Touchstone Peptides
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The standard is TouchstoneUS lab · US stock · ships from the US

Short chains. Long paper trail.

Anyone can print a certificate, and in this market the batch numbers on them get rewritten a tier upstream. So we name the lab that made it, send a sample from your lot to a second independent laboratory at our cost, and put every price on the page.

See the catalog and pricesHow we test

For laboratory research use only. Not for human or veterinary use, and not sold for it.

100%lots tested twiceA second independent assay on every lot, cost already in the price
Everylot documentedA certificate of analysis with every lot, kept after it is superseded
3 pmsame-day cutoffOrder before three and it leaves the same day
$0to see a priceNo account, no quote form, no code to hunt for
01Why this class of molecule

Big enough to be specific. Small enough to be made.

Peptides sit in a useful gap. Small molecules are blunt and proteins are hard to define. A chain of a few dozen amino acids can be specified exactly, synthesised to a known purity, and still bind one target and not its neighbors.

They are selective

A short chain can bind one receptor tightly and leave the related ones alone. That is why peptides are useful as research tools: they let you ask a narrow question and get a narrow answer.

They are the body's own language

Signalling between cells already runs on peptides. Insulin is one. Oxytocin is one. Studying a peptide is studying a message the system already understands rather than something foreign to it.

They are small enough to make

A protein has to be expressed in a living system. A peptide can be built residue by residue on a resin, which means a defined sequence, a defined purity, and a molecule you can actually characterize.

The literature is deep

Receptor pharmacology, metabolism, matrix and tissue biology, immunology, antimicrobials, cosmetic science. Decades of published work, and several approved drugs, sit behind this class of molecule.

What any specific compound does is a question for the published literature and, where a person is involved, for a doctor. Nothing here is sold for use in people and nothing on this page is medical advice.

02Most requested

The four that move fastest.

Molecular weight, measured net peptide content, purity and the lot number are printed on the vial rather than buried in an email attachment. If it is on the label it is on the certificate, and both came from the same lot.

03Provenance

A certificate is a claim. A named facility is a fact.

The weak point in this supply chain is not the paperwork, it is the tier above the paperwork. Certificates inherit whatever the previous handler wrote down. So the record we publish starts at the manufacturer and never gets reset on the way to you.

If a facility we buy from appears on an import alert, we stop buying from it and say so on the affected product pages rather than selling through the remaining inventory quietly.

Lot record · what travels with every order
Manufacturer
Original batch, not relabeled downstream
Facility registration
FDA establishment number, shown
Import alert screening
Every facility checked against IA 66-80 before we buy
Batch record
Original manufacturer batch, not relabeled
Date of manufacture
As recorded at source, never reset
Retest date
From the manufacturer, not from our receipt
Independent assay
Second lab, sample drawn from your lot
Chain of custody
Manufacturer to our freezer to your dock

Demo build. The structure is the product; the entries here are illustrative.

04Sets

Grouped by chemistry, not by promises.

Twelve sets, each built around something the vials in it actually share: what they are aimed at, how hard they are to make, or simply being the things people order together. Every vial arrives with its own lot number and its own certificate, so a set is a way to buy three at once and never a way to buy three under one piece of paper.

A metabolic line, a copper peptide and a linear melanocortin in one box. Three different syntheses and three separate certificates, which is the point of buying a set rather than three vials of the same thing.

  • Retatrutide10 mg39 res
  • GHK-Cu50 mg3 res
  • Melanotan I10 mg13 res

Set price

$170

$210 bought separately

You keep $40.00

Every vial in a set ships with its own lot record and both assay reports. Sets are a packing convenience, not a protocol.

05Catalog

58 lines in stock. Every price, in the open.

Grouped by what the thing is, priced by the vial, with the price on the card rather than behind an account. Open any line for its full specification, its other sizes and its certificate. Molecular formula, weight and CAS number for every one come from PubChem, and the record number is kept so you can check them against the source yourself.

