Lyophilized vial
Retatrutide
Triple-agonist peptide studied at the GLP-1, GIP and glucagon receptors.
$105.00
Research peptides · Made to be verified
Peptides only. Proof included.
68 research compounds, each independently tested and shipped with a lot-matched certificate of analysis. Nothing else on the shelf, nothing hidden in the paperwork.
Buy 2, Get 1 freeFree shipping over $300
99%+HPLC purity target per lot
100%Lots independently tested
5Checks before release
1 dayDispatch on in-stock orders
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Most ordered
Retatrutide
Triple-agonist peptide studied at the GLP-1, GIP and glucagon receptors.
from $105.00
5 sizes · Buy 2, get 1 free
Independently testedThird-party lab, every lot
COA on every lotMatched to the vial you receive
Fast dispatchSame day before the cutoff
Secure checkoutEncrypted end to end
Discreet packagingPlain outer box
The catalog
Every compound, one shelf
Grouped by type. Pick a size on the card or open a product for full specs and certificates.
GLP Research5Peptides31Blends6Bioregulators7Liquid Sprays4Dissolving Strips3Research Stacks11Supplies1
GLP Research
Incretin and amylin-pathway research compounds.
Lyophilized vial
Semaglutide
Long-acting GLP-1 receptor agonist analogue for metabolic pathway studies.
$60.00
Lyophilized vial
Tirzepatide
Dual GIP / GLP-1 receptor agonist for incretin-signalling research.
$100.00
Lyophilized vial
Retatrutide + Cagrilintide
Pre-combined triple agonist and amylin analogue in a single vial.
$200.00
Peptides
Single-compound lyophilised research peptides.
Lyophilized vial
DSIP
Delta sleep-inducing peptide for circadian and sleep-architecture studies.
$55.00
Lyophilized vial
Thymosin Alpha-1
Thymic peptide studied in T-cell and immune-modulation research.
$125.00
Blends
Pre-combined multi-peptide research vials.
Lyophilized vial
Tesamorelin + Ipamorelin
GHRH analogue and selective secretagogue in a single vial.
$140.00
Bioregulators
Short-chain peptide bioregulators.
Liquid Sprays
Ready-to-use liquid research formats.
Dissolving Strips
Measured-dose dissolving strip formats.
Dissolving strips
Focus Blend Strips
Cognitive-research blend in dissolving strips, 30 per pack.
$40.00
Research Stacks
Curated multi-vial stacks at a set discount.
3-VIAL STACK
Focus Stack
Semax, Selank and Pinealon for cognitive research.
- Semax10 mg
- Selank10 mg
- Pinealon20 mg
$171.00$190.00
3-VIAL STACK
GH Axis Stack
Three secretagogue mechanisms for pituitary research.
- CJC-1295 + Ipamorelin10 / 10 mg
- Sermorelin5 mg
- Ipamorelin5 mg
$225.00$250.00
3-VIAL STACK
Immune Stack
Thymic and mitochondrial peptides for immune research.
- Thymosin Alpha-110 mg
- Thymalin20 mg
- MOTS-c10 mg
$265.50$295.00
3-VIAL STACK
Lift Stack
Retatrutide, GHK-Cu and Melanotan-1 in one order.
- Retatrutide10 mg
- GHK-Cu50 mg
- Melanotan-110 mg
$189.00$210.00
3-VIAL STACK
Metabolic Stack
Tirzepatide, AOD-9604 and Tesamorelin for metabolic research.
- Tirzepatide10 mg
- AOD-96045 mg
- Tesamorelin10 mg
$252.00$280.00
3-VIAL STACK
Mito Stack
NAD+, MOTS-c and SS-31 for mitochondrial research.
- NAD+1000 mg
- MOTS-c10 mg
- SS-3110 mg
$342.00$380.00
3-VIAL STACK
Radiance Stack
GLOW Blend, GHK-Cu and KPV for skin-matrix research.
- GLOW Blend70 mg
- GHK-Cu100 mg
- KPV10 mg
$256.50$285.00
3-VIAL STACK
Rebuild Stack
BPC-157, TB-500 and Ipamorelin in one order.
- BPC-1575 mg
- TB-50010 mg
- Ipamorelin5 mg
$180.00$200.00
4-VIAL STACK
Recovery Four
Four vials spanning GH-axis and repair research.
