Test your Peptides -> recommendations?

[2sspectrum]

Hi all,

I have been thinking about buying peptide kits for research purposes from providers who only do in-house testing, therefore "self"-testing is encouraged.

From my understanding:

• Relevant labs (in Europe): Janoshik; are there any other trustworthy labs? I've also found Liquilabs s.r.o. Czech, but haven't heard from them before and dont know their pricing (would probably need to ask by email)
• Relevant tests (from the Janoshik website)
  1. ID, amount and purity analysis
  2. Endotoxin Analysis
  3. Sterility -> is that even needed if following @randy's advice and using a filter?
  4. Heavy Metals -> seems overkill (unless possibly relevant if one would work with GHK-Cu)?
  5. TFA Analysis -> never seen before
  6. LCMS Screening for Peptide Contamination -> would identity and purity be sufficient? theoretically there could some other peptides in the vial which can lead to degradation?
  7. CHNS Mass Report -> never seen before

Testing seems expensive, and therefore my preference would be to find a balance where I can restrict testing to the most critical ones without compromising the safety of my lab rat (unfortunately, none of the peptides qualify for the Finnrick's free testing list).

It seems fairly difficult to find providers in Europe who have a wide range of peptides in their offering with the respective tests in place (compared to the US) - if you know one and think that's more efficient than self-testing, please let me know.

Thank you in advance for your advice and don't hesitate if you need more information.