Price per unit
Availability

58 of 58

GLP-1 and metabolic4

Hormones6

Research peptides20

Research peptidesIn stock

Glutathione

GSH
$75.00600 mg · $0.13/mg2 sizes

Peptide blends8

Bioregulators7

BioregulatorsIn stock

Vilon

Lys-Glu
$60.0020 mg · $3.00/mg

Cosmetic peptides2

Research compounds2

Liquid sprays4

Dissolving strips3

Lab supplies2

06Quality

Two laboratories, one lot number.

The manufacturer runs its release testing and we run our own, on material drawn from the lot that ships to you. Both reports carry the same lot number. Buyers in this market currently pay around three hundred and sixty dollars a time to do that themselves; here it is already in the unit price.

HPLC · 214 nm

0.00%peak area purity

05101520retention time (min)mAU12.60 min

Every lot ships with this trace, the mass spec, and the water content. The certificate of analysis is on the product page before you buy, not after you ask.

08How it is made

Five steps between an amino acid and a sealed vial.

Worth understanding, because it explains the price. A four-residue peptide and a forty-four-residue peptide are not the same product with a different label.

01Built one residue at a time
  1. 01

    Built one residue at a time

    Solid-phase synthesis. The chain is anchored to a resin bead and grown from the C-terminus up, one amino acid per cycle, each one coupled, capped and washed. A forty-residue peptide is forty of those cycles, which is most of why it costs what it does.

  2. 02

    Cleaved off the resin

    Acid takes the finished chain off the bead and strips the side-chain protecting groups at the same time. What drops out is crude: the peptide you wanted, plus the ones that missed a coupling somewhere along the way.

  3. 03

    Purified until it is one peak

    Preparative reversed-phase HPLC pulls the product away from the deletion sequences and truncations. Fractions get cut and re-run until an analytical injection comes back as a single dominant peak.

  4. 04

    Assayed twice, by two labs

    The manufacturer runs its own release testing. We draw a second sample from the lot that arrives here and send it to an independent laboratory. Both reports carry the same lot number, and both travel with your order.

  5. 05

    Lyophilized and shipped cold

    Freeze-dried under vacuum into vials, sealed with desiccant, packed with gel packs in an insulated mailer. Tracking goes out before the courier scans it.

09Ordering

Three steps, and none of them is an email thread.

01

Pick a quantity

The whole catalog reprices at the top of the table. No account, no code, no quote form standing between you and a number.

02

Check the paperwork

Open the row. Sequence, formula, molecular weight, current lot, purity, net peptide content, both assay reports. Before you pay, not after.

03

It ships the same day

Order a stocked lot before three in the afternoon and it leaves that day, cold-packed, tracked, with the documents in the box.

And the four things you are actually about to ask.

Dispatch, shipping, what happens when something arrives wrong, and who gets a discount. Written out in sentences rather than stamped on as badges, because a badge that says secure payment tells you nothing you had not already assumed.

  • 01

    Out the door by 3pm ET

    Order before the cutoff on a working day and it ships the same day, with the tracking number emailed when the label is made, not when it moves.

  • 02

    Free shipping over $99

    Flat rate below it, shown in the basket before you enter a card. No handling fee appears at the last step.

  • 03

    60 days to change your mind

    Wrong or damaged, tell us inside 72 hours with a photo and the replacement ships at our cost. Otherwise you have 60 days for a full refund. Unopened vials, any reason, no restocking fee.

  • 04

    20% for military and first responders

    Serving, retired, fire, police and EMS. Verified once, then it applies to every order without a code to remember.

10Where this goes

A supplier you can audit, not one you have to trust.

Trust is what you fall back on when there is nothing to check. The whole direction of this company is to leave less and less to trust: more of the record published, more of it verifiable by someone who has never spoken to us.

The bench

Characterized, not assumed

Two independent assays on every lot, and the raw chromatogram published rather than a number retyped into a template.

The cold chain

Minus twenty, end to end

Freezer to insulated mailer to your door, with the tracking issued before the courier scans the label.

The record

A lot number that leads somewhere

Every lot we have released has its own certificate at its own address, superseded ones included, so a vial already in a freezer can still be checked.

The road ahead

The signed paper itself

The searchable archive of every lot is built and open above. What is still to come is the signed report behind each row, and the testing laboratory’s own number, so you can check a lot without going through us.

