Frequently asked
questions

Browse the collection, pick your size, and add items to the cart. Checkout on the website with instant Open Banking (UK), crypto, or send your order via WhatsApp or Telegram. We confirm availability — usually within a few hours.

On a computer, the cart buttons open WhatsApp or Telegram in your browser — you do not need the phone apps installed. WhatsApp Web (web.whatsapp.com) works after you link your phone once via QR code. Telegram Web (web.telegram.org) works in any browser with a free account. UK customers can also pay instantly by bank at checkout. If you would rather not use messaging apps, email your order details to help@zelopeps.com and we will reply with availability and payment details.

Pay instantly by bank (Open Banking) at checkout for UK delivery addresses, cryptocurrency via our secure checkout, or message us on WhatsApp/Telegram for manual bank transfer details. Payment must be received in full before we dispatch.

Orders paid and confirmed before 2 PM on a working day are dispatched the same day, subject to stock. We ship via Royal Mail. Once your parcel is handed to Royal Mail, UK delivery usually arrives the next working day.

Orders over £150 qualify for free shipping. Below that, rates vary by country — from £5 for UK nations (England, Scotland, Wales, Northern Ireland) up to £15 for most of Europe. You will see the total in your cart before you checkout.

Yes. Orders ship in plain packaging with no product names on the outside. Tracking is sent once your parcel is handed to Royal Mail.

Current COAs are published at zelopeps.com/coas — open the report for your compound and strength. Every batch is tested by Janoshik Analytical (HPLC + mass spectrometry). The verification key is on the certificate; enter it at janoshik.com to confirm it is authentic. If you need a report we have not listed, message us on WhatsApp or Telegram.

No. All compounds are supplied strictly for laboratory and in-vitro research. They are not for human or animal consumption. By ordering you confirm you understand this.

Add a code in the cart before checkout — a partner code, a promo such as FIRSTORDER, or both. Partner codes and promo codes stack with each other and with bulk tiers (£200 / £300 / £500). Pens, refills, and supplies count toward bulk and most percentage-off codes. VIALS15 is vials only. PENS20 is pens and refills only — one promo code per order. Wholesale cases (10+, 20+, or 50+ of one line) use case pricing only — 25% / 30% / 40% — and do not take partner codes, promo codes, first-order, bulk, or multi-vial. In a mixed cart a shop-wide code applies to the shop items only. The 7.5% multi-vial deal applies to vials only on the same peptide line — we apply multi-vial or the stacked cart discounts, whichever saves you more. Friend invite credit is separate store credit and also stacks.

In your account, open Invite and copy your unique code or link. When a friend creates an account with that code they get £10 store credit — it stacks with other discounts at checkout. You get £10 store credit after their first order is marked paid. Credit applies to products, not shipping. You cannot refer yourself.

Zelopeps runs a raffle every month. Every £50 spent on paid orders from the 2nd through 8pm UK on the 28th earns one ticket. Spend is products after discounts, not shipping. Leftover carries to your next paid order that month — see the bar in Account. Five winners at 8pm on the 28th for store credit (£150, £100, £50, £25, £25). Credit goes on the winner’s account and applies at checkout to products only — not shipping. The same person can win more than once. Guest checkouts still earn tickets on that email; register with it to see tickets and any prize. Pending or cancelled orders do not count. There is no free entry.

A full pen is pre-filled and includes the reusable device — ready to use. A refill is the cartridge only — for when you already own the device. Pens are 60-unit devices (1 unit = 0.01ml) with a 3ml cartridge max. 10mg pens are filled with 1ml BAC water, 20mg with 2ml, and 30mg and above with 3ml. We fill each one after your payment clears, then dispatch — they are not stored pre-made. Open the pen guide at zelopeps.com/pens/guide to pick your pen and see how many units on the dial equal each amount. The reusable pen device (£30, under Supplies) is the empty device bought once; after that you can order refills only. Open a product and tap the Pen tab, or use the Pens filter in the shop menu.

No. Pens and refills are filled to order after payment, before dispatch. They are not sitting pre-filled on a shelf.

Yes. Pre-filled nasal sprays are available for Semax, Selank, Melanotan I, Melanotan II, GHK-Cu, NAD+, DSIP, and MOTS-C — no reconstitution and no pen device. Open the product and tap Nasal, or use the Nasals filter in the shop menu.

No. We do not accept returns — sales are final once dispatched. If a parcel arrives damaged or is the wrong item, message us with photos. That is support, not a returns process.

Vials: keep lyophilized peptides cool, dry, and away from light — typically refrigerated, or frozen for longer storage. After reconstitution, store in the fridge and use within the timeframe appropriate for your research protocol. Pens and refills arrive already filled — keep them cool, dry, and away from light. Do not freeze a filled cartridge. See the pen guide at zelopeps.com/pens/guide.

Vials: concentration is peptide (mg) divided by bacteriostatic water (ml). Draw volume is the target dose divided by that concentration; syringe units are draw volume × 100 on a U-100 insulin syringe. Pens and refills arrive already reconstituted — do not add BAC water. Open the pen guide at zelopeps.com/pens/guide to see fill volume and how many units on the 60-unit dial equal each amount. For laboratory planning only.

No — guest checkout is always available. Create a free account to see past orders, save delivery details for next time, and reset your password. Zelo Points, store credit, and friend invites only apply if you are signed in. Guest raffle prizes wait on that email until you register. We’ll email a 6-digit code to confirm new accounts, and again if you sign in from a browser we don’t recognise. We link orders by delivery email. You can still track any order with your order reference and postcode.

We reply on WhatsApp and Telegram typically within a few hours, 9am–8pm UK. Include your products and delivery postcode for the fastest quote. Email help@zelopeps.com if you would rather not use messaging apps.