A peptide is a short sequence of amino acids linked together, smaller than a full protein, that the body uses to send signals between cells. These signalling functions make peptides relevant across areas like tissue repair, immune regulation, and cell-to-cell communication.

Researchers study peptides because of how selectively they bind to receptors and influence specific biological pathways. That specificity makes them useful for laboratory work aimed at understanding cellular mechanisms in a controlled, reproducible way.

Orders can be paid by credit or debit card, UK bank transfer, or cryptocurrency (Bitcoin, Ethereum, and USDT). Full bank details and step-by-step payment instructions are available on our payment instructions page.

Every peptide ships lyophilised (freeze-dried), which keeps it stable in transit and during storage before use. Keep unopened vials somewhere cool, dry, and out of direct light, ideally refrigerated if you're holding stock for a longer period. After reconstitution, vials should go straight in the fridge and be handled with standard sterile lab technique.

We currently deliver within the United Kingdom only. Place your order before 2pm on a business day and it goes out same-day; anything after that cutoff, or over the weekend, ships the following business day. Most orders land within 48 hours of dispatch, and you'll get tracking details straight from us once it's on its way. Orders over £200 qualify for free shipping automatically, no code needed.

Because of the nature of research products, we're not able to accept returns. That said, if something arrives damaged or isn't what you ordered, email us at hello@peptidedepotuk.com within 48 hours of delivery and we'll sort it out quickly.

Every product we sell is independently lab-tested before it reaches our catalogue, confirming purity and consistency against research-grade standards. You'll find a Certificate of Analysis (CoA) available for each product we stock.