Shop Research Peptides and Laboratory Supplies

The Peptide Works shop is organised around two questions researchers actually ask: which compound do I need, and in which presentation do I need it. Those are different questions, and a catalogue that only answers one of them makes the other harder than it should be.

So the shop can be approached from either direction. If you know the compound, the alphabetical index further down this page takes you straight to it. If you know the format — a lyophilised vial, a capsule presentation, a pre-blended solution, a bundled stack — the category routes take you to everything available in that form. Most researchers use both across a single order: the compound index for the specific sequence a protocol calls for, and the category view when they are restocking or comparing what a compound is available in.

Alongside the main compound catalogue there are three routes worth knowing about. New arrivals collects compounds recently added to the range, which is the fastest way to see what has been listed since your last order. Promotions collects whatever is currently discounted. And the accessories category holds the consumables that a peptide order is usually incomplete without — bacteriostatic water, sterile water, syringes, pen devices, wipes and sharps disposal.

Product listings carry the current price and the available quantity or concentration options. Where a compound is offered in more than one size, the listing shows a price range and the specific options are selected on the product page itself. Prices are shown in the currency you have selected, and the store supports GBP, USD, EUR and CAD.

Everything in the catalogue, in every category and every format, is supplied for laboratory research and development purposes only. That is not a footnote to the shop; it is the basis on which the entire catalogue exists.

The vial is the standard presentation for research peptides and it accounts for the largest part of the Peptide Works catalogue. Each vial contains freeze-dried peptide powder under seal, to be reconstituted in the laboratory with bacteriostatic or sterile water before use.

Lyophilisation is why this format dominates. Removing water from the material removes the medium in which most degradation chemistry happens — hydrolysis, deamidation and the slow structural changes that turn a well-characterised compound into a mixture. A correctly lyophilised peptide, sealed and stored properly, remains intact far longer than the same compound in solution. For a laboratory ordering ahead of a study or holding a working inventory, that difference is the whole argument for the format.

The second argument is control. A vial imposes nothing on your protocol. You choose the solvent, the volume and therefore the concentration, and you prepare it at the point of use. For groups with established reconstitution procedures — and for any work where the concentration needs to be set precisely rather than accepted — that flexibility is not a convenience, it is a requirement.

Where a compound is offered in more than one quantity, the options appear on the product page and the catalogue listing shows the range. Selecting the size you need is done at the product level rather than in the shop view.

What the vial range covers

The vial catalogue spans the breadth of current peptide research rather than concentrating on a handful of high-volume sellers. Tissue repair and recovery compounds are well represented, with BPC-157 and TB500 among the most frequently ordered products in the entire range. The growth hormone secretagogue group is one of the largest sub-categories, covering CJC-1295 in both its DAC and no-DAC formulations, Ipamorelin, GHRP-2, GHRP-6, Hexarelin, Sermorelin and Tesamorelin, alongside AOD-9604 and the growth factor compounds IGF-1 LR3, MGF and PEG-MGF. Myostatin pathway research is served by Follistatin 344, GDF-8 and ACE-031.

Melanocortin and reproductive research compounds include Melanotan 1, Melanotan 2, PT-141, Kisspeptin, Oxytocin, Gonadorelin, HMG and Triptorelin. The neuropeptide group covers Selank, Semax, DSIP, Adamax, P-21 and Orexin A. Longevity, immune and bioregulator research is supported by Epithalon, Thymalin, Thymosin Alpha-1 and the short-chain bioregulators Bronchogen, Cartalax, Pinealon and Vilon.

The remainder of the vial range covers antimicrobial, anti-inflammatory, mitochondrial and metabolic research: KPV, LL-37, VIP, GHK-Cu, SNAP-8, FOXO4-DRI, PNC-27, MOTS-c Peptide, Humanin, SS-31, Adipotide, AICAR, AMPK, ARA-290, B7-33, PTD-DBM, Protirelin TRH, L-Glutathione and NAD+.

That long tail is maintained deliberately. A catalogue that stocks only the twenty best-selling compounds is one a research group will always have to supplement elsewhere, which means a second lead time, a second packing standard and a second set of documentation in a different format for every order.

A blend is a finished product in which two or more peptides are combined in a single preparation at known concentrations. It is not a bundle; it is one item containing more than one compound.

Blends exist because a great deal of peptide research is comparative or combinational rather than single-compound. When published work has examined two sequences together often enough that a research group wants to reproduce or extend it, preparing that combination independently introduces a variable nobody wanted: the accuracy of the combination itself. Two compounds measured, dissolved and mixed in the laboratory are two opportunities for a preparation error, and those errors are silent — they do not announce themselves, they simply widen the spread of the results.

