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c/coa·posted 4 months ago by u/dead_space_doug

anyone else notice batch kicking in around week 84

Explainer

Posting this because I searched for it and got nothing useful.

Setup: 1.7mg, week 10, injection-site soreness present but not ruining anything. I changed exactly one variable — water content — and tracked it for 11 weeks.

Result: a difference, but a small one, and well inside what I would call noise if someone else posted it. So I am putting it here rather than presenting it as a finding. If two or three other people have done the same thing we might actually learn something.

Not medical advice, obviously. This is one person with a spreadsheet.

0 up / 0 down47% upvoted4 commentsid ybdamm21 Mar 2026

4 comments

4 in this archive, depth 2

best — the order this archive was captured in

u/certified_referenceMOD7 points·4 months ago

Flair changed to match the content. Read the sidebar before posting next time and we are square.

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u/andres_restrepo-22 points·4 months ago

Yeah, 96.8% area is not the problem, the missing impurity breakdown is the problem.

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u/valeria_karlsen4 points·4 months ago

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

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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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Independent HPLC and mass spec. The number you get is the number they found.

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