Quietly chosen by those who know.

The source researchers keep to themselves.

Research peptides made in small lots, checked by an outside lab, and shipped with the report to prove it.

See the eight

99%+ purity Outside lab tested Same day shipping before 2PM ET Discreet packaging, your call

XS boxes packed by hand, a vial resting in tissue

From our hands to yours

Every box is packed by our team, by hand, the day it's paid.

— The XS Team, Las Vegas & Atlanta

Most wanted

The collection

Eight compounds. Nothing filler.

We'd rather carry eight we can stand behind than eighty we can't.

Small lots, on purpose. We keep stock low so every batch is tested before it's listed. When a lot sells out, the next one ships only after it passes.

Picked for you

Tell us what you're
working on.

Four quick taps. We'll pull the three that fit your research.

4 tapsYour top 3Member access inside

Sets

Three vials, put together for you.

Curated by our team. Priced as one.

Lab reports

We show our work.

Every lot goes to an outside lab before we sell it. Most sellers keep those reports to themselves. We'll send you the one for your exact vial.

Made in small lotsEach lot gets its own number.

Checked by an outside labPurity and identity, by HPLC and mass spec.

iii

The report travels with the vialThe lot number on your vial matches the report.

About XS

A small team that would rather do eight things well.

XS Peptides started with one standard: know exactly what's in the vial. So we keep our collection short, make it in small lots, and send every lot to an outside lab before it's sold.

We're a small U.S. team in Las Vegas and Atlanta. When you call or text, you reach one of us, not a call center. And when you ask for a lab report, it's the one for your lot, not a stock PDF.

The XS Team

XS boxes packed by hand, with a vial in tissue

By appointment

Come see us in Las Vegas or Atlanta.

Pick up an order, meet the team, or talk through a bigger project in person. Tell us why you're coming and we'll email you a time.

Questions

Good to know.

How do I pay?

By secure Zelle bank payment. Place your order and your confirmation and private payment details arrive in your email. Scan our QR code in your bank's app, add your order number to the memo, and send. We confirm it and get your order moving.

Is paying by Zelle safe for me?

Yes. You pay inside your own bank's app, so we never see your bank details, and every payment is matched to your order number. Only pay using the QR code on our site or in your confirmation email. Questions first? Call, text or email support@xspeptides.com.

When will my order arrive?

Order before 2PM and it ships the same day, arriving in 5–7 days anywhere in the U.S. In Las Vegas or Atlanta, choose same-day delivery at checkout.

Is shipping free?

On every order of $300 or more, including same-day delivery. Under $300, shipping is $15 and same-day delivery is $20.

Can I return an order?

All sales are final. If your order arrives damaged or something is missing, contact us within 7 days and we'll replace or refund it.

How do I get the lab report for my vial?

Ask through the lab reports request, or call or text us. New lots come in often, so instead of a public library of old reports, we send the report that matches the lot number on your vial.

What is the XS List?

Our free membership. Members get 10% off their first order, member-only discount codes by email, early access to new products, priority shipping and a monthly check-in with our team.

Can I talk to someone?

Yes. Every order of $350 or more comes with a free one-on-one call, and members get a monthly check-in. You can always call, text or email support@xspeptides.com too.

Why can I only buy 3 of some items?

When an item is running low, we limit it to 3 per order so more researchers can get it.

Are these products for human use?

No. Everything we sell is for laboratory research only. Not for use in people or animals. We can't give advice on dosing or personal use.

How should vials be stored?

Our vials are lyophilized (freeze-dried). Store them at −20 °C, away from light.

Still wondering about something? Call or text , email support@xspeptides.com, or .

Members only

The XS List

Free to join. We just keep it small.

A private welcome10% off your first order, reserved for members. After that, private codes by email only.
Early access to new productsSee new lots before they go public.
Priority shippingMember orders are packed first.
Monthly check-in with our teamNew lots, restocks and order planning.

Partner perks · coming soon

Member pricing with independent testing labs and lab-supply brands we trust.