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c/coa·submitted 24 days ago by u/dead_space_doug

net peptide content vs purity — two different numbers, same vial

COAbranch of 8 comments

Week 11 update. 22kg down from the start, muscle cramps basically gone since about week 51. Things that worked: consistency, protein at breakfast, walking more than I want to. Things that did not: everything I bought on the internet to help with muscle cramps. The part that surprised me is how much of this is admin.…

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8 comments, started 23 days ago
u/nikhil_lindqvist74 points·23 days ago

chromatogram or it did not happen

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u/nikhil_lindqvist26 points·23 days ago

post the whole document, not the headline number

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u/first_hundred29 points·23 days ago

the method line is doing real work, not just window dressing

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[deleted]18 points·22 days ago

[deleted]

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u/aurel_boateng12 points·22 days ago

axis labels included, always

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u/dead_space_dougOP9 points·22 days ago

The chromatogram trace is where the real information lives. The summary number is just a headline.

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u/neha_erdogan9 points·22 days ago·edited

axis labels included, always

Yes, exactly this, and it is the bit that took me 54 weeks to accept.

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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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