Adding the clinical framing, because it changes how the question reads. The mechanism and the magnitude are separate questions. Agreeing that something happens says nothing about whether it happens enough to act on.
Worth separating that from compounded supply, which this thread keeps folding into the same question. They behave differently and the advice does not transfer.
LabKate said:Two things anyone can check: a state licence number for a 503A, and an FDA outsourcing-facility registration for a 503B.
Agreed, and the enforcement dates were staggered by category — 503A first, 503B a few weeks later — because outsourcing facilities have manufactured inventory and clinic contracts to unwind while a 503A makes to order.
LabKate said:Two things anyone can check: a state licence number for a 503A, and an FDA outsourcing-facility registration for a 503B.
Saving this. It is the first explanation that did not require me to already understand it. Taking it to my next appointment.
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Browse GL BiochemClinical perspective, offered as context rather than as advice. Most of what circulates confidently in this community traces back to one summary of one study, and the qualifier was dropped somewhere in the third retelling.
Ask again with the specifics and you will get a better answer than this one.
Moderator note: good thread. Keeping it here rather than moving it, because the question is general enough to be useful. Carry on.