Sep 18, 2025 at 4:42 AM#1
PeptidePure has been getting some buzz so I decided to be a guinea pig. Here's my first order report.
Order Details:
- Semaglutide 5mg/2mL vial x2
- Ordered: February 18, 2026
- Shipped notification: February 19 (next day — good sign)
- Delivered: February 22 (4 business days to Midwest)
- Price: $129/vial ($258 total, free shipping over $200)
Packaging:
Insulated box with two gel cold packs. Vials wrapped individually in bubble wrap. Temperature indicator strip showed green (acceptable range). Included printed COA for each vial. Professional packaging overall — better than some established vendors honestly.
COA Review:
The included COA lists:
- Purity: 99.1% (HPLC)
- Endotoxin: <0.5 EU/mg
- Sterility: Pass
- pH: 7.2
- Testing lab listed as "in-house"
Red flag: "In-house" testing with a 99.1% purity claim. That's suspiciously high and there's no way to verify in-house results. I immediately sent one vial to Janoshik.
Janoshik Results (received March 4):
- HPLC Purity: 96.8%
- Main impurity: Des-amino semaglutide at 1.9%
So the actual purity is 96.8% — perfectly acceptable, but NOT the 99.1% their in-house COA claimed. That's a 2.3 percentage point discrepancy, which is significant.
Subjectively:
Using the second vial currently (started at 0.25mg/week). Appetite suppression is noticeable and comparable to what I've experienced with other vendors' sema. No injection site reactions. Solution reconstituted perfectly clear.
Overall: 6.5/10. Product seems fine but the inflated COA numbers are a trust issue. If they were honest and said 96.8% I'd have no complaints. The dishonesty (or incompetence in testing) is the problem.
46 16Dr.PathRoch, mona_PHX, andrew_nyc and 43 others
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Sep 18, 2025 at 4:48 AM#2
This is exactly why in-house COAs should be taken with a massive grain of salt. A 2.3% discrepancy isn't catastrophic but it indicates either:
1. Their in-house HPLC isn't properly calibrated
2. They're intentionally inflating numbers for marketing
3. They tested a different sample than what they shipped
None of these are great. For context, when Janoshik tests the same sample twice they're usually within 0.3-0.5% of each other. A 2.3% discrepancy between in-house and independent testing is outside what I'd consider normal analytical variation.
The product itself seems fine at 96.8% but I'd want to see them address the COA accuracy issue.
Last edited: Sep 18, 2025 at 10:48 AM
45 15mark_tokyo, hans_munich, jason_sac26 and 42 others
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Sep 18, 2025 at 4:54 AM#3
Thanks for doing this. The price point at $129/vial is really attractive compared to $149-159 at established vendors. But if I can't trust their COA, how do I know the next batch will also be 96.8%? It could be 93% and their COA would still say 99%.
Does anyone know if PeptidePure is a licensed pharmacy or more of a research peptide supplier?
Last edited: Sep 18, 2025 at 10:54 AM
44 14ZaraB_AL, JakeSmashed95, NauseaFreeNow and 41 others
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Janoshik Analytical — Independent Testing
Trusted third-party HPLC & mass spectrometry analysis. Verify peptide purity with the lab the community relies on. Independent. Accurate. Transparent.
Verify Your PeptidesGL Biochem (Shanghai) Ltd. — Direct Manufacturer
Est. 1998. The synthesis house behind the vials you send for testing. ISO 9001 and cGMP certified, 1,500+ staff, batch-specific COA with every order.
Browse GL BiochemSep 18, 2025 at 5:00 AM#4
They're a 503A compounding pharmacy based in Texas. I checked the Texas State Board of Pharmacy database and they are licensed (license #38291, current). So they're legitimate from a regulatory standpoint.
503A pharmacies compound on a patient-specific basis (require individual prescriptions) vs 503B facilities that can compound in larger batches. Both are legal but 503A has less FDA oversight. Not inherently worse, just different.
43 13nick_SD_fit, ben_calgary, patPC_UT and 40 others
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Sep 18, 2025 at 5:31 AM#5
Good detective work on verifying their license. I'll add them to our vendor tracking spreadsheet.
For PeptidePure specifically — I'm going to reach out to them about the COA discrepancy and ask them to comment. Legitimate pharmacies should be willing to discuss QC methodology and address concerns about testing accuracy. Their response (or lack thereof) will be informative.
In the meantime, their listing will include a note about the COA accuracy concern with a link to this thread.
Last edited: Sep 18, 2025 at 7:31 AM
42 12PurityPaulOR, MaxMetOK, MounjBrad and 39 others
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