Peptide Works
Research-Grade Peptide Supplier
Peptide Works
Research-Grade Peptide Supplier
From lyophilised vials and nasal sprays to pre-mixed solutions and oral capsules. Every format held to the same independently verified purity standard.
If you have sourced research-grade peptides before, you already know the headache. Inconsistent purity. Suppliers that disappear after three months. Certificates of Analysis that lack credibility. The opposite of all that is what drove Peptide Works from the start — one reliable supplier where the compound in the vial matches what appears on the label every time, no exceptions.
We provide high-purity synthetic peptide products, all manufactured to a purity standard of at least ninety-nine percent and verified through independent third-party HPLC and mass spectrometry testing. That is not a marketing line, but a quantifiable and documented benchmark. Each batch is accompanied by its own Certificate of Analysis to let you see the numbers for yourself before a single milligram enters your protocol.
Breadth is as important as purity. At this point, Peptide Works offers more than two hundred individual product listings when you consider every format and dosage variation. You could order that same compound as a lyophilised vial, a pre-mixed solution, a nasal spray, or — where the science allows — an oral capsule. For instance, https://peptide-works.com/ace-031/ showcases one of our most requested compounds. We carry blends with complementary peptides in a single vial, multi-vial stacks for complex research protocols and combination nasal sprays that put two compounds into one device. And as peptide research goes beyond the compound itself, we provide the reconstitution solvents, syringes, injection pens and sharps disposal equipment to run a clean, well-ordered workflow from beginning to end.
Peptide Works' distinction is not from one specific thing — it is the sum of them all working in concert. Independently certified purity, not a product quality lab with an incentive to pass every batch. A deep enough catalogue that reduces the need to source from a second vendor. Formats specific to the way research is actually conducted — because a researcher conducting nasal-delivery studies and one administering subcutaneously have different needs, both of which must be addressed appropriately. International delivery with temperature-sensitive packaging.
This page goes through every service offered by Peptide Works. No sales pitch — just a clear overview of what we do, how we do it, and how it may support your supply chain.
Lyophilised peptide vials are the backbone of our catalogue and the format that most researchers default to. Lyophilisation — freeze-drying — removes all moisture from the peptide after synthesis, resulting in a stable dry powder sealed under vacuum or inert gas in a glass vial. This matters because peptides in solution decompose faster. An effectively stored lyophilised vial can remain stable for months or even years depending on the compound, whereas a reconstituted peptide almost always needs refrigeration and has an applicable window of use within a few weeks.
When you order a lyophilised vial from Peptide Works, you get an accurate amount of peptide powder in a stoppered, crimped-cap vial. Add your own bacteriostatic water — we also supply that, but more on accessories further on — swirl gently until the powder dissolves and draw out your research dose. It takes a few minutes and allows you to take total command over concentration. You control how much solvent you add per millilitre, which means you control the final concentration — our https://peptide-works.com/hgh191aa/ is one example of how this approach works in practice. This flexibility is important for researchers running protocols at different doses.
Our vial catalogue encompasses the entire breadth of peptide research. The growth-hormone class includes CJC-1295 (both DAC and non-DAC), Ipamorelin, GHRP-2, GHRP-6, Hexarelin, Sermorelin and Tesamorelin. For the research community working in growth factor pathways, we have HGH Fragment 176-191, full-sequence HGH191aa, IGF-1 LR3, MGF and PEG-MGF. If your protocols address tissue repair and recovery, you will find BPC-157, TB500, Thymosin Alpha-1, KPV and LL-37 — compounds that have garnered significant interest in research on wound healing, gut-lining epithelial integrity and immune modulation studies.
This range is just as deep in terms of cognition and neuroprotection. Selank and Semax are available for research into anxiolytic and nootropic investigations respectively. Sleep architecture researchers find DSIP of particular interest. Researchers investigating potential pathways for cognitive protection and enhancement are supported by compounds including Pinealon, P-21, and Adamax. For work on longevity and cellular health, Peptide Works provides Epithalon, FOXO4-DRI, Humanin, MOTS-C, SS-31, Thymalin, Cartalax (Vilon), and Bronchogen — a collection covering telomere biology to mitochondrial function to senescent-cell biology.
