4 posts
A specific panel for athletes, the timing rules that make the numbers interpretable, the reference-change arithmetic that tells you when a shift is real, and how to get the data out of the lab in a computable form.
You can draw blood on any cycle day. The question is which analytes move with cycle phase, how much, and how to record the phase so your own longitudinal data stays interpretable.
A technical guide to choosing and using a biomarker testing service: what analytes are worth measuring, what the analytical error looks like, how to store and version the results, and where a clinician has to be involved.
Monthly blood work is physiologically safe for almost everyone, but most analytes change slower than the noise floor of the assay. Here is how to pick a testing interval per marker, standardize the draw, and detect real change in your own data.