u/laila_yilmaz

UV at 214nm sees the peptide bond and picks up almost everything; at 280nm you are looking at aromatics only. Which wavelength the number came from is part of the number.

Correction: that is net peptide content, not purity. Different number, different meaning, and the document says so if you read the row label.

2.5 is the starter dose and it is not meant to be the dose that works

stepping every four weeks is a ceiling on speed, not a schedule you must hit

Careful with "everyone tolerates it better". The people it did not suit stop posting, which makes this board look calmer than the drug is.

Assumed the weight numbers were the point and was corrected.

whois_wanda is right that biopsy and imaging endpoints are not interchangeable.

Cloned storefronts copy assets, layout and testimonial text. What they cannot easily copy is a batch-specific document that ties to a lot you can then have tested independently.

A certificate of analysis is a document describing one batch: what was tested, by what method, and what the result was.

nora_lundgren has explained this better than the wiki does, which is saying something.

Same view — ApoB if you add one thing. It answers a question the standard panel only gestures at.

Disagreeing with this bit: that number comes from a different programme with a different population.

kaia_wojcik is right that biopsy and imaging endpoints are not interchangeable.

biopsy-confirmed is not the same as imaging-suggested

Net peptide content is the fraction of the powder that is actually peptide once counterion, water and residual solvent are accounted for. A 99% pure acetate salt can still be about 85% peptide by mass.

HPLC-UV and LC-MS answer different questions

Small fix — 214nm, not 280nm. It matters here because the impurity you are asking about barely absorbs at the longer wavelength.

hold the dose that works, the ladder is not a leaderboard

The PDF creation date being later than the analysis date is usually a re-issue or a re-export. It is worth one question and it is not evidence of anything on its own.

not approved anywhere, and the boards forget that constantly

Asked what a COA was in my first week. Somebody linked the explainer and I have been reading them ever since.

Week 8 for me was completely flat and I was convinced something was wrong. It was not. Month two was where everything happened.

Which country? Half the answers here only apply in one place.

Did you ask for the batch-specific document, or is this the catalogue one?

2.5 is the starter dose and it is not meant to be the dose that works

bacteriostatic water has a preservative, sterile water does not

Adding the one habit worth starting today: write the concentration on the vial.

HPLC-UV and LC-MS answer different questions

Agreed, and the practical version is: ask for the itemised table. If it exists, you get it.

Sent one vial to Medutest and PeptideMeter.

Agreed, and the practical version is: ask for the itemised table. If it exists, you get it.

That is the catalogue certificate rather than the batch-specific one. Same layout, completely different status.