And then there are all the other compounds which do not fall neatly into a single category: Melanotan I and II, PT-141, Oxytocin, Kisspeptin, Gonadorelin, Triptorelin, HCG and HMG, Follistatin 344, ACE-031, GDF-8, Adipotide, AICAR, AMPK, ARA-290, B7-33, GHK-Cu, NAD+, PNC-27, SNAP-8, Orexin A, VIP, PTD-DBM, L-Glutathione, Protirelin and TRH. The point is not to memorise the list — it is to know that whichever corner of peptide science your research occupies, Peptide Works will almost certainly have the compound you require, lyophilised and ready for your freezer. We regularly add new compounds as more research is published and demand arises, which means the catalogue you see today will not be the same one six months from now.
There are laboratories that do not want to reconstitute from powder. You might be running a high-throughput protocol where the time required for reconstitution, multiplied over dozens of vials, contributes to bottlenecking. You might occasionally be operating in a field environment where precise volumetric measurement is not feasible. At other times, you simply want to remove one more variable — the potential that human error during dilution creates variability in your data.
That is where our pre-mixed peptide product range comes in. These are identical compounds held to the same ninety-nine percent-plus purity standard, already in solution and ready for immediate use. You draw straight from the vial — no bacteriostatic water, no reconstitution calculations — the peptide is dissolved in the carrier and ready to go.
Peptide Works has developed pre-mixed versions of almost all peptides in the lyophilised catalogue. Options include BPC-157, TB500, Ipamorelin, CJC-1295 (with and without DAC), GHRP-6, Selank, Semax, Epithalon, PT-141, DSIP, Thymosin Alpha-1, GHK-Cu and hundreds of others. A simpler way of putting this: if we offer it in a vial, we are nearly always offering it as a ready-mixed solution as well.
A practical tradeoff to be aware of is that lyophilised peptides have a longer shelf life than their pre-mixed counterparts where the peptide is already in aqueous solution, which can lead to hydrolysis over time. Pre-mixed solutions can be stored in the fridge and used within the time periods outlined by the product documentation, delivering research-grade performance equal to that of dry powder. For many protocols, the convenience is more important than the shelf-life consideration.
If you are training new lab staff, pre-mixed solutions are also a straightforward choice. While not particularly challenging, reconstitution is the step in the process where things can go wrong — incorrect volume leading to under or overdosing, introducing air bubbles into the vial, or contamination with a non-sterile needle. By removing that step, error rates are reduced for new team members during onboarding. When they are comfortable with technique, they move to lyophilised vials. This means Peptide Works complements your lab with both options, rather than forcing the entire operation to conform to one specific format.
For several good reasons, nasal delivery is a serious focus of the peptide field. The highly vascularised nasal mucosa provides a large surface area relative to its volume and avoids first-pass hepatic metabolism. Intranasal administration enables systemically measurable absorption — allowing for non-invasive research protocols and enabling some peptides to be studied without subcutaneous or intravenous delivery.
Peptide Works offers single-compound nasal sprays across the full spectrum: BPC-157, Selank, Semax, Epithalon, PT-141, Oxytocin, DSIP (delta sleep inducing peptide), TB500 (Thymosin Beta 4), Thymosin Alpha-1, KPV, LL-37, Ipamorelin, Sermorelin, Tesamorelin, CJC-1295 (DAC and non-DAC), GHRP-2, GHRP-6, Hexarelin, Melanotan I, Melanotan II, Kisspeptin, Gonadorelin, Thymalin, and HGH Fragment. All sprays are designed as metered dose units to ensure that each actuation delivers a precise amount of peptide.
Our combination nasal stack range is where it becomes especially useful. These pair two complementary compounds in one spray device, greatly simplifying multi-peptide research protocols. For example, the BPC-157 and TB500 Nasal Spray combines two of the most investigated repair-enabling peptides into a single delivery device. The Semax and Selank Nasal Stack combines two nootropic compounds that have different but partially overlapping mechanisms of action.
