LibrarianMeg said:The useful move here is to separate what is established from what is widely repeated.
That holds where the measurement is reliable. Where it is noisy — and a lot of what gets tracked here is noisy — the same reasoning produces confident nonsense.
zoe_NC said:The absorption variability is real, but it partly averages out over weeks — the steady-state trough is less erratic than any single day would suggest.
Thank you for spelling out the reasoning rather than just the conclusion.
LibrarianMeg said:The useful move here is to separate what is established from what is widely repeated.
Pushing back on LibrarianMeg here. The counter-case has not been addressed. Somebody upthread described the situation that does not fit, and the thread moved on rather than engaging with it, which is the failure mode this board is supposed to avoid.
If somebody has the primary source to hand I would rather cite it than paraphrase it.
Sigma-Aldrich — Research-Grade Standards
Certified reference materials, analytical reagents, and research-grade standards for peptide verification. Trusted by laboratories worldwide.
Shop Reference StandardsThe figures, for anyone assembling their own picture. Worth stating the units and the reference range whenever you post a number here. A large fraction of the apparent disagreement in these threads is two people using different units and both being right.
I would rather be corrected than agreed with, if it comes to it.
Moderator note: a post naming a supplier has been edited. Discuss suppliers in the review sections, not here.