies under strict sterile conditions. Same amino acid sequence. Same receptor affinity. Delivered cold-chain so the structure stays intact.

The Kamura Score

Not every peptide
is worth using.

The peptide category is flooded with marketing claims, grey-market sourcing, and under-powered studies. Kamura rates every peptide on a transparent 0–100 composite — so you can tell the breakthroughs from the hype.

Read the Methodology

Clinical Evidence

Safety Profile

Accessibility

Value

Ready to Explore

See every peptide,
scored and ranked.

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You are writtenin peptides.

Between an amino acidand a protein.

A key that fitsonly one lock.

What peptides doinside you.