Biology Explained · July 7, 2026
Why a single hormone reading tells you less than you think
Pulsatile secretion, assay variation, and the difference between circulating concentration and receptor-level activity — three reasons a point measurement is a weak basis for interpretation.
Article pending publication
Being written
The distance between a mechanism and a result
A pathway shown in cultured cells establishes that something can happen. Most health claims live in the gap between that and a demonstrated effect in people — usually without anyone intending to mislead. This will walk through one example in full.
Covered now in Understanding Mechanisms vs Marketing, Level 2.
Being written
What the literature does not cover, and why it matters
Large parts of physiological research were built on male-dominant samples, then extended to women by assumption. The argument: when your experience doesn't match the extrapolation, the mismatch is evidence about the research, not about you.
The About page makes the short version of this case.
Being written
Metabolic flexibility, described carefully
The term has been used loosely enough to lose most of its meaning. What the underlying physiology actually refers to, how it's assessed, and why the assessment is harder than the confident usage suggests.
See Metabolism & Body Composition for the related titles.
Being written
Recovery is measured on the wrong timescale
Tissue remodelling runs over weeks. Subjective recovery gets judged over days. That mismatch quietly explains a great deal of self-tracking that looked like failure and wasn't.
See Inflammation & Repair.
Being written
Reading longevity research conservatively
Model organisms dominate this literature, and the distance between a worm and a woman is doing more work than most summaries admit. A framework for what transfers, what might, and what almost certainly doesn't.
See Mitochondria & Cellular Health.
Being written
How a title enters the library
The editorial process from the inside — including the drafts that came back, what failed, and why publishing more slowly turned out to matter more than we expected.
The process itself is documented on How We Create.
Being written
Additions to the learning pathways
What changed in the curriculum recently, and the reasoning behind each sequencing decision rather than just the result.
Current structure is on Learning Systems.