Salus Peptides recommendation: Store unopened lyophilised vials in a freezer at -20°C for long-term preservation. Refrigeration (2–8°C) is suitable for short-term storage.

• Keep vials sealed and dry
• Protect from light and humidity
• Avoid repeated freeze-thaw cycles

Incorrect Delivery Address Provided

We understand this can be stressful, but here’s how the process works.

Once a parcel has been dispatched, we are unable to amend the delivery address. This is due to courier system limitations — the shipping label has already been generated and the parcel is in transit within the courier’s network.

What Happens Next

The courier will attempt delivery to the address provided at checkout. If the parcel is deemed undeliverable, it will automatically be returned to us. Return transit can take approximately 10 working days, depending on the courier and location.

Once we have physically received the returned parcel, we will contact you by email with the available options:

Reshipment to the correct address (new postage costs apply), or

Refund minus the original shipping charges, in line with our returns policy

How to Avoid This Issue

We strongly recommend double-checking all delivery details before confirming your order, including:

House, flat, or building number

Street name spelling

Postcode accuracy

Town or city name

Even a small typo can redirect a parcel incorrectly and cause significant delay.

All products are supplied strictly for laboratory research use only and are not intended for human consumption.

These two terms are frequently confused, but they measure entirely different aspects of peptide production and quality.

Purity

Purity refers to how chemically “clean” a peptide preparation is. Specifically, it represents the percentage of material in the vial that corresponds to the correct target peptide sequence.

Purity is determined using High-Performance Liquid Chromatography (HPLC) and typically confirmed by Mass Spectrometry (MS). These analytical methods identify and quantify impurities such as truncated sequences, deletions, synthesis by-products, or oxidation variants.

The purity value is what appears on your Certificate of Analysis (CoA), for example, “98% purity.” This metric directly reflects product quality and is highly relevant to research reliability and reproducibility.

Yield

Yield is a manufacturing metric. It describes the total amount of target peptide successfully produced during synthesis, typically expressed relative to the theoretical maximum. Yield is commonly quantified in moles using Amino Acid Analysis (AAA).

Yield reflects production efficiency, not product quality. A lower yield simply means that more starting materials or synthesis cycles were required to obtain the desired amount of peptide. It does not affect the purity or net peptide content of the final, released product.

Why the Distinction Matters

For researchers, purity is the critical parameter because it determines how much of the material present is the correct peptide sequence. Yield, by contrast, is an internal manufacturing statistic and does not appear on the CoA because it does not influence the quality of the material supplied.

It is entirely possible, for example, to have a batch with moderate yield but excellent purity, or high yield but lower purity. From a research perspective, purity is the determining factor for experimental integrity.

All our Peptides products are supplied strictly for laboratory research use only and are not intended for human consumption.

Understanding the difference between gross weight and net peptide content is essential for accurate research calculations.

Gross Weight vs. Net Peptide Content

Gross (total) weight refers to everything present in the vial: the peptide itself, stabilising excipients such as mannitol, counter-ion salts introduced during purification (commonly TFA or acetate salts), and trace residual moisture remaining after lyophilisation.

Net peptide content refers specifically to the mass of the actual peptide molecules only.

Why There Is a Difference

Following purification and freeze-drying, peptides are not composed of pure peptide mass alone. The final lyophilised material typically contains the active peptide along with stabilisers, counter-ions from buffer systems, and minimal residual water. These components are normal and expected in research-grade peptide preparations.

Net peptide content is typically within the range of approximately 60–90% of the gross weight. The exact value is determined using validated analytical techniques such as Amino Acid Analysis (AAA), elemental analysis, and UV spectrophotometry.

Why This Matters for Research

For concentration calculations, researchers must distinguish between total vial weight and actual peptide content. However, when a vial is labelled (for example, “5 mg”), this refers to the net peptide content. The stated amount already accounts for analytical quantification of the active peptide mass.

As an illustration, a vial labelled 5 mg contains 5 mg of actual peptide (net content), in addition to excipients. The total physical powder weight may be higher, but reconstitution calculations should be based on the labelled net amount.

Net Peptide Content vs. Purity

Net peptide content and purity are separate analytical parameters.

Purity refers to the percentage of material that is the correct peptide sequence, typically determined by HPLC and confirmed by mass spectrometry.

Net peptide content refers to the proportion of total mass that is peptide versus excipients and counter-ions.

