unpopular opinion: most of what gets said here about bloodwork is guesswork
unpopular opinion: most of what gets said here about bloodwork is guesswork. I have gone back and forth on this for months. Different laboratories use different assay platforms with different calibration. Comparing across labs adds a systematic offset that is invisible on the report. Reference intervals are typically…
Cosigning on baseline. The panel I regret most is the one I did not take before starting.
How many weeks between the two measurements?
That is a non-fasting value and the interval you are comparing it against is a fasting one.
Correction: that marker is reported in different units by different labs, which explains the tenfold difference you are seeing.
Small fix — a reference interval is not a treatment target, and the post above uses them interchangeably.
one measurement is a point, two is a line, three is a trend
Right, and weight loss itself moves several markers, so attribution is harder than these threads assume.
Yes — same lab, same fasting state, same rough time of day, or the comparison is doing nothing.
Time of day, fasting state, hydration and recent exercise all move common markers. Standardising the draw conditions is free and it removes most of the apparent variability.