- CJC-1295 + Ipamorelin10 / 10 mg
- TB-50010 mg
- BPC-1575 mg
- Ipamorelin5 mg
$315.00$350.00
3-VIAL STACK
Repair Stack
Wolverine Blend, KPV and GHK-Cu for tissue-repair research.
- Wolverine Blend20 mg
- KPV10 mg
- GHK-Cu50 mg
$274.50$305.00
3-VIAL STACK
Vitality Stack
Immune, energy and mitochondrial compounds together.
- Thymosin Alpha-110 mg
- NAD+500 mg
- MOTS-c10 mg
$292.50$325.00
Supplies
Reconstitution and lab essentials.
Supply
Reconstitution Solution
30 mL bacteriostatic water for reconstituting lyophilised peptides.
$25.00
Don't take our word for it
Every vial has a paper trail.
Match the lot number on your label to its certificate in seconds.
Beyond purity
A purity number is only the start
HPLC tells you how much of the vial is the target peptide. It can't see these four things, so we test for them separately.
01
Endotoxin
Cell-wall debris left by bacteria during manufacture.
- What HPLC misses
- HPLC reads molecular purity. Endotoxin is biological, so a vial can pass HPLC and still carry it.
- Why it matters
- Even trace endotoxin provokes an inflammatory response in cell and tissue models, which skews results before an experiment starts.
02
Sterility
Whether anything is alive in the vial.
- What HPLC misses
- A clean chromatogram says nothing about bacteria, yeast or mould. That takes a culture test.
- Why it matters
- Microbial growth adds an uncontrolled variable to every assay the vial touches.
03
Heavy metals
Lead, arsenic, cadmium and mercury carried over from reagents.
- What HPLC misses
- Metals are inorganic and invisible to HPLC and mass spec. They need a separate ICP-MS run.
- Why it matters
- Metals interfere with enzymes and accumulate over long studies, confounding the data.
04
Lot consistency
Whether this lot behaves like the last one.
- What HPLC misses
- One vial per run is the usual spot-check. It cannot show drift between lots.
- Why it matters
- If the material drifts between orders, so do your results. Reproducibility depends on it.
Shop by research area
Start from the pathway
01
MetabolicEnergy balance, incretin and lipid pathways.
9 →02Recovery & RepairTissue repair, migration and inflammation.
8 →03GH AxisSecretagogues and GHRH analogues.
9 →04LongevityMitochondria, NAD+ and cellular ageing.
11 →05CognitiveNeurotrophic and anxiolytic research.
13 →06Skin & PigmentCollagen, copper peptides and melanocortins.
7 →07ImmuneThymic peptides and immune modulation.
4 →08SleepCircadian and sleep-architecture research.
2 →09HormonalHPG-axis and central signalling.
4 →Bestsellers
Shop everything What researchers reorder
Lyophilized vial
Retatrutide
Triple-agonist peptide studied at the GLP-1, GIP and glucagon receptors.
$105.00
Lyophilized vial
Semaglutide
Long-acting GLP-1 receptor agonist analogue for metabolic pathway studies.
$60.00
Lyophilized vial
Tirzepatide
Dual GIP / GLP-1 receptor agonist for incretin-signalling research.
$100.00
Why Peptides Only
Six things we won't compromise on
01
COA
Documents you can check
Every lot has its own certificate, matched by lot number to the vial in your box.
02
1 : 1
Fill accuracy
Net content is confirmed against the label claim before a lot is released.
03
3 = 2
Buy 2, get 1 free
Add any three eligible vials and the lowest-priced one is free, automatically.
04
$300
Free-shipping threshold
Orders over $300 ship free. Everything is dispatched in plain packaging.
05
−20°C
Cold-chain storage
Lyophilized stock is held frozen and packed to order.
06
24 h
Support response
Real people answer order and documentation questions within one business day.
The testing standard
5 checks before a lot is released
A lot ships only after every check passes. The results go on its certificate.
01Identity
Mass spectrometry confirms the molecule is what the label says.
02Purity
HPLC measures the share of the target peptide in the lot.
03Endotoxin
LAL testing screens for bacterial endotoxin.
04Sterility
Culture testing checks for microbial growth.
