Peptide manufacturer in China
Factory-direct research peptides for laboratories and distributors: wholesale 10-vial packs, a batch COA with every order, and delivery with duties paid.
What you get when you buy direct
Direct, not relabelled
QSC Peptidology is the brand of QSC Sigma Limited, a China-based manufacturer. There is no reseller layer between the batch and your lab, so the price you see is the price per vial from the source.
Wholesale 10-vial packs
Every SKU is sold as a pack of ten identical vials from one batch. Smaller quantities can be arranged by email at the same per-vial price, and repeat buyers can apply for standing merchant pricing.
A COA for the batch you receive
Each batch ships with a batch-specific HPLC purity and LC-MS identity report, and published reports are listed in the COA library by batch ID.
Independent testing is welcome
Send a vial to any independent lab, for example Janoshik. If the result does not match the COA, we refund the order in full and reimburse your testing fee.
Delivered duties paid
Insulated shipments by DHL, UPS or FedEx to 58 countries, usually in 10 to 15 days, with import duties prepaid. Orders of $500 or more ship free.
Research use only
All materials are sold strictly for laboratory research by qualified buyers. They are not for human or veterinary use.
Wholesale price per vial, today
A few of the most-requested packs. Every price is for ten vials of one size; the full price list has every SKU.
| Product | 10-vial pack | Per vial |
|---|---|---|
| Retatrutide 10mg | $175.92 | $17.59 |
| Tirzepatide 10mg | $95.92 | $9.59 |
| Semaglutide 10mg | $87.92 | $8.79 |
| BPC-157 5mg | $60.92 | $6.09 |
| TB-500 5mg | $119.92 | $11.99 |
| GHK-Cu 50mg | $55.92 | $5.59 |
Common questions
Is QSC a peptide manufacturer in China or a reseller?
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QSC Peptidology is the brand of QSC Sigma Limited, a China-based research-peptide manufacturer. We sell direct to laboratories and distributors rather than relabelling another vendor's stock.
What is the minimum order for wholesale research peptides?
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Products are sold as 10-vial packs of one size. Smaller quantities can be arranged by email at the same per-vial price. Buyers who order regularly can apply for standing merchant pricing on the wholesale page.
How can I check that a peptide COA is real?
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Match the batch ID printed in the COA to the batch of the vials you received, check that it shows both an HPLC purity result and an LC-MS mass confirmation, and, if you want certainty, send a vial to an independent lab such as Janoshik. If your result does not match our COA, we refund in full and reimburse the test.
How long does shipping from China take, and who pays import duties?
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Delivery is typically 10 to 15 days by DHL, UPS or FedEx, delivered duties paid, so you do not pay import duties on arrival. Orders of $500 or more ship free; below that, shipping is calculated by package weight.
Do you offer private label or OEM peptides?
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Yes. You can customise from stock with your own label and packaging, or run a dedicated batch. See the private-label page for lead times and what is included.
How do I pay?
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Pay with USDT or USDC (10% off), by card or wallet through our payment partner (10% off, with a one-time ID check), or request a PayPal or Revolut link from support at the regular list price.
All products are sold strictly for laboratory and research use. Not for human or veterinary use. Nothing on this site is medical advice.