First order, deliberately small, BPC-157 5 mg only. Documentation, transit and a PeptideMeter result at 99.3% all checked out, so the next one will not be small.
Vendor documentation · maintained record
GL Biochem (Shanghai) Ltd.
Major peptide synthesis company founded 1998 in Shanghai, China. ISO 9001 and cGMP certified with more than 1,500 employees and over 200 patents, supplying custom peptides and amino acid derivatives worldwide. No storefront is recorded for this vendor.
9.52,130 community reviews Verified
Dispatch and warehouses
Stock is held regionally, so an order ships from within the buyer’s own country rather than from the manufacturing site.
- Netherlands (Rotterdam) — European Union, 2-4 days
- Germany (Hamburg) — Germany, Austria, Switzerland, 2-4 days
- United Kingdom (London) — United Kingdom & Ireland, 2-3 days
- United States (California) — United States, 2-4 days
- Canada (Toronto) — Canada, 3-5 days
- Australia (Melbourne) — Australia & New Zealand, 3-5 days
Identity
- Legal name
- GL Biochem (Shanghai) Ltd.
- Short code
GL Biochem- Also known as
- GL Biochem, GLS
- Storefront
- glbiochem.net →
- City
- Shanghai
- Region
- Shanghai
- Established
- not recorded
- First documented here
- 29 May 2024
- Specialty
- Large-scale custom synthesis and amino acid derivatives; a supplier to other suppliers
- Record state
- Verified
The storefront is linked so a reader can verify a supplier directly. This page does not endorse suppliers, and no supplier has any influence over what appears on it — see the funding disclosure.
Verification record
Independent results submitted by members and recorded with the lot, the date, the method as reported, and the state. 5 verified, 0 disputed, 0 unverified.
| Date | Service | Compound | Lot | Method as reported | Result | State |
|---|---|---|---|---|---|---|
| 2026-06-25 | Janoshik | Custom 22-mer, sequence supplied | GLS-2606-1144 | RP-HPLC 214 nm + ESI-MS | 99.2% area; mass within 1.1 ppm | verified |
| 2026-03-31 | PeptideMeter | Amino acid derivative, Fmoc-protected | GLS-2603-0877 | HPLC purity + optical rotation | 99.5% purity; rotation within specification | verified |
| 2025-12-11 | Medutest | Custom 9-mer | GLS-2512-0455 | RP-HPLC + LC-MS | 98.7% area; identity confirmed | verified |
| 2025-10-09 | VendorInvestigate | Documentation audit | n/a | Document review across 21 certificates | Complete; procedure identifiers traceable | verified |
| 2025-05-20 | Janoshik | Custom 16-mer | GLS-2505-0201 | RP-HPLC, 214 nm | 98.4% area | verified |
- 2026-06-25, Janoshik: Specification sheet supplied alongside the certificate.
Documentation quality
5/5Assessment
5Records
4Services used
0Disputed
Documentation is industrial rather than retail: analytical procedure references, specification sheets, and certificates that distinguish release testing from characterisation. The certificate set assumes a technically literate recipient.
Maintainers' assessment
Verified. The largest and oldest operation in this directory, and one that sits upstream of several others as a raw-material or intermediate supplier. Its documentation conventions are the closest here to a regulated manufacturing environment. ISO 9001 is a quality-management standard and not a product guarantee, and their paperwork does not pretend otherwise.
Community reviews
26 reviews from members with a record on this site. Aggregate rating 9.5 of 10 across 2,130 reviews.
Peptide content reported at 99.3% alongside the purity figure, so I could convert straight to a working mass.
Domestic dispatch from their stock in Australia. Straightforward, day 3, exactly as quoted.
Consistent rather than flashy. Everything lands in the high nineties, and it lands there every time.
Support answered on a Sunday, correctly, with the batch record attached. That is well beyond what I expected.
Their raw material tested 99.4% against a reseller vial of nominally the same compound at 98.9%. Going direct is the whole argument.
Held locally in the United Kingdom, so the semaglutide 5 mg arrived on day 3 without an import step.
Asked for the chromatogram instead of the summary figure and got the real trace, legible, integration visible. They send it without hesitating.
Ordered on a Monday from their warehouse in Germany and it was here by day 4. That is the whole case for regional stock.
Fair pricing for the documentation standard, and delivery landed on day 3 as quoted.
Arrived on day 3 against a quoted 3. Customs paperwork was right first time, which is why it moved that fast.
Everything about the order was routine in the best sense — quoted 4 days, arrived in 4.
Shipped from their warehouse in Germany, arrived day 5, documentation complete.
Good communication throughout, accurate lead time, and the parcel arrived on day 4.
Ordered PT-141 10 mg twice. Both vials reconstituted cleanly and both matched their certificates.
Their warehouse in Germany carries the lines I reorder, so there is no wait on a factory run. Day 4 every time.
Steady supplier. PeptideMeter results have agreed with their stated figures on every lot I have submitted.
Straightforward order, arrived as described, documentation adequate and complete. Nothing to add, which is the point.
The certificate for lot GLB-26-613 carried method, wavelength, water content and an itemised related-substances table. Complete on the first pass.
Identity confirmed by mass spec on the certificate, not just an area-percent figure. Both questions answered on one page.
Sensible packing, sensible timelines, and a certificate that says what it should. No notes.
Solid on the sermorelin 5 mg. Purity where it should be, transit 4 days, paperwork in order.
Reliable on the general catalogue lines. Purity figures cluster tightly and the certificates match the lots.
The semaglutide 5 mg arrived on day 5 with the cold pack intact and the seal unbroken. Straightforward, exactly as described.
Same lot documentation as the factory ships, but out of their warehouse in Australia, so it landed on day 2.
Shipped with a stated storage recommendation and a shelf-life figure tied to it, without my asking.
Where GL Biochem sells
GL Biochem (Shanghai) Ltd. sells from its own storefront. The link below is marked nofollow and sponsored; it is here so the identity facts and the verification records on this page can be checked against what the seller publishes, and for nothing else. This site is paid nothing for it.
Visit GL Biochem at glbiochem.net →
Whatever a storefront claims, the lot on the vial has to match the lot on the certificate. That check is yours and nobody else can do it for you.
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Maintenance
Maintainers: KLindqvist, q.zhao_qa, impurity_table. Next review due 16 December 2026.
To add a record, file a structured report in vendor reports with the compound, lot, service, method and result. Reports missing any of those are moved to the discussion rather than the record. Allegations without documentation are hidden under R6 and the hiding is logged.
On what each service's report establishes: Janoshik Analytical · PeptideMeter · Medutest · VendorInvestigate