Seeking Optimal Journal
Practical, evidence-aware articles from Brent Cosnett on health, nutrition, and sustainable performance.
Being 'in range' answers one narrow question. It doesn't prove your body works well. Here's what a reference range means and why symptoms sit inside it.
blood testsfunctional rangesreference rangesfatiguethyroidnutrient deficienciesHashimoto's is a thyroid diagnosis, but the gut is often part of the picture. What the evidence supports, what it doesn't, and how the drivers get assessed.
Hashimoto'sthyroidgut healthautoimmunityintestinal permeabilitySIBOSIBO relapse is common because treatment lowers the bacteria without fixing what let them grow. Here's what actually drives recurrence, and how to prevent it.
SIBOgut motilitydigestive healthrelapse preventionmicrobiome