[Lab] split one vial across VendorInvestigate and PeptideMeter — 98.0% and 97.9%
Confession thread, sort of.
I went from 0.25mg to 10mg much faster than I should have because the scale had stalled and I got impatient. The stall broke about 24 weeks later, at which point I had no way of knowing whether the dose increase did anything or whether it would have broken anyway.
So now I have early fullness I did not need and a data point I cannot interpret. Two lessons in one.
Posting it in the hope that somebody at week 23 reads it before doing the same thing.
best — the order this archive was captured in
redact your own name, not the vendor's batch details
the batch number or it did not happen
Inter-lab variance on this kind of assay is routinely 1–2 points. Different column, different gradient, different integration.
post the whole document, not the headline number
Strongly agree. Mass% and area% are answering different questions on the same document.
Metadata check caught a COA that was created in a browser four months after the analysis date. Not evidence of fraud, but worth flagging to KP.
The confident tone is doing a lot of work that the evidence is not.
Tested the GLB raw material and a reseller vial side-by-side. Same purity claim, different impurity profiles. Handling matters.
Strongly agree. Mass% and area% are answering different questions on the same document.
This is an urgent-care question wearing a forum question's clothes. Please contact a clinician rather than waiting for replies.
Disagree. What you are describing is consistent with certificate of analysis, not with what you concluded.
This is an urgent-care question wearing a forum question's clothes.
Adding to this: purity is doing more work than the comment implies.
purity and net content are two different numbers, same vial
Water content on the document? That affects your concentration math.
Four months on the site and I was confusing area% and mass% in every post I made. One explainer thread and it clicked.
area% is not mass%, and here is exactly why it matters
That is net peptide content, not purity. Different number, different meaning.
the related substances line is where the story is
Four months on the site and I was confusing area% and mass% in every post I made.
Counter-anecdote: opposite result, same dose. Which mostly tells us the variance is huge.
- 1Inter-lab variance on this kind of assay is routinely 1–2 points. Different…6 comments in this branch · started by u/aurel_boateng
- 2Four months on the site and I was confusing area% and mass% in every post I…5 comments in this branch · started by u/dead_space_doug