Tag: measurement

What a blood biomarker test measures, what it costs, how to get the numbers out in a form you can compute on, and the math that tells you whether a change between two draws is real.

A direct look at what a maximal blood panel contains, which assays add real information, where the marketing exceeds the biology, and how to get the raw data in a form you can analyze yourself.

An essay prompted by Carolyn Bertozzi's lecture on bioorthogonal chemistry: what the reactions are, the second-order rate constants that decide what can be imaged in a living animal, and why the glycome is still a missing data layer in most molecular profiles.

What quantum mechanics says about measurement, where observer and observed are genuinely coupled in biology, and why a longitudinal personal dataset has to account for the effect of measuring on the person measured.

The Sinclair-associated biological age test is a buccal DNA methylation clock. Here is what methylation clocks measure, how noisy they are, and how to get data you can analyze yourself.