A pre-formulated blend removes that step. The proportions are fixed at production, the material is documented as supplied, and the concentration of each component is known rather than calculated from what you intended to weigh out.

The blends in the catalogue reflect combinations that appear together in the research literature rather than arbitrary pairings. Tissue repair research is the most represented, with BPC-157 and TB500 supplied as a combined vial. Growth hormone research accounts for much of the rest, where a secretagogue paired with a releasing-hormone analogue is the standard experimental arrangement rather than an unusual one.

Each component within a blend is held to the same analytical standard as the equivalent single compound, and the documentation records each component rather than treating the blend as a single undifferentiated item. A blend whose certificate only characterises the mixture tells you considerably less than one that characterises what went into it.

A stack is a set of individual products supplied together as one purchase. The distinction from a blend matters, and it is worth being precise about because the two are frequently confused.

In a blend, the compounds are already combined and the ratio is fixed. In a stack, each compound arrives as its own item, sealed and documented separately. You decide how each is prepared, at what concentration, and whether they are used together, sequentially or independently. The stack consolidates the ordering, not the chemistry.

That distinction determines which one a given piece of work needs. If a protocol requires a fixed, reproducible combination and the ratio is settled, a blend removes preparation variance and is the better choice. If the work involves varying the relationship between compounds — different concentrations, different timings, one compound used as a control arm — then a fixed ratio is precisely the wrong thing and a stack is what the protocol requires.

Stacks in the catalogue group compounds that are commonly studied alongside one another. Tissue repair combinations are the most frequently ordered, typically pairing BPC-157 with TB500 or with GHK-Cu, and in some sets extending to three compounds by adding an immune-modulating peptide such as Thymosin Alpha-1. Neuropeptide sets pair compounds that appear together in the cognitive research literature, and longevity sets combine compounds with complementary research profiles.

The practical benefit is administrative rather than scientific, which is not a criticism. One order line, one shipment, one set of paperwork and one customs event instead of three is a meaningful reduction in the number of things that can go wrong between a purchase order and a bench.

The capsule category is intentionally the narrowest part of the catalogue, and it is narrow for a reason that is worth explaining rather than glossing over.

Most peptides are poor candidates for oral research formats. They are substrates for the same digestive proteases that break down dietary protein, and a sequence that performs predictably in a controlled preparation may not survive the gastrointestinal environment in any useful quantity. Listing every compound in a capsule presentation because it is technically possible to encapsulate it would produce a larger catalogue and a worse one.

Compounds appear in this category where the oral route has genuine research relevance. That includes shorter sequences with documented gastric stability, compounds where gastrointestinal research is itself the subject rather than an obstacle, and small molecules within the range that are not peptides at all and are inherently suited to oral study.

BPC-157 is the clearest example in the first two groups; oral BPC-157 has a substantial body of published research behind it, much of it concerned with gastrointestinal models where oral delivery is the point of the experiment rather than a compromise. Among the non-peptide compounds, MK-677 is a growth hormone secretagogue that is orally active and is one of the most frequently ordered products in the entire catalogue. 5-Amino-1MQ and Tesofensine are small molecules in the metabolic research range that are similarly suited to the format.

Capsule presentations are held to the same standard as everything else in the catalogue. A narrower category is not a less rigorous one.

Beyond the four main shop categories, the Peptide Works range includes presentations that suit particular research workflows. These are covered in full on the services page, and are summarised here because they often determine which listing in the catalogue is the right one to order.

Pre-mixed solutions

Pre-mixed products arrive already reconstituted to a defined concentration in bacteriostatic water, sealed and ready for use without any preparation step. The purity standard is identical to the vial range; the difference is entirely one of workflow.

The case for pre-mixed material is the elimination of preparation variance. Reconstitution is not difficult, but it is a manual procedure with several points at which a small inconsistency can enter — solvent volume, the vigour and speed of mixing, temperature during handling. Across a single preparation none of that matters much. Across a multi-week protocol with repeated preparations, it accumulates into variability that sits in the data and is difficult to attribute afterwards. A fixed concentration prepared once under controlled conditions removes the entire category of error.

The trade-off is real and should be understood before choosing the format. Peptide in solution is less stable than lyophilised peptide, which is why the bacteriostatic water used as the solvent contains a preservative to limit microbial growth after the seal is broken. Stored refrigerated and away from light, a pre-mixed preparation remains a robust research material — but it does not have the shelf life of a sealed lyophilised vial, and it should be ordered against a protocol rather than into long-term inventory.

