Has anyone dealt with janoshik vs in-house testing?

From the other side of the consultation, briefly.

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: 98.6% average across orders (Janoshik verified)
Customer service: Responsive within 6 hours
Price: $150/month for tirzepatide 10mg equivalent

Dr.PeteFamMed said:

My vendor review relevant to certificates of analysis: ordered 5 times from my current compounder.

Community-verified vendors for certificates of analysis: I maintain a spreadsheet of Janoshik-verified test results submitted by community members. Across 48 submitted tests:

• 85% tested at ≥98% purity
• 10% tested at 95-98% purity
• 5% tested at <95% purity (concerning)

The vendors with consistently high purity results are listed in the Vendor Directory. We update monthly based on new community submissions.

Dr.PeteFamMed said:

My vendor review relevant to certificates of analysis: ordered 5 times from my current compounder.

HPLC results interpretation for certificates of analysis: when you get your Janoshik report back, here's what the numbers mean:

• Purity %: Should be >97%. Below 95% is concerning.
• Retention time: Should match reference standard for the peptide
• Related substances: Degradation products should be <2% total
• Single impurity: No individual impurity should exceed 1%

My last batch: 99.4% purity, 0.2% total related substances. Clean chromatogram with single sharp peak at expected retention time. Exactly what you want to see.

Dr.PeteFamMed said:

My vendor review relevant to certificates of analysis: ordered 5 times from my current compounder.

Genuinely useful, thank you. I had the facts and not the framework. Printing the relevant bit and taking it with me.

Moderator note: the sourcing question belongs in the vendor section and has been split out. Carry on.