SeqLine Bio · Peptide Sciences alternative
Comparing peptide suppliers
Looking for a Peptide Sciences alternative?
SeqLine Bio is a research peptide manufacturer in Guangzhou, China, selling direct to B2B buyers. If you are comparing suppliers, this page sets out what we make, how small you can start and how to check our lots. SeqLine Bio is not affiliated with Peptide Sciences.
What we offer
Our terms in brief.
We sell to laboratories, distributors and brands, for research use only. We do not sell to consumers or give dosing advice.
| Who makes it | Our own line: synthesis, purification, lyophilization, QC and packaging |
|---|---|
| First order | From 1 kit (10 vials) for most catalog compounds |
| Lot records | Public COA for every published lot: HPLC purity (spec NLT 98.0%) and MS identity |
| Lead time | Confirmed ready-to-ship orders, including samples from released stock, dispatch within 3 business days after written payment confirmation. Samples requiring preparation: 3–7 business days; production and private label: 7–15 business days after the agreed conditions are complete. Private label also requires artwork approval. Transit and customs are additional. |
| Your label | Private label from 100 kits (1,000 vials); neutral label by default |
Catalog
Compounds buyers often ask about.
GLP-1 research peptides: tirzepatide, retatrutide, cagrilintide (see the GLP-1 2026 note). Other peptides: BPC-157, TB-500, GHK-Cu, Sermorelin, Ipamorelin, CJC-1295, NAD+, Epithalon, MOTS-c. The full catalog lists every compound and vial size.
FAQ
Questions buyers ask when changing supplier.
Is SeqLine Bio connected to Peptide Sciences?
No. SeqLine Bio is an independent manufacturer in Guangzhou, China. This page describes our own products and terms only.
How can I check SeqLine Bio before ordering?
Look up the lot in our public COA library, read the company fact sheet and supplier verification page, and test a one-kit sample in a lab you choose. The quotation names the contracting entity, payee, production site and releasing QC.
Do you supply GLP-1 compounds?
Yes. Tirzepatide, retatrutide and cagrilintide are supplied as research peptides to B2B buyers. Buyers confirm the regulatory requirements of their destination market.
How fast do you reply?
Within 4 hours during business hours. Send compound, quantity and destination; we reply with price, lead time and the COA for the lot you would receive.
What is the minimum order?
One kit (10 vials) for most catalog compounds. Private label starts at 100 kits (1,000 vials).
B2B and research use only. Nothing on this page is medical advice or a dosing recommendation. See our compliance position.
Next step
Tell us the compound, quantity and country.
We reply within 4 hours during business hours with price, lead time and the COA for the lot you would receive.