how long do you keep the retained half of the sample
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#lab-requests 2026-04-16
Thursday26 messages5 participantstimes are UTC
Highlights from this day
- stack_sceptic — two labs on the same lot is a luxury but it is how we learned what inter-lab variance looks like 15:47
- month_six_me — a code and a lot number on the syringe in permanent marker. that is the whole labelling requirement 15:50
- a1c_lag — whats the current turnaround, last one took 12 days 16:17
chain of custody in hobby testing is weak and we say so in every writeup
queue is posted
do not send your only vial. that has happened twice and both times it hurt
do i send a syringe or the whole vial
two labs on the same lot is a luxury but it is how we learned what inter-lab variance looks like
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a code and a lot number on the syringe in permanent marker. that is the whole labelling requirement
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if you want to know about your vial, you have to submit your vial. that is the whole answer
we do not help with wording beyond that and the mods are strict about it
are we blinding this one or does the lab know the source
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how many people do we need before the split is worth it
including a reference standard in the batch is the single best thing we ever added to this process
whats the current turnaround, last one took 12 days
code compound submitted status
R-01 semaglutide 2026-02-14 reported
R-02 tirzepatide 2026-02-14 reported
R-03 retatrutide 2026-02-16 in queue
R-04 reference std 2026-02-16 reportedi would rather fund one careful quantity test than three purity tests
roughly one sample in 5 rounds has gone missing in transit. budget for it emotionally
code not name
how much sample does the lab need for purity plus quantity
send a capped syringe with enough for a rerun. the minimum is never enough if they need to repeat it
the queue is posted and updated. if your code is not on it, it did not arrive
thats the turnaround
blinded obviously
anyone want to co-fund a quantity test on a lot i already own
quantity is the test worth paying for. purity is usually fine and fill usually is not
a code and a lot number on the syringe in permanent marker. that is the whole labelling requirement
is there a preferred lab for quantity specifically
is it worth including a reference standard in the batch
update from 19 months ago: the blinding process is unchanged and it has held up fine
quantity is the test worth paying for. purity is usually fine and fill usually is not
we do not help with wording beyond that and the mods are strict about it, i think
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turnaround has been between 16 days and twice that depending on the queue