Other stacks include DSIP and Epithalon for sleep-and-longevity research, PT-141 and Oxytocin as well as PT-141 and Kisspeptin for sexual-function pathway studies, Thymosin Alpha-1 and LL-37 for immune-related work, Epithalon and Thymalin for combined telomere-and-thymus protocols, BPC-157 and KPV for gut-and-inflammation work, and VIP with BPC-157 for neuropeptide researchers.
You get the same verified ninety-nine percent purity supply chain for both compounds in every stack. Each nasal stack simplifies your sourcing and ends the need to manage two separate spray devices. If your protocol uses two peptides that have been paired together already, Peptide Works has handled the combination for you.
Nasal sprays also represent one of the most accessible peptide formats for researchers new to the field. There is nothing to reconstitute, no injection technique to master and no sharps disposal needed. The metered-dose device gives you a predetermined amount each time, removing the need for volumetric calculations. Nasal delivery can be a practical and obvious first step for piloting studies, feasibility assessments and developing early protocols before injectable formats are warranted.
Multi-compound research protocols are the norm in peptide science, but sourcing each of the components individually from different suppliers means you keep encountering challenges — mismatched purity standards, inconsistent timelines, and logistics that slow down your focus. Peptide Works tackles this with two connected but separate product categories: blends and stacks.
A blend is one lyophilised or pre-mixed vial that contains two or more already-combined peptides. You only reconstitute once, and you draw a dose that contains everything. We offer a catalogue including BPC-157 with TB500, GHRP-6 with CJC-1295 DAC, GHRP-6 with CJC-1295 No DAC, HGH Fragment 176-191 with CJC-1295 DAC blend, Ipamorelin with CJC-1295 No DAC, and various triple mixes including Ipamorelin, HGH Fragment 176-191 and CJC-1295 in both DAC and non-DAC variations.
If you are running a fixed-ratio protocol and want to limit the number of reconstitution steps as well as injection volumes, blends are arguably the most useful format. One vial, one reconstitution, one draw. You do not have to do the maths yourself — these compounds are dosed at established research ratios.
A stack consists of multiple individual vials that are sent out together. Each compound is kept in its own vial so you can dose them precisely and independently. Stacks available from Peptide Works cover a variety of different research applications.
The BPC-157, GHK-Cu and Thymosin Alpha-1 Stack bundles three compounds investigated for tissue regeneration, copper-peptide signalling and immune modulation respectively. The BPC-157, TB500 and GHK-Cu Stack is another triple that focuses on repair. Other stacks target completely different research directions — the Selank and Semax Stack for cognitive-research protocols, the Tesamorelin and Ipamorelin Stack for growth-hormone-axis work, the Epithalon and DSIP Stack pairing a telomere-associated peptide with a sleep peptide, and the Thymalin and Epithalon Stack combining two compounds studied for thymic regeneration and biological ageing.
For independent researchers exploring copper-peptide pathways in parallel with other signalling compounds, the GHK-Cu and PTD-DBM Stack and the GHK-Cu and TB500 Stack are available. Also offered are the BPC-157 with VIP Stack for gut-health and inflammation research and the KPV with BPC-157 Stack.
In terms of practicality, the difference between a blend and a stack is control versus convenience. Blends save time. Stacks enable independent dosing of each compound. Peptide Works carries both, so you can use the right format for the protocol rather than adapting the protocol to the format. If you are unsure which route best suits your research design, ask yourself whether a fixed ratio with minimal preparation matters most, or the ability to titrate each compound separately. The answer typically makes the decision clear.
Peptide research has focused primarily on injection and nasal delivery, however a growing number of studies have sought to determine whether meaningful bioavailability can be obtained via oral dosing. This question is currently being investigated with several compounds, for which we carry capsule formats at Peptide Works.
A compound that has generated particular interest for oral investigation given its origins as a protein fragment found in gastric juice.
A dual-compound oral delivery format which can assist researchers examining gut-mediated synergistic repair pathways.
