10/17/2026
If you're standing in the shower watching more hair than usual go down the drain, and every lab you've had comes back fine, you're not imagining it.
There are usually three things behind this that a standard panel doesn't catch: low-normal ferritin (your iron reserve, with a normal range that starts lower than what your hair actually needs), a TSH that looks fine while the active thyroid hormone your follicles use is still low, and the hormone shift of perimenopause itself, which can thin hair as estrogen drops and shifts its balance with your other hormones.
Your labs can come back normal, and you can still be watching your hair fall out.