Lab vs Lab, We tested 5 Labs using the same Kit.
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@Randy where can i get “wangs peptides” for randys nephew?
@hectoraponte Unc Wang only does limited runs of 10 bottles at a time...or i bought a sticker maker.
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Excellent article!!! Probably one of the most useful and relevant I have read to date. Many thanks to you guys for putting in the time and effort to educate others with great unbiased information in a format that is easy to comprehend. Love the labels!
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This is a great article, thanks for doing the research, it is truly helpful!!!
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New Multi‑Lab COA Deep Dive: Why Test Results Vary Between Labs
We just published a new breakdown on a multi‑lab retatrutide test that should be interesting for anyone who actually reads COAs instead of just the bold numbers.
In this run, the same "Uncle Wang" Retatrutide 10 mg kit from Nexaph was tested by six different labs: AFI, Freedom Diagnostics, Janoshik (vendor and third‑party), TrustPointe Analytics, and Vanguard Laboratory. The labs all agreed on the big picture: identity confirmed as retatrutide and very high purity (roughly 99.7–99.9%+ depending on the report).
Where things got spicy was the mass / net content. Reported content ranged from about 10.18 mg up to 12.80 mg per vial, with some labs clustering low (AFI, Vanguard) and others higher (Freedom, TrustPointe, Janoshik). Instead of treating that spread as “who’s lying,” we walk through why those numbers can legitimately differ across methods, calibration curves, sample prep, vial selection, and how each lab defines and calculates content.
https://peptidecritic.com/blog/why-test-results-vary-between-labs-multi-lab-coa-comparison
@Randy Being in this space has taught me so much about “all things researching peptides “. I am grateful for the Youtube videos also which brought me here. I had to look in my freezer after reading all the COA’s on the Reta. Coincidentally, I just purchased that same green crimp ring with the transparent purple cap of a 10mg kit of Reta from Nexaph. Oh yes, and found Nexaph on this space too. Thanks Jeff/Randy
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@hectoraponte Unc Wang only does limited runs of 10 bottles at a time...or i bought a sticker maker.
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@Randy where can i get “wangs peptides” for randys nephew?
@hectoraponte said in Lab vs Lab, We tested 5 Labs using the same Kit.:
@Randy where can i get “wangs peptides” for randys nephew?
Same!!!
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@hectoraponte Unc Wang only does limited runs of 10 bottles at a time...or i bought a sticker maker.
Thank you randy!
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@beachfun We have a second kit of this we are using for some other degridation tests. Lio'd on a windowsill, in the fridge and in the glove box of my truck. Check back in 3 months.
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I just watched a video that said the true way to test if a product is what it actually is sold as is to have it tested with Liquid Chromatography-Mass Spectrometer (LC-MS) to actually tell if it actually the correct peptide. I thought that is what a purity test covered, but looking at this image above, I guess I am wrong.
What vendors are tested like that and what testing labs are actually using this? I see Freedom might be, if I am reading that right.
I apologies in advance, new to COA process and trying to learn more on it.
video that I randomly came across:
https://youtu.be/lHUOLJHiJzA?si=9P0QJVayqogka9fc&t=488@rogerp thanks for posting this -- did you find an LC-MS lab?
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@rogerp thanks for posting this -- did you find an LC-MS lab?
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@randy Do you think kits are ever mixed?
I have the mind set that it’s just business and people in china are doing the right thing… I still pin it anyway@jimmy4407th what do you mean, mixed?
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@jimmy4407th what do you mean, mixed?
@Randy I should have clarified. Different patches in one kit.
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So how do you determine your mass to use if it varies from different vendor?
I recently had GHK-CU 50mg order. The vendor COA (Jano) had two vials. 54.84 and 55.22. The second party vendor paid COA (Jano) came back at 54.83, 52.31, and 53.24. Close to the first but just a slightly lower average. The 3rd party COA (Trustpointe) came back a fair amount lower at 51.280 and 50.735. Are you still taking an average of all vials to use as your vial's mass for reconstituion?
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