Less than 1% of commercial lab blood panels ordered through Quest Diagnostics include fasting insulin measurement.
"I was talking to the lab director at Quest Laboratories. He said, "What percent of your tests you get to come in are measuring insulin, which is, I think, one of the most important things you need to know about your biomarkers?" And he was like, "Less than 1%."" (said at 0:52:29)
No published record matching the claim that less than 1% of commercial lab blood panels ordered through Quest Diagnostics include fasting insulin measurement was located; this does not prove the claim false. The claim describes an informal conversation with an unnamed laboratory director, and official commercial laboratory order volume statistics for routine fasting insulin testing have not been published in the peer-reviewed medical literature.