Nasal spray presentations

Nasal spray presentations supply peptide solution in a metered-dose device, delivering a consistent volume per actuation. The research interest in this format concentrates on neuropeptides, where the nasal route is studied specifically because of the anatomical relationship between the nasal cavity and the central nervous system.

The practical attraction for a research setting is repeatability. A metered device dispenses a predetermined quantity each time, which standardises the delivered amount across a protocol without manual measurement at each point and simplifies record-keeping over a study that runs for weeks.

As with every other format in the catalogue, these presentations are supplied for laboratory research purposes only. The physical form of a product does not alter what it is or the terms under which it is supplied, and no presentation in this range should be read as implying otherwise.

The accessories category holds the consumables that a peptide order is usually incomplete without. Sourcing them alongside the compounds rather than from a separate supplier removes a second lead time and a second delivery to wait for, which matters more than it sounds when a protocol is scheduled around the arrival of material.

Bacteriostatic water is the standard reconstitution solvent for lyophilised peptides and the most frequently ordered item in the category. It contains a benzyl alcohol preservative that limits microbial growth after a vial has been accessed, which is what makes it the appropriate choice when a reconstituted preparation will be drawn from more than once over several days. It is offered in more than one volume, with the options shown on the product listing.

Sterile water is the preservative-free alternative, supplied in single-use ampoules for applications where a preservative is unsuitable. The choice between the two is a straightforward protocol decision rather than a question of quality: multiple accesses over time point to bacteriostatic water, single-use preparation points to sterile water.

The range also covers fixed-needle syringes in several gauges, pen delivery devices with their cartridges and needle packs, alcohol wipes for aseptic preparation, and sharps disposal products. Gauge selection is worth a moment's thought rather than defaulting to whatever is nearest — a finer needle handles thin solutions cleanly but resists viscous ones, and the appropriate choice depends on what is being drawn and in what volume.

A bundled accessory kit collects the most commonly used items for laboratories that would rather order the set than assemble it line by line.

If you already know which sequence a protocol calls for, this is the shortest route into the catalogue. The compounds below are stocked by Peptide Works; availability by format varies, and the presentations offered for each are shown on the product listing.

A – E

F – K

L – P

Q – Z

If a compound you need is not in this index, it is worth asking rather than assuming. Sourcing is sometimes possible through the same channels and to the same standard applied to everything else in the range. Where it is not, you will be told that plainly rather than supplied with material from a source we would not stand behind. Send a product enquiry with the compound, the format and the quantity you need.

Everything in the catalogue is sold on the same analytical basis, and it is worth setting out what that means in practice before you order rather than leaving it to be discovered afterwards.

The purity standard

The standard across the range is a minimum of 99% purity, verified by high-performance liquid chromatography. For structurally complex sequences — longer chains, peptides with difficult secondary structure, compounds where synthesis and purification are genuinely harder — the floor is 98%.

That second threshold is a statement of honesty rather than a loophole. Solid-phase synthesis becomes measurably more difficult as chain length grows: each coupling step is efficient but not perfect, small inefficiencies compound, certain sequences aggregate and certain residues invite side reactions. For some compounds a blanket 99% claim is not a mark of rigour but a sign that nobody looked carefully, or that the analytical method was never capable of supporting the number quoted. The figure recorded is the figure measured for that batch, not a target and not a rounded reassurance.

Identity confirmation

Purity alone is insufficient and it is a common place for documentation to stop. Identity is confirmed alongside it, typically by mass spectrometry, establishing that the molecular mass of the material matches the expected mass for the sequence. A highly pure compound that is the wrong compound is not a useful product — it is a very clean way to ruin an experiment. Purity without identity confirmation tells you only that the material is consistently something.

Certificates of analysis

A certificate of analysis is available for every product, and it corresponds to the batch you actually received rather than to a representative batch from some earlier point.

That distinction is one of the more important things on this page, because the alternative practice is widespread and close to meaningless. A certificate that does not correspond to the vial in your hand describes a different quantity of material on a different day. It has the appearance of documentation without the function of it. Any supplier can produce one good batch, test it thoroughly and attach that certificate to everything shipped afterwards.

If you need the certificate for a specific lot, request it and quote the lot number. Many institutions require batch-level documentation as a condition of use, and a supplier that cannot produce it on request is, for those researchers, not a usable supplier regardless of what the material costs.