Focused on longevity research involving the telomerase-associated peptide Epitalon in an oral format.
An oral format for in-depth research into the copper-peptide complex and its biological activities.
Targeting inflammation-related studies through oral delivery of the anti-inflammatory tripeptide.
Available as a separate oral product for independent investigation of TB500 via the oral route.
A growth-hormone secretagogue and non-peptide small molecule frequently used alongside peptide research protocols.
Oral compounds supporting metabolic and weight-related research domains.
Not every peptide is suitable for the oral route — gastric, intestinal and enzymatic degradation act as genuine obstacles for most sequences. Our capsules contain compounds that have either been shown to possess some level of oral bioavailability in the literature or are structurally resistant to gastrointestinal digestion. This is why we do not manufacture a capsule form of any peptide simply because someone asks for it. We do not make it if the science does not support the format.
For many researchers, however, capsules offer practical advantages — no reconstitution, no needles, no cold-chain requirements for short-term use, and simple dosing protocols within a wide range of contexts. They further enable study designs that could be impractical or too cumbersome with injectable formats — longer duration dosing schedules, compliance studies, and oral bioavailability comparisons versus other delivery routes. The capsule range will not be as extensive as our injectable catalogue and this is intentional, but the options available are steadily increasing as new data is added to the literature concerning oral peptide uptake.
A peptide is only as reliable as the workflow surrounding it. You can have the purest BPC-157 on earth, but if you reconstitute it improperly or draw it with unsuitable equipment, your data is already compromised before you begin. Peptide Works offers the entire range of ancillary products, so you can order everything needed to properly store and handle research peptides from a single source.
Bacteriostatic Water — sterile water with 0.9 percent benzyl alcohol to prevent microbial proliferation and allow multiple draws over days or weeks. Provided in research-relevant volumes. Sterile Water is also available in 2ml ampoules for single-use applications needing a preservative-free solvent.
Three fixed-needle syringe types: 27-gauge, 29-gauge and 30-gauge. Higher gauge numbers mean thinner needles. A 27-gauge is suited for many intramuscular protocols, a 30-gauge for subcutaneous with minimal tissue disruption, and the 29-gauge provides a middle ground. All three are fixed-needle format, minimising deadspace and reducing compound waste.
The Deluxe Pen and Empty Cartridge Set, Standalone Empty Cartridges, Empty Pen Case for Storage, and Injection Pen Needle Packs are all available. Pen systems offer precise volume control over standard syringes, making them appropriate for protocols requiring small, consistent doses. The cartridge-based design allows alternating between different reconstituted peptides.
Alcohol Wipes for sanitising vial stoppers and preparation surfaces. A Sharp Safe container and a Visibin for Used Needles — a clear sharps bin for checking fill level at a glance. Responsible sharps disposal is essential for any research environment.
Groups all essentials into one order — bacteriostatic water, syringes, wipes and a sharps bin — for researchers setting up a new lab or needing a standalone preparation platform for a second site. Instead of four individual orders, everything arrives in a single box.
We keep our shelves stocked with these accessories because we believe a truly responsible supplier will not just sell you the compound and walk away. It is the complete chain — from synthesis purity to reconstitution to safe disposal. If any link in that chain breaks, the research suffers. And since we supply every element, you can be certain the quality standard of our peptides is reflected in the tools you use alongside them.
This is where you need to be very careful, as purity is the source of many issues in the peptide industry. Simply printing "99% pure" on a label is easy for any supplier. Proving it batch after batch, with independent documentation, and making that documentation available to all customers — that is a far higher standard.
All products at Peptide Works are held to a minimum purity standard of ninety-nine percent. That number is verified by High-Performance Liquid Chromatography, or HPLC, which separates a peptide sample into its components and determines how much of the target compound is present compared to any impurity. When we say ninety-nine percent pure for a vial of BPC-157, that means HPLC analysis showed at least ninety-nine percent of the material in that vial is the correct peptide sequence, and less than one percent was detected as fragmented sequences, deletion fragments or other synthesis byproducts.
