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.
- Blood Work for Perimenopause: Which Blood Tests to Get, and When — Which blood tests to ask for in perimenopause, which cycle day to draw them on, 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.
- Heart palpitations in perimenopause: causes and context — Racing heart, skipped beats, restlessness out of nowhere. What drives palpitations hormonally, which labs give context, and when a racing heart needs medical review.
- Constant Fatigue in Perimenopause: When Sleep Stops Restoring You — Eight hours of sleep and still exhausted. Why fatigue in perimenopause rarely has one cause, which five values you should know, and how to tell exhaustion from sleep debt.