05Heavy metals
ICP-MS screens for lead, arsenic, cadmium and mercury.
Research stacks
All stacks Curated stacks, 10% under the vial price
3-VIAL STACK
Focus Stack
Semax, Selank and Pinealon for cognitive research.
- Semax10 mg
- Selank10 mg
- Pinealon20 mg
$171.00$190.00
3-VIAL STACK
GH Axis Stack
Three secretagogue mechanisms for pituitary research.
- CJC-1295 + Ipamorelin10 / 10 mg
- Sermorelin5 mg
- Ipamorelin5 mg
$225.00$250.00
3-VIAL STACK
Immune Stack
Thymic and mitochondrial peptides for immune research.
- Thymosin Alpha-110 mg
- Thymalin20 mg
- MOTS-c10 mg
$265.50$295.00
COA library
Full library & lot lookup Certificates for every compound
Retatrutide5 sizes
10 mg · PO-RETATRUTIDE-10Certificate being uploaded
20 mg · PO-RETATRUTIDE-20Certificate being uploaded
30 mg · PO-RETATRUTIDE-30Certificate being uploaded
48 mg · PO-RETATRUTIDE-48Certificate being uploaded
60 mg · PO-RETATRUTIDE-60Certificate being uploaded
Semaglutide5 sizes
5 mg · PO-SEMAGLUTIDE-5Certificate being uploaded
10 mg · PO-SEMAGLUTIDE-10Certificate being uploaded
20 mg · PO-SEMAGLUTIDE-20Certificate being uploaded
30 mg · PO-SEMAGLUTIDE-30Certificate being uploaded
50 mg · PO-SEMAGLUTIDE-50Certificate being uploaded
Tirzepatide5 sizes
10 mg · PO-TIRZEPATIDE-10Certificate being uploaded
20 mg · PO-TIRZEPATIDE-20Certificate being uploaded
30 mg · PO-TIRZEPATIDE-30Certificate being uploaded
60 mg · PO-TIRZEPATIDE-60Certificate being uploaded
100 mg · PO-TIRZEPATIDE-100Certificate being uploaded
Cagrilintide1 size
10 mg · PO-CAGRILINTIDE-10Certificate being uploaded
Retatrutide + Cagrilintide1 size
12.5 / 2.5 mg · PO-RETATRUTIDEC-12525Certificate being uploaded
BPC-1573 sizes
5 mg · PO-BPC157-5Certificate being uploaded
10 mg · PO-BPC157-10Certificate being uploaded
15 mg · PO-BPC157-15Certificate being uploaded
GHK-Cu2 sizes
50 mg · PO-GHKCU-50Certificate being uploaded
100 mg · PO-GHKCU-100Certificate being uploaded
NAD+2 sizes
500 mg · PO-NAD-500Certificate being uploaded
1000 mg · PO-NAD-1000Certificate being uploaded
One focus
Peptides only. No supplements, no side lines — just research compounds, documented properly.
Straight pricing
The price on the page is the price. Deals apply automatically in the cart.
Built for repeat orders
Your account keeps every order and certificate, so reordering takes a minute.
FAQ
Questions, answered
Who can buy from Peptides Only?
Our products are sold only to qualified researchers aged 21 or over, for laboratory research. They are not for human or veterinary use, and we do not provide usage or dosing guidance.
How does Buy 2, Get 1 Free work?
Add any three eligible vials — they can be different products — and the lowest-priced one is free. Six vials get two free, and so on. The discount is applied automatically at checkout.
Where do I find the COA for my vial?
Every product page links to its certificates, and the COA library lists them all. Each certificate carries a lot number that matches the label on your vial.
How fast do orders ship?
In-stock orders placed before the daily cutoff are dispatched the same business day. Shipping options and delivery estimates are shown at checkout, and orders over $300 ship free.
How should vials be stored?
Keep lyophilized vials frozen or refrigerated, away from light and moisture. Storage details for each compound are on its product page and certificate.
Can I return an order?
Because of their nature, research compounds cannot be returned once shipped. If an order arrives damaged or incorrect, contact us within 72 hours of delivery and we will make it right.
Do you offer wholesale or lab pricing?
Yes. Institutions and labs ordering in volume can apply for wholesale terms on the wholesale page.