It is entirely normal, for example, to observe 98% purity (indicating minimal sequence impurities) alongside 70% net peptide content (with the remaining mass comprised of salts and stabilisers). Both values reflect standard and expected characteristics of research-grade peptides.

All our Peptides products are supplied strictly for laboratory research use only and are not intended for human consumption.

Think Your Parcel Is Missing?

Before assuming the worst, we recommend checking a few common causes of delay.

Please Check the Following First

Review your tracking link carefully, as most delays are explained there. Parcels may remain at courier depots over weekends or during busy periods before moving again.

Ensure the full delivery timeframe has passed before raising a concern. For UK deliveries, please allow up to 7 working days from dispatch (max).

We also recommend checking with neighbours and other household members, as couriers frequently leave parcels in safe places or with nearby properties. Please inspect common locations around your property, including porches, bins, side gates, garages, or designated safe-drop areas.

If Your Parcel Is Genuinely Missing

If the appropriate timeframe has passed and the parcel cannot be located, contact us and we will initiate an official courier investigation.

Courier investigations typically involve GPS delivery confirmation data, delivery photographs where available, driver statements, and depot-level reviews. These investigations generally take 5–10 working days to complete.

We are required to allow the investigation to conclude before issuing a refund or replacement, as this is a condition set by the courier companies. Once a parcel is officially confirmed as lost, we will resolve the matter promptly with either a replacement or refund.

A Reassuring Note

Approximately 90% of parcels reported as “missing” are delivered within the first week after a delay. In most cases, they are simply held temporarily or placed in an unexpected but secure location.

We appreciate your patience while delivery enquiries are resolved.

All products are supplied strictly for laboratory research use only and are not intended for human consumption.

Delivery Timeframes

UK Deliveries

UK orders typically arrive within 1–2 working days from dispatch. The majority of mainland UK deliveries are received the next working day.

These timeframes are estimates based on typical courier performance. While we dispatch promptly, we do not have control over courier delays. We appreciate your patience should any of these occur.

All products are supplied strictly for laboratory research use only and are not intended for human consumption.

Returns & Refund Policy

We believe in complete transparency. Due to the nature of pharmaceutical-grade research peptides, we cannot accept returns or offer refunds on delivered orders.

Why This Policy Exists

Once peptides leave our facility, we cannot verify handling, storage, or transport conditions. We cannot confirm temperature exposure or guarantee integrity for resale. Returned peptides cannot be restocked.

This policy maintains strict quality standards and protects product integrity for all customers.

When We Do Offer Refunds or Replacements

Orders cancelled before dispatch
Parcels confirmed lost by courier investigation
Parcels arriving visibly damaged (photographic evidence required)
Incorrect items sent due to our error

We will arrange refunds or replacements promptly in these cases.

When Refunds Are Not Available

Change of mind after delivery
Incorrect delivery address provided at checkout
Customs refusal or import rejection (partial refund issued once goods return, minus shipping)
Orders refused at delivery without prior arrangement

If a parcel returns due to incorrect address, we will reship at no cost once received.

How to Avoid Issues

Review your order carefully before purchase. Confirm product selection, quantities, and delivery details are correct. Contact us before ordering if you have any questions.

All products supplied by Salus are strictly for laboratory research use and are not intended for human consumption.

Thank you for your order — here’s what happens next.

Once your payment clears, it automatically enters our dispatch queue. We do not manually confirm individual payments, as this would significantly slow down processing times. Our system is designed to move orders through efficiently without delay.

Orders paid before 3:00pm (Monday to Friday) are typically dispatched the same day. Payments received after this cut-off will be processed on the next working dispatch day.

Tracking information is sent via email once your order has been dispatched, usually on the evening of the dispatch day.

There is no need to contact us to confirm payment receipt — if your payment has been completed, your order is securely in our system and moving through the dispatch process.

If more than 24 working hours have passed and you have not received tracking details, please check your spam or junk folder first. If you still cannot locate the email, feel free to contact us at sales@uk-peptides.com and our team will be happy to assist.

We appreciate your patience and your business.

We completely understand why these questions are asked. However, we are unable to provide direct advice or guidance regarding peptide usage, dosing, reconstitution protocols, or research methodologies.

