GL Biochem
GL Biochem (Shanghai) Ltd.
Shanghai · China · est. 1998 · source page added 25 Aug 2023
Buy direct from GL Biochem at glbiochem.net →
Their storefront, not ours. Marked nofollow and sponsored, and nobody here is paid for it.
The synthesis house rather than the shop. Founded 1998, ISO 9001 and cGMP, more than 1,500 staff and 200 patents. There is a fair chance a vial you bought from somebody else started here. Ordering as an individual is possible, but the process assumes a purchasing department: batch-specific certificates arrive as standard rather than on request.
- Legal name
- GL Biochem (Shanghai) Ltd.
- Short code
- GL Biochem
- Also known as
- GL Biochem, GLS
- Shop domain
- glbiochem.net →
- City
- Shanghai
- Established
- 1998
- Community rating
- 91%
- Independent tests logged
- 4
Regional stock, so orders ship inside the buyer’s own country.
- 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
- Large-scale manufacturer with real certifications and a patent estate behind it
- Amino acids and resins alongside peptides — useful if you synthesise rather than buy
- Batch-specific certificate as standard, not on request
- Minimum quantities and paperwork are built for institutional buyers; ask for the smallest catalogue quantity on your line before assuming
- Lead times are quoted per synthesis rather than per order — ask for the production window as well as the shipping one
- Ask for the batch record and the certificate together; the documentation set is the most complete on this page
| Date | Service | Compound | Batch | Claimed | Result |
|---|---|---|---|---|---|
| 2026-02-12 | Janoshik | Semaglutide raw | GLS-2602 | 99.0% | 99.3% |
| 2025-09-23 | PeptideMeter | Tirzepatide raw | GLS-2509 | 98.5% | 98.9% |
| 2025-03-04 | Janoshik | BPC-157 raw | GLS-2503 | 99.0% | 99.1% |
| 2024-06-19 | Medutest | Semaglutide raw | GLS-2406 | 99.0% | 99.3% |
| From | To | Carrier | Days |
|---|---|---|---|
| Shanghai | EU | DHL | 6–9 |
- 1[Vendor] GL Biochem vs GGPeps on the same compound, same month — both cleared 97.5%c/coa · 14k points · 51 comments
- 2genuine question about VendorInvestigate that I am slightly embarrassed to askc/vendorvetting · 8.4k points · 11 comments
- 3[Meta] proposal — a flair for vendor postsc/vendorvetting · 7.6k points · 39 comments
- 4do order records actually matter or is it forum lore at this pointc/vendorvetting · 5.2k points · 40 comments
- 5[Vendor] GGPeps vs GL Biochem on the same compound, same month — both cleared 99.0%c/coa · 4.3k points · 46 comments
- 6reading Janoshik threads from 2024 and half of it aged badlyc/vendorvetting · 3.6k points · 27 comments
- 7genuine question about PeptideMeter that I am slightly embarrassed to askc/vendorvetting · 2.9k points · 61 comments
- 8[Vendor] GL Biochem vs JEEP on the same compound, same month — both cleared 97.0%c/darkspot · 2.1k points · 48 comments
- 9[Meta] the PeptideMeter rule is doing its job and people should stop complainingc/vendorvetting · 2k points · 61 comments
- 10[Vendor] GL Biochem order #4 — Germany, 12 days, no drama, receipts insidec/customs · 1.7k points · 28 comments
- 11[Janoshik] FGP cagrilintide — first independent number i have seen for itc/labresults · 1.5k points · 49 comments
- 12[Lab] 10th independent test on GL Biochem — 99.4% on a claimed 99.0%, and the trend is the interesting partc/researchpeptides · 1.4k points · 51 comments
10 lots now, all between 97.7% and 98.2%. tight band beats one big number every time. they flagged the delay in advance instead of after.
water content was on the document without me having to ask for it. the lot-specific document, not the catalogue one, which is the distinction that matters. this is one order, not a dataset.
they will quote lines nobody else will even respond about, and it came back clean. lines I actually reorder are the ones they keep in the Netherlands.
first order was small on purpose. PeptideMeter said 97.4%. second order was not small. research use only, obviously.
weighed 12 vials against label out of curiosity. all within 2%. fill consistency is underrated. pulled an old cert for a lot from 6 months back without any fuss.
11 orders, 10 months, no substitutions and nothing quietly swapped after payment. no notes.
lot GLB-24-502 tested 97.1%. certificate said what the vial said which said what the invoice said. they flagged the delay in advance instead of after.
quoted 2 days. arrived 2 days. this is the whole review. if the next one holds I will stop testing every lot.
bought LL-37 5 mg expecting to have a complaint. do not have one. annoying.
day 4 from France warehouse, tracking updated every single hop. boring supplier. highest compliment I have.
I asked for a second certificate for a lot bought eight months earlier and they found it and got an actual answer, not a copy-paste. pulled an old cert for a lot from 10 months back without any fuss. would buy again. have bought again.
cold pack was still solid on arrival day 3. in Spain. in summer.
9th order, zero drama. that is genuinely all I have to say. they flagged the delay in advance instead of after. happy. moving on.
asked a method question and got a method answer with no sales copy attached. the reorder was identical to the first order in every respect I could check. would buy again. have bought again.
split the order across two lots to compare. came back within 0.1 of each other. solid. that is it. solid.
sent one to Janoshik and one to VendorInvestigate because I did not believe the first result. both agreed. fine, I believe it. invoice and vial and cert all agree on the lot. would buy again. have bought again.
their certificate has the residual-solvent screen. I did not expect that and I am not over it.
the analysis date on the certificate was three weeks before dispatch. the purity figure is stated by RP-HPLC with the wavelength named. solid. that is it.
the certificate is the same layout every time, which makes comparing lots trivial. the lot-specific document, not the catalogue one, which is the distinction that matters. defaulting to them until something changes.
I have certificates from about 10 suppliers and theirs is the one I would hand to someone as an example. catalogue is actually deep, not deep-looking. no notes.
stock said in stock. it was actually in stock. shipped same day. wild. every vial in the box was the same lot so the comparison was real. not sponsored, not affiliated, just kept the receipts.
reordered at 10 months to check for drift. 96.8% then, 96.8% now. no upsell attached to the answer, which I noticed because it is unusual.
the thing that sold me is peptide content being listed separately from purity. nobody does that and everybody should. pulled an old cert for a lot from 9 months back without any fuss.
packing was a tamper strip that had to be cut rather than peeled. someone in that warehouse cares. customs paperwork right first time which is why it was fast. test your own vial regardless. always.
shipped out of Australia, landed day 7. no customs, no waiting, no chasing. they flagged the delay in advance instead of after. would buy again. have bought again.
blind submitted the ipamorelin 5 mg to Janoshik, did not say whose it was. 98.8% vs 98.7% claimed. catalogue is actually deep, not deep-looking.
GL Biochem (Shanghai) Ltd. sells from its own storefront. Read what they say about themselves against the log above, then decide.
Go to the GL Biochem store — glbiochem.net →
Check the lot on the vial against the lot on the certificate when it arrives. A good record predicts your batch; it cannot guarantee it, and no storefront can.