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c/coa·posted 6 months ago by u/soren_zamora

[Lab] SGN BPC — VendorInvestigate came back 93.7% against a claimed 94.2%

Lab Slow Clap ×3 Receipts ×2 Clean Column ×1

Genuinely asking, not being difficult.

Everyone in c/scamalerts repeats that COA is important. I believe it, but I have never seen anyone show why, and when I search I get 12 threads of people agreeing with each other.

Is there a paper? Is there a measurement? Or is this one of those things that is true because it has been repeated since 2023?

I am not trying to be the "source?" guy. I would just like a source.

11,449 up / 4,190 down73% upvoted47 commentsid z5f97i23 Jan 2026

47 comments

30 in this archive, depth 5

best — the order this archive was captured in

u/laila_yilmaz1.6k points·6 months ago

Half-life is about 168 hours, so steady state lands around week 6–5. Practical consequence: what you feel in week 1 is not what that dose does.

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u/stablecoin_steve1.3k points·6 months ago

no "is this good?" without saying what the compound and claimed purity are

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u/fatima_wojcik384 points·6 months ago

Half-life is about 168 hours, so steady state lands around week 6–5.

Counter-anecdote: opposite result, same dose. Which mostly tells us the variance is huge.

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u/aleksi_eriksen-7 points·6 months ago

axis labels included, always

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u/elodie_yilmaz-8 points·6 months ago

Cosigning. The batch number is load-bearing information.

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u/soren_zamoraOP1 point·6 months ago

no "is this good?" without saying what the compound and claimed purity are

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u/sunday_shot_sal1 point·6 months ago

Cosigning. The batch number is load-bearing information.

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u/soren_zamoraOP704 points·6 months ago

Asked WXT for the batch-specific COA and they sent it within six hours, full document, batch number, date, everything. That is the baseline.

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u/sig_figs_sammod · analytical244 points·6 months ago

the related substances line is where the story is

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u/amylin_amyamylin130 points·6 months ago

redact your own name, not the vendor's batch details

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u/fatima_wojcik908 points·6 months ago

area% is not mass%, and here is exactly why it matters

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u/soren_zamoraOP0 points·6 months ago

redact your own name, not the vendor's batch details

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u/andres_restrepo0 points·6 months ago

redact your own name, not the vendor's batch details

Disagree on that part. 98.4% and 98.3% on the same vial is normal.

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u/foam_head_fred1.1k points·6 months ago
it is in the wiki actually
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u/wrong_network_w718 points·6 months ago·edited
i do not know. that is the honest answer.
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u/liv_nkemelu530 points·6 months ago

purity and net content are two different numbers, same vial

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u/coa_collectorMOD309 points·6 months ago

This is an urgent-care question wearing a forum question's clothes. Please contact a clinician rather than waiting for replies.

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u/first_hundred364 points·6 months ago

the counterion is part of the mass you paid for

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u/dead_space_doug200 points·6 months ago

purity and net content are two different numbers, same vial

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u/ghrp_history140 points·6 months ago

Water content on the document? That affects your concentration math.

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u/tidy_vialdrawer_watch28241 points·6 months ago

redact your own name, not the vendor's batch details

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u/marisol_frisk292 points·6 months ago·edited

Respectfully this is a sample of one presented as a finding.

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u/yusuf_nakamura226 points·6 months ago
i changed my mind reading this, which never happens
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u/isabela_nilsen93 points·6 months ago

Water content on the document? That affects your concentration math.

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u/emil_agyeman135 points·6 months ago

redact your own name, not the vendor's batch details

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u/coa_janitormod · c/coa160 points·6 months ago

area% is not mass%, and here is exactly why it matters

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u/sofia_danquah85 points·6 months ago

What is the method line say? Not the technique, the actual method.

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u/tidy_vialdrawer_watch28101 points·6 months ago

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 Homopeptide.

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u/anecdata_annie146 points·6 months ago

chromatogram or it did not happen

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About c/coa

How to read a certificate of analysis and what it does and does not tell you. Area% versus mass%, identity versus quantity, water content, related substances, acetate counterions, and the difference between a vendor-supplied COA and an independent test on the vial you actually received.

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  1. Post the full document. Cropped COAs that hide the batch number or date get removed.
  2. Redact your own name and order id, not the vendor's batch details.
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