steve_okc said:Vendor quality matters when discussing certificates of analysis.
This matches mine closely enough to be worth saying so out loud.
steve_okc said:Vendor quality matters when discussing certificates of analysis.
I tested my certificates of analysis batch through Janoshik — 98.1% purity. That's within acceptable range for compounded peptides. Turnaround was 12 business days.
The test costs ~$127 but gives you actual HPLC chromatography data plus mass spec confirmation. For the peace of mind alone, it's worth every penny. I test every new batch from a new vendor.
steve_okc said:Vendor quality matters when discussing certificates of analysis.
COA red flags for certificates of analysis — here's what to look for when reviewing a Certificate of Analysis:
- No HPLC data: If there's no chromatography graph, it's not a real COA
- Exact 100% purity: Suspicious — real testing always shows slight variation
- No batch number: Can't trace back to specific production
- No endotoxin testing: For injectables, this is essential
- Template looks like it was made in Word: Professional labs have standardized formats
I have seen fake COAs that are literally photoshopped. Always verify independently if possible.
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View ResultsFollowing on from steve_okc — and this may be the naive question:
How long did you give it before you decided it was working?
labquiet_amy said:COA red flags for certificates of analysis — here's what to look for when reviewing a Certificate of Analysis: No HPLC data: If there's no…
My vendor review relevant to certificates of analysis: ordered 5 times from my current compounder. Consistency has been excellent.
Shipping: Same-day local pickup
Packaging: Professional, discreet, proper labeling with lot/batch numbers
Purity: 99.6% average across orders (Janoshik verified)
Customer service: Responsive within 6 hours
Price: $158/month for semaglutide 1.7mg equivalent