There Is No Single Best Biomarker Blood Test
What biomarker labs measure, why panel size is a poor proxy for quality, and how to build a blood panel you can reason about over time.
Tag: longitudinal-data
6 posts
What a Blood Test Can and Cannot Tell You About Your Health
A blood panel measures a few dozen analytes in one tube at one moment. Here is what that covers, why single results mislead, and how to store and analyze your own results over time.
What blood tests are worth running if you train hard, and how to read them
A blood panel for athletes and the timing rules that make its numbers interpretable. Covers reference change arithmetic and exporting lab data.
Blood Tests During Menstruation: What Changes and What Doesn't
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.
What a Biomarker Testing Service Can and Cannot Tell You
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.
How Often Should You Draw Blood? Monthly Is Fine, But Most Markers Don't Move That Fast
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.