Consistency between batches

Purity is the headline figure, but consistency between lots is usually what determines whether a supplier remains workable across the life of a project. A programme running for two years will consume multiple batches of the same compound, and if those batches differ meaningfully in purity or impurity profile, the material has introduced variance into a dataset intended to measure something else. That variance is silent: it widens error bars, weakens effects and makes results harder to reproduce, and the cause may never be identified.

Meeting the purity threshold and matching the established profile for a compound are two separate tests, and both are applied before a batch is released into the catalogue.

Ordering follows the pattern you would expect. Add the products you need to the cart, select the quantity or concentration options where a product offers them, and complete checkout. A confirmation email follows, setting out the payment options and how to complete payment for the order.

Payment methods

Bank transfer, card payment, and Bitcoin and other cryptocurrency are accepted. Zelle is available to customers in the United States: enter a United States address and select USD as the currency, and Zelle appears as a payment option at checkout, with the details supplied once the order is placed.

Two points about payment timing prevent most of the confusion that arises at this stage. International payments can take two to three days to appear in the account, so a payment that has left your bank will not necessarily be visible immediately. And receipt of payment is not separately confirmed — the next message you receive is the dispatch confirmation with your tracking details. The gap between the two is expected rather than a sign that something has failed.

Currencies and pricing

The store supports GBP, USD, EUR and CAD, selected from the currency switcher. Prices shown on each listing reflect the selected currency. Where a product is offered in multiple sizes, the listing shows the range and the specific option is chosen on the product page.

Discount codes

Promotional codes are entered at checkout in the Promo Code field, before payment is taken. Only one promotional voucher can be applied per order.

Changing an order

Orders move quickly after payment. If you need to amend or cancel, raise it within two hours of purchase. A full refund is available on cancellation provided the order has not yet been released for shipping, but orders are processed and shipped within twenty-four to forty-eight hours of payment being received — so this is a genuinely short window rather than a formality. Address errors are the most urgent thing to catch, since a parcel returned because of an incorrect or unaccepted delivery will be resent with the additional shipping cost charged to the customer.

Orders are dispatched within two to four working days of payment being confirmed. A tracking number and link follow by email, and the carrier updates the tracking as the parcel moves between depots. Carriers used include Parcel Force and DHL.

Standard shipping takes ten to fourteen days for delivery and Premium shipping takes three to five days, with tracking provided on both. Shipping costs vary by destination and are confirmed at checkout.

International transit is not entirely predictable and the published policy does not pretend otherwise. Approximately two to three per cent of orders can be withheld at customs, and each country's procedures differ. Where Shipping Protection is taken on an order, delivery is guaranteed: an order not received within twenty-one days from dispatch on Premium Shipping, or twenty-eight days on Tracked Shipping, is re-sent, and a re-sent order that also fails to arrive is refunded.

Import rules are the part of this that sits with the customer rather than the supplier. Research chemicals and peptides are not lawful to import everywhere, and checking the regulations of your own country before ordering is a requirement rather than a suggestion. Where correspondence from customs is received about an order, sending a copy allows us to supply what information we can to help release the shipment.

Returns are not accepted, because these products can degrade if mishandled and their integrity cannot be assured once material has left controlled conditions. Damaged deliveries are treated separately: report damage within seven days and a replacement or full refund is arranged. The full published detail is set out on the Peptide Works shipping and returns policy.

Researchers new to the catalogue most often ask which format to order, and the honest answer is that it depends on three things: how much control the protocol needs over concentration, how long the material will sit before use, and how many separate preparations the work involves.

Choose a vial when concentration matters and you want to set it yourself, when the material may be held for a period before the work begins, or when your group already has established reconstitution procedures. The vial is the most flexible presentation and the longest-lived, and it is the default for good reason.

Choose a pre-mixed solution when preparation variance is the problem you are trying to eliminate, when the protocol runs over repeated preparations that need to match one another, or when the work is time-sensitive enough that removing a preparation step is worth the shorter usable life.

Choose a blend when the combination is fixed and settled and you want the ratio guaranteed rather than prepared. Choose a stack when the relationship between compounds is itself part of the investigation, and a fixed ratio would remove the variable you intended to study.

Choose a capsule presentation where the oral route is the relevant route for the research question rather than a matter of convenience, and a nasal spray presentation where metered, repeatable delivery across a protocol is what the design requires.

Where the answer is not obvious, ask before ordering rather than after. A short product enquiry describing the work is quicker to resolve than an order in the wrong format, which cannot be returned.