HPLC is not the only test we run. The second confirmation of molecular identity comes from mass spectrometry. HPLC gives you the degree of purity. Mass spectrometry tells you what the sample actually is — it measures the molecular weight of the compound and compares that value to known values for the target peptide sequence. If the mass does not match, the batch cannot ship. In combination — one providing purity, the second providing identity — these represent the minimum analytical requirements which are non-negotiable for any Peptide Works product.
All testing is compiled into a Certificate of Analysis, or COA. A Peptide Works COA records the compound name, batch number, date of synthesis, purity percentage as determined by HPLC, mass spectrometry confirmation of molecular weight, amino acid sequence verification and a pass-or-fail determination. Each product comes with its COA when shipped. If you misplace it, you can request another one. You can share it with a colleague or an institutional review board as needed.
There are in-house labs and there is nothing wrong with them per se — many are excellent. However, when the same organisation sells a product and also certifies its quality, there is a structural conflict of interest. Independent third-party labs have no financial incentive in the outcome. They report what they find. That layer of separation is what gives a COA credibility, and this is a non-negotiable for Peptide Works.
Many suppliers only issue a COA upon request, only for certain products, or provide it in formats that make independent verification difficult. At Peptide Works, a COA is standard with every shipment — you do not need to request it, chase for it, or pay for it. The document is legible, comprehensive and specific to the batch you received. When you are presenting data to a review board, a journal or simply to a collaborator, the COA is your materials and methods section backup.
This matters because reproducibility of research relies on compound integrity. If your peptide is ninety-nine percent pure rather than ninety-two percent, that remaining eight percent is non-identical and completely unknown material — a potential source of confounding variables in your results. Two researchers running the same compound at different purities may get completely different outcomes — not due to a difference in biology, but a difference in reagents. Removing that variable is largely why Peptide Works exists. With our compounds, you can know what is in the vial.
Research does not stop at the border. Peptide Works ships internationally from Europe and North America at all times, ranging from university labs to private research facilities in Asia-Pacific and independent investigators working out of home-based setups in locations you would not expect peptide science to be happening.
Stability of peptides during transport is part of our service. One advantage of lyophilised powders is that they are relatively stable at ambient conditions for limited time periods. More care is needed with pre-mixed solutions and nasal sprays. We package compounds to ensure they will not be affected by temperature extremes, physical shock or exposure to light during the shipping process. We use insulated containers, suitable cushioning materials and carriers with guaranteed transit times to minimise the interval between dispatch and delivery.
Every order leaves in discreet, professional packaging without logos or product details visible on the outside of the parcel. This is standard practice, not a special request. After dispatch, you will receive tracking information to monitor your order from our facility to your doorstep. Dispatch is prompt — we know that research timelines do not pause while waiting for deliveries, which means we process orders quickly.
If you have questions about shipping to a particular country, customs paperwork or delivery estimates, we can help. We have shipped to enough destinations at this point that we can often describe how logistics will unfold before your order has even left our facility.
The most common feedback from international customers is that they want consistency. Getting a parcel delivered once is one thing. Knowing that packaging quality, dispatch speed, and tracking visibility will be the same next time — that is the reliability which underpins a cross-border supply relationship that works.
You have ordered your peptides. They have arrived intact. The question now is how to preserve and manage them so they stay usable for as long as possible. Peptide Works provides documentation with each order, and below is a summary of best practice.
Unopened vials of lyophilised material should be stored frozen at minus twenty degrees Celsius or below. For most peptides, they will remain stable at this temperature for twelve months or longer. When a freezer is not accessible, a standard refrigerator at two to eight degrees Celsius is acceptable for short-term storage — usually a few months depending on the compound. Store vials protected from light, and avoid repeat freeze-thaw cycles after opening and partial reconstitution.
