Community-funded testing initiative — 6 month update

Dr.LeslieOBGYN said:

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

Third-party testing services for certificates of analysis besides Janoshik:

• Janoshik: Gold standard for peptide community, ~$155, 10-14 day turnaround
• Valitech: US-based, ISO 17025 accredited, ~$225
• Eurofins: Full pharmaceutical testing suite, more expensive but comprehensive
• ChemTox: Basic identity and purity testing, ~$105

Janoshik is the community standard but any ISO-accredited analytical lab can verify peptide identity and purity. The key is independence — don't rely solely on the vendor's own testing.

BariatricNurseD said:

One addition: an unstated method makes a report close to uninterpretable.

Genuinely useful, thank you. I had the facts and not the framework. Taking it to my next appointment.

Dr.LeslieOBGYN said:

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

I tested my certificates of analysis batch through Janoshik — 97.6% purity. That's within acceptable range for compounded peptides. Turnaround was 12 business days.

The test costs ~$123 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.

mike_mod said:

Two reports on the same product from two laboratories, four percentage points apart, and no method stated on either.

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

Moderator note: leaving this open. It is being argued well and the disagreement is the useful part. No action needed from anybody.