Health Library topic
Thyroid Health
Full thyroid panels — Free T3, Free T4, Reverse T3, and antibodies — plus optimal versus normal ranges.
Biomarker guide
Ferritin
Ferritin reflects stored iron — and it is one of the clearest examples of a marker where being technically in range and being adequate are not the same thing.
Biomarker guide
Free T3
TSH is a pituitary signal. Free T3 is the hormone actually doing the work in your cells — and the two do not always agree.
Article
Blood Tests for Women Over 40
The decade when hormones, thyroid, metabolism, and bone health all begin shifting at once — and the panel that makes those shifts visible.
Article
Normal Labs But You Don't Feel Well
Normal is a statistical statement about a population, not a clinical statement about you. Here is what a reference range actually represents — and what to do next.
Article
Perimenopause Blood Tests
Perimenopause can begin a decade before your final period, and hormone levels swing rather than simply fall. Testing well means testing the right markers at the right time.
Article
Thyroid Tests Beyond TSH
TSH is one signal from the pituitary. A complete thyroid assessment measures the hormones themselves, how well they convert, and whether your immune system is involved.
Article
Functional Medicine Blood Tests
Functional testing is not a different laboratory. It is a wider panel and a different interpretive standard — optimal ranges, pattern reading, and root-cause questions.