Research peptides for curious minds.
Proof first.
Then switch.
Every lot is independently tested by ILS Laboratories. Read the batch reports before you buy.
code WELCOME20
Shop in one tap
No account needed. Every price is open and guest checkout works.
For laboratory research use only. Not for human or veterinary use. 21+.
- 26 batch reports published
- 99.62% average purity (HPLC)
- 23/23 HPLC results above 99%
- ILS Laboratories tests every lot
Coming from Peptide Sciences? Welcome in.
- Free U.S. shipping $100+
- Card, Apple Pay, Google Pay
- Plain packaging
- Lost or damaged in transit? Covered.
Independent testing
The proof is public.
Here's a real one. Every vial carries a lot number. Every lot gets a report like this.
- HPLC purity
- 99.75%
- Test date
- Aug 25, 2026
- Independent laboratory
- ILS Laboratories
- Amount per vial
- 5mg
About reviews
New kid. Open book.
Quill is new, so there's no wall of reviews here yet. We won't invent one. Instead, every lot gets an independent lab report, and the reports are public. Judge us on those.
Buyer's checklist
How to check any supplier.
Six checks a careful buyer runs before ordering. Here's how Quill answers each one.
A named independent lab
ILS Laboratories tests every Quill lot.
A lot number that matches a report
Printed on every vial and matched to that lot's published report.
HPLC purity and identity
Purity and identity by HPLC. Lowest purity result so far: 99.06%.
Endotoxin, lot by lot
Quill reports endotoxin for every lot.
Reports you can read before you buy
The batch-report library is public. 26 records so far, 3 results still pending.
A clear answer for lost or damaged parcels
Lost or damaged in transit? We make it right.
Read the guarantee
Run all six on Quill. We'll wait.
How switching works
Three steps. That's the switch.
Confirm you're 21+
A quick research-use check. No account needed.
Browse the catalogue
Every price is open. Volume pricing applies per vial.
Order and track
In-stock orders placed before the daily cut-off are dispatched within 24 business hours. Tracking is emailed when your order ships.
Quick answers
Questions, answered.
The short versions, before you switch.
Do I need an account?
No. Every price is open and you can check out as a guest. A free account is there if you want saved addresses and early restocks.
How fast do orders ship?
In-stock orders placed before the daily cut-off are dispatched within 24 business hours. Weekend and holiday orders ship the next business day. Orders ship from within the U.S., and tracking is emailed. Domestic delivery typically takes 2 to 5 business days after dispatch, though it isn't guaranteed.
How can I pay?
By card, Apple Pay or Google Pay, through a secure checkout. Orders ship in plain packaging.
What does research use only mean?
Everything Quill sells is for laboratory research use only. It is not for human or veterinary use, and it is not approved by the FDA. You must be 21 or older to order.
What if my parcel is lost or damaged?
If it's lost or damaged in transit, we make it right. Read the delivery guarantee.
How does WELCOME20 work?
Use code WELCOME20 on your first order and 20% comes off.
Still curious?More answers in the FAQ
Seen the proof?Make the switch.
Switched already? Share your referral code and earn 10% store credit on referred orders.
For laboratory research use only. Not for human or veterinary use. 21+.
Products are not approved by the FDA and are not intended to diagnose, treat, cure or prevent any disease.