Peptide Works FAQs

International shipping is available to the majority of countries, although the availability can differ according to the destination and any applicable restrictions. The various shipping options available will be shown to you when you reach the checkout page.

Shipping Protection provides additional cover if your order does not arrive within the stated delivery timeframe.

If an eligible order covered by Shipping Protection is not received within 21 days of dispatch for Premium Shipping, or 28 days for Tracked Shipping, we will arrange a replacement. If the replacement order is also not received, we will issue a refund in accordance with our Shipping Protection terms.

Orders are usually dispatched within 2–4 working days after payment has been received. Payments made by international bank transfer may take longer to clear, which can delay dispatch.

The cost of shipping will depend on the destination and the delivery option you choose; at the point of checking out, the shipping methods available to you, together with the associated costs and estimated delivery times, will be shown.

Yes, there is the possibility of ordering with expedited shipping for certain destinations. Extra charges could be imposed, and the different options will be shown when you get to the checkout page.

We deal with a variety of well-established shipping companies and postal partners; the carrier used depends on the destination and the shipping option chosen.

We ship orders using a tracked delivery service, with Standard and Premium shipping options available where applicable. We will display available delivery methods at checkout.

If you have a question about international shipping, or your country is not available during checkout, please contact our customer support team before placing your order.

Orders are dispatched from either the USA or the UK, depending on the destination. Most orders are currently shipped from the UK.

If your item arrives damaged whilst in transit or you receive the wrong goods, please contact our customer service team immediately. We will then examine the situation and arrange a replacement if appropriate.

Due to the nature of our research products, we cannot accept returned products for resale. Customers are responsible for confirming that the research material ordered is appropriate for their intended laboratory research requirements.

If an order arrives damaged or incorrect, please contact our customer support team so that we can review the issue and arrange a replacement where applicable. We may also provide refunds under our Shipping Protection terms, where applicable.

Please contact us as soon as possible if you mistakenly input the wrong shipping details. If your order has not yet been dispatched, we may be able to update the information.

Once we dispatch your order, we can’t change the delivery details. However, if the package is returned to us due to incorrect shipping information, we can resend it, but the customer will have to pay any extra reshipping costs.

Yes. Customs regulations and import requirements vary between countries and regions. Customers are responsible for checking the laws, regulations and import requirements that apply in their destination before placing an order.

Peptide Works is unable to confirm whether a particular research product can legally be imported into every destination.

Customs authorities may check, delay or hold foreign shipments. These processes are outside the control of Peptide Works and clearance times may vary depending on the destination.

If your order is affected by customs, please contact our customer support team. Where an eligible order is covered by Shipping Protection, we will review the circumstances and arrange a replacement where applicable under our Shipping Protection terms.

Customers remain responsible for complying with any local customs and import requirements.

Because of the nature of our research products and the need to maintain proper storage and handling conditions, Peptide Works will not accept products returned for resale.

If your order arrives damaged or incorrect, please contact our customer support team so that we can review the issue and arrange a replacement where applicable.

If your package arrives damaged, please contact our customer support team as soon as possible with the relevant order details.

If an eligible shipment is lost in transit, or arrives damaged, we will review the circumstances and arrange a replacement where applicable under our shipping and Shipping Protection terms.

If an order is returned because the shipping address is inaccurate or incomplete, we will resend it after we verify the correct information.

Additional shipping charges may apply, and these will be the responsibility of the customer.

Orders are shipped in appropriate external packaging with the necessary delivery and return information. Product identification and relevant information are provided with the supplied research materials where applicable.

Our research materials are stored under controlled conditions at our storage facilities before dispatch. Storage requirements may vary between products, and relevant storage information is provided for the individual research material where applicable.

Peptide Works research peptides are manufactured by specialist facilities in Europe and the United States.

Manufacturing and quality documentation relating to individual products or batches is available where applicable.

Peptide Works does not provide guidance on the human or veterinary use, administration or application of its products.

Our products are supplied solely as research materials for laboratory and scientific research and are not intended for human or veterinary use, consumption, administration, diagnosis or therapeutic application.

For questions relating to product specifications, analytical documentation or the supplied research material, please contact our team.

Analytical documentation is available for Peptide Works research materials where applicable. Depending on the product and batch, this may include documentation such as a Certificate of Analysis (CoA) or HPLC analysis.

Researchers should refer to the documentation supplied or published for the relevant product or batch when reviewing reported identity, purity, and other analytical characteristics.

If you have a question about the analytical documentation available for a particular product, please contact our team.

Peptide Works research peptides are supplied in laboratory-grade glass vials selected for the storage and containment of peptide research materials. Product presentation may vary depending on the specific peptide and batch.

Peptide stability varies according to the individual compound, storage conditions, and other factors. For this reason, we do not apply a single shelf-life estimate to every peptide. Researchers should refer to the storage information supplied for the specific product and any available batch documentation.

Research peptides should be stored under the conditions specified for the individual product and protected from environmental factors that may affect stability, such as excessive heat, moisture and direct light. Where specific temperature requirements apply, these will be stated in the relevant product information.

Yes. Peptide Works products are supplied solely as research materials for laboratory and scientific research. Appropriate laboratory handling procedures should be followed according to the material being studied and the requirements of the research environment.

Peptide Works products are not intended for human or veterinary use, consumption, administration, diagnosis or therapeutic application.

Lyophilized peptide materials can vary in physical appearance between different compounds and batches. The material may appear as a compact cake, fragmented material or loose powder. Movement during transportation can also alter its physical appearance.

Visual appearance alone should not be used to determine peptide identity or purity. Researchers should refer to the analytical documentation available for the relevant product or batch.

Yes. Movement and vibration during transportation can cause lyophilized material to shift, fragment or change in appearance inside the vial. A change in physical presentation does not, by itself, establish that the chemical identity or purity of the material has changed.

Where analytical documentation is supplied, this should be used when reviewing the characteristics of the research material.

Storage requirements can vary between research compounds. Researchers should check the relevant product page and available product or batch documentation for information applicable to the material they have purchased.

If clarification is required regarding the supplied research material or its documentation, please contact the Peptide Works team.

Peptide purity describes the proportion of the detected peptide-related material attributed to the target peptide under a specified analytical method.

HPLC is used for assessing the purity of peptides by separating the various components in a sample and then measuring the chromatographic peaks that result. UV detection at wavelengths such as 214 nm is often employed since peptide bonds have a strong absorption in this region.

The reported HPLC purity should be understood in light of the analytical method and all other relevant batch records since on its own it does not give a full measure of all the components which may be in a sample.

Where available, researchers can review the analytical documentation provided for the relevant Peptide Works product or batch.

Lyophilization, also known as freeze-drying, is a process in which water is removed from a material under controlled conditions at low temperature and reduced pressure.

Many peptide research materials are supplied in lyophilized form. Different compounds have different storage requirements and stability, thus researchers should adhere to the information for the specific product or batch, rather than adopting one storage term to all peptides.