As soon as you dilute a lyophilised vial with bacteriostatic water, the clock begins running. Store reconstituted peptides in the fridge (not in the freezer) at two to eight degrees Celsius. The bacteriostatic water's benzyl alcohol preservative prevents microbial contamination but cannot stop peptide degradation indefinitely. Reconstituted peptides are typically used within four to six weeks, though some compounds remain stable longer. If cloudiness, particulates, or an atypical odour are present, discard the vial. Never filter or salvage a compromised solution. A replacement vial is always more cost-effective than contaminated data.
Reconstituting a lyophilised peptide is straightforward but the details matter. Using an alcohol wipe, clean the vial stopper first. Draw a syringe with an amount of bacteriostatic water according to the quantity of peptide in your vial and the concentration you want to achieve. Insert the needle through the stopper and allow water to flow slowly down the vial wall. Never inject it straight onto the powder, and do not shake the vial. Peptides are fragile molecules and violent agitation leads to denaturation. Swirl gently until the powder has dissolved completely. The solution should be clear. Take your research dose and recap the vial for refrigeration.
Calculating concentration is simple arithmetic. For example, if your vial holds 5mg of peptide and you dissolve it in 2ml of bacteriostatic water, your concentration is 2.5 mg/ml. Dilute to a volume suitable for your protocol. When extracting reconstituted peptide, insert your needle through the middle of the rubber stopper, withdraw the plunger slowly to prevent a vacuum, and tap the syringe barrel to bring air bubbles towards the needle end. These are simple practices but they genuinely matter for reproducible data. Peptide Works includes a reconstitution guide with every lyophilised vial order.
Selecting a peptide supplier is not a choice most researchers make lightly, nor should it be. The compound you introduce into your protocol becomes your data. By using a supplier that compromises on quality, you risk unreliable results — and you may not even know what has gone wrong until weeks of effort attempting to reproduce findings have been wasted due to reagent-level issues.
Peptide Works approaches supply differently. We began with a straightforward premise: researchers deserve not to worry about whether their peptides are truly what the label indicates. With each compound, independent HPLC and mass spectrometry verification is carried out prior to shipment. Each order comes with a Certificate of Analysis. Every single format that we provide — lyophilised vials, pre-mixed solutions, nasal sprays, oral capsules, blends and stacks — all come with the same ninety-nine percent purity standard. There is no tiered quality. The BPC-157 from our nasal spray is the same BPC-157 grade as from our vial. The Ipamorelin in a blend is the same Ipamorelin we sell individually.
Catalogue breadth matters too. Peptide Works is a full-spectrum supplier with over fifty peptide compounds on offer across more than two hundred product listings. Growth hormone secretagogues, repair peptides, nootropics, longevity compounds, reproductive-biology peptides and immune modulators — if there is serious research interest in a peptide, we likely carry it. And if we do not, we are constantly considering new additions. Our catalogue is not static. It grows as the science matures.
The picture is completed by the accessories range. Bacteriostatic water, sterile water, three different syringe gauges, a full pen-based injection system, alcohol wipes, sharps containers — everything to get yourself set up, all from the same order page and in the same box. This may sound like a small time-saver, but anyone who has had a peptide arrive on Monday only to find the bacteriostatic water is backordered from another vendor until Friday can appreciate what a single-source supplier saves.
Shipping packaging is specially designed to stabilise temperature-sensitive compounds in transit around the globe. For after your product arrives we offer guidance regarding reconstitution and storage. And our team knows what these compounds are and how researchers use them — so when you contact us, you get an answer from someone who understands the work, not a generic response from someone who has never set foot in a laboratory.
Peptide Works is not the only supplier. But it is the one developed around a simple concept: provide researchers precisely what they ordered, demonstrate that it is pure, offer it in whatever format their protocol calls for and ship it to any location in the world. That is the service. No theatrics — just reliable compounds from a supplier who takes the work as seriously as you.
Peptide research is demanding enough as it is. You do not need to be worrying about whether your supplier is keeping up. Protocols change. Compounds get added. New team members need onboarding. Shipping deadlines shift. The job of a good supplier is to absorb that complexity, allowing you to concentrate on the science — and this is precisely why Peptide Works exists. We have built the catalogue, quality systems, logistics infrastructure and product knowledge to support you at every step. The rest is up to you.