11Against the rest

Same molecules. Very different paperwork.

The complaints in this market are always the same four: the certificate belongs to another batch, the vial is short, the lot number leads nowhere, and checking it yourself costs more than the peptide did. Each row below is one of those, answered.

TouchstoneWhat this category currently does
The lab that made it is named on the lot recordThe seller is the only name you ever see
Batch number, manufacture date and retest date come from sourceFDA has documented all three being rewritten downstream
A second independent lab assays every lot, cost includedYou pay around $360 a time to check your own order
Reports carry the lot number printed on your vialCertificates recycled from somebody else's batch
Net peptide content measured and published per lotA label weight, and you find out later it was short
Every price visible without an accountQuote forms, codes, and a different price every week
Card, bank transfer, refunds, a real returns policyCrypto pushed hard, and no recourse when it goes wrong

Right-hand column from a September 2026 review of FDA warning letters and enforcement actions in this category, and of buyer complaint threads about certificates, dosing accuracy and payment.

12Where the line is

The list of things we will not sell you.

Every supplier the FDA wrote to this year crossed the same line: they sold research material to anybody, next to the kit for injecting it. We would rather lose those orders than build on them, and saying so up front is the only version of this that means anything.

  • We do not sell syringes, needles, prep pads, or anything else whose only use is an injection.
  • We do not give dosing, protocol or administration guidance, in writing or on the phone.
  • We do not claim that anything here treats, prevents or improves any condition, because none of it is approved to.
  • We do not run influencer codes, stacked discounts, or a countdown that resets every morning.
  • We do not take crypto, because a buyer with no recourse is a buyer with no protection.

Ask us something

A real person answers, the same day.

A question about a lot, a line we do not stock, or a sequence you want made. You get a written answer from someone whose name is on the email, not a ticket number and a template.

  • No account needed to order
  • Custom sequences quoted the same day
  • Cold-pack shipping on every order
  • Refunds if a lot fails its own spec

Demo build. This form does not send anything.

Questions

The things buyers ask before the first order.

Do I need an account to order?

No. Every price is visible without one, and you can check out without creating anything. An account only exists so you can see past orders, re-order a line you liked, and pull the certificate for a lot you bought two years ago.

Why does naming the manufacturer matter more than showing a certificate?

Because a certificate can be copied and a batch number can be typed. In May 2026 the FDA cited an upstream supplier for relabelling material under a new batch number and changing both the manufacturing date and the retest date without supporting data. A certificate inherits whatever the tier above it claimed. A named, registered facility can be checked independently.

What does the independent assay cover?

Identity by mass spectrometry, purity by reversed-phase HPLC peak area, and net peptide content. The sample is drawn from the lot that ships to you, the report carries that lot number, and the cost is already in the unit price rather than pushed onto you afterwards.

How is purity measured?

Reversed-phase HPLC at 214 nanometers, where the peptide bond absorbs. Purity is reported as product peak area over total peak area. The method and the gradient are published with the report so another laboratory can reproduce the run.

Can you synthesise something that is not in the catalog?

Yes. Send the sequence and the scale and a written price and lead time comes back the same business day. Routine modifications include N-terminal acetylation, C-terminal amidation, biotinylation, FITC labelling, disulfide bridges and PEGylation. Research-grade custom work is quoted at a stated purity, and if a difficult sequence cannot be made to that specification you are told inside two weeks rather than strung along.

What are the minimum quantities?

Ten milligrams on catalog lines. Larger quantities cost less per milligram and the ladder is printed on every product row, so you can see where the next break falls before you buy.

How is material shipped and stored?

Lyophilized powder in sealed vials with desiccant, packed with gel packs in insulated mailers, domestic overnight or two-day. Store at minus twenty degrees Celsius, desiccated and out of light. Unopened vials are stable for twenty-four months from the manufacturer retest date.

Do you ship internationally?

To most of Europe, Canada, Australia and Japan. You are the importer of record and responsible for your own customs clearance. The commercial invoice, safety data sheet and both assay reports travel with the shipment.