> Thyroid, TSH & Free T3 in Perimenopause

Thyroid markers (TSH, fT3, fT4) in perimenopause

A “normal” TSH does not describe conversion. These articles cover free T3 and free T4 in pmol/L, why the T4→T3 step is often the missing piece, and how thyroid function is associated with fatigue, hair changes and cognitive symptoms.

Thyroid Hair Loss in Women: Why Your TSH Can Be "Normal" — and You're Still Losing Hair — Your TSH came back normal. But your hair is still thinning. The answer lies not in TSH — but in how your thyroid hormones are converted, and what else is shifting at the same time.
Which Blood Tests for Hair Loss in Women? (And Why Most of Them Don't Help) — You've done the tests. Everything came back "normal." And yet — the hair keeps falling out. The problem isn't missing data. It's how that data is interpreted.
Which Blood Tests Should You Get During Perimenopause? — A practical guide to the most important lab markers for women in perimenopause and what your results actually mean.
Brain Fog in Perimenopause: Why You Feel Like a Different Person (and What's Actually Happening) — Brain fog in perimenopause is not a sign of decline — it is a sign of system change. Learn what actually causes it and why tracking patterns over time changes everything.
Low Ferritin: The Hidden Cause of Fatigue and Hair Loss in Women — Why your ferritin levels matter more than your hemoglobin – and what to do when your doctor says your iron is "fine".
Is My HRT Working? How to Tell If Your Hormone Therapy Is Dialled In — You started HRT — but how do you know it is actually working? Why a single blood value cannot tell you, and what to do when you barely feel a difference.