As a supplier, Salus does not operate as a research consultancy, laboratory advisor, or medical provider. All products are sold strictly for laboratory research purposes only. Experimental design, solvent systems, dosing parameters, and application protocols vary significantly depending on specific research objectives and institutional standards. Providing procedural guidance could be misinterpreted as endorsing non-research use, which would place our regulatory standing and licensing at serious risk.

For this reason, researchers should conduct appropriate due diligence before purchasing. This includes reviewing peer-reviewed scientific literature, consulting published studies, and referring to institutional or regulatory guidelines relevant to their field. Reputable scientific databases such as PubMed can be valuable resources. Caution is advised when reviewing informal online sources, as much of the information shared in forums is anecdotal and not scientifically validated.

Our role is to supply high-quality, analytically verified research peptides, provide transparent quality documentation, ensure compliant handling and shipping, and answer questions relating to product specifications and storage conditions.

Responsibility for experimental design, protocol development, regulatory compliance, and lawful research use rests entirely with the purchaser.

We are committed to supporting the research community by providing reliable products and clear product information. The research itself, however, remains solely in the hands of the investigator.

All products are supplied strictly for laboratory research use only and are not intended for human consumption.

Yes, a cloudy appearance in solution is completely normal for certain peptides and does not indicate any issue with quality or purity.

Some peptides are more prone to forming slightly opaque or milky solutions after reconstitution due to their inherent molecular characteristics. Examples commonly reported to display this behaviour include HGH Fragment 176-191, Kisspeptin-10, Oxytocin, and Follistatin 344, as well as other sequences containing a higher proportion of hydrophobic (water-repelling) amino acids.

This effect is driven by chemistry rather than quality. Peptides containing hydrophobic residues such as tryptophan, phenylalanine, or leucine may resist full interaction with aqueous solvents. In solution, they can form small aggregates or micelle-like structures. These microscopic particles scatter light, producing a cloudy or slightly milky appearance. This is a known physicochemical property of certain sequences and is not indicative of impurity or degradation.

Importantly, visual cloudiness does not affect peptide content, analytical purity (as verified through quality control testing), or suitability for laboratory research applications.

Where protocol requirements demand improved clarity, some researchers choose to adjust solvent systems or pH conditions in line with their experimental design. Slightly acidic aqueous environments are often explored for peptides with hydrophobic characteristics, though solvent selection should always be determined by the specific research application and laboratory standards.

SALUS has supplied research peptides exhibiting these characteristics for many years without issue. This behaviour is simply a structural property of particular molecular sequences.

All products are supplied strictly for laboratory research use only and are not intended for human consumption.

All peptides sold by Salus are <strong>strictly for research purposes only. They are not intended for:

• Human consumption or use
• Animal consumption or veterinary use
• Therapeutic applications
• Medical diagnosis or treatment

By purchasing from us, customers confirm they are acquiring these compounds for legitimate scientific research purposes only. We take this responsibility seriously and ensure all sales comply with UK regulations.

Peptides are short chains of amino acids linked together by peptide bonds. By precisely controlling the amino acid sequence, defined molecular structures can be created for targeted research applications. Peptides are widely used in biochemical signalling studies, receptor interaction research, and molecular pathway investigation.

How Salus Synthesises Peptides

At Salus, we manufacture research-grade peptides using Solid-Phase Peptide Synthesis (SPPS), a precise stepwise method that ensures accurate sequence assembly. The process begins by anchoring the first amino acid to a solid resin support. Protected amino acids are then added sequentially to build the desired chain in a controlled manner. Once synthesis is complete, the peptide is cleaved from the resin, protective groups are removed, and the product is purified to ensure high sequence integrity. The final material is lyophilised to produce a stable, research-ready powder.

All products supplied by Salus are intended strictly for laboratory research purposes and are not for human consumption.

There's no cause for concern — variation in appearance is completely normal with research peptides.

Several factors influence how a peptide looks once lyophilised. The amino acid sequence plays a key role, as different molecular structures behave differently during freeze-drying. Lyophilisation parameters such as temperature, pressure, and drying duration also affect the final texture and structure. In addition, molecular weight and density can impact how compact or voluminous the final material appears.

As a result, peptides may present as a light, fluffy powder, a dense cake, a slightly crumbled solid, or occasionally a more crystalline structure. These visual differences are typical and do not indicate an issue with quality or integrity.

All Salus products are supplied for laboratory research use only and are not intended for human consumption.