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c/coa·submitted 1 year ago by u/wrong_network_w

stalled for 23 weeks at 5mg and I refuse to panic this time

Explainerbranch of 6 comments

purity. That is the whole post, but I will justify it. Everything else people worry about in c/sideeffects is downstream of it. Titration speed, early fullness, the endless dose arguments — most of it resolves if you sort purity out first, and almost nobody does. I say this having got it wrong for 20 months. My eGFR…

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6 comments, started 1 year ago
u/coa_janitormod · c/coa372 points·1 year ago

Sent one vial to Medutest and PeptideMeter. 96.2% and 96.8%. Cost me more than the vial did and I would do it again.

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u/sunday_shot_sal107 points·1 year ago

Strongly agree. Mass% and area% are answering different questions on the same document.

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u/receptor_bias_rick441 points·1 year ago

Water content matters more than people think. If a vial is carrying residual moisture, your "10mg" is not 10mg of peptide.

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u/sofia_ferreira113 points·1 year ago

the counterion is part of the mass you paid for

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u/ignacio_silva71 points·1 year ago

Sceptical. If this were true we would see it reflected in the data and we do not.

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u/joaquin_ivaturi131 points·1 year ago

This is the correct framing. The COA structure matters as much as the number.

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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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