I’d like to add onto this. A while back, I did a same day comparison with Quest and LabCorp. I had labs drawn within 30 minutes of each other. I had thought my batch from Colonial was also bad, but in reality it was Quest.
I still use Quest, but if I get a odd reading I get it re-tested. I’ve had blood results from Quest showing 1400 Total T on 150mg and 850 Total T when re-tested. I trust Colonial as they stand by their product and one of the only sources on here that get their products tested regularly.