Blood tests and hair loss: what may actually help
Iron, thyroid, and more — when tests are useful, and why your panel may differ from someone else’s.
Same hair worry, different labs — when iron, thyroid, and others actually change your care.
Insights hub
Blood markers
How common blood tests relate to hair biology and when results merit discussion with your clinician.
Ferritin and hair loss: what your result can and can’t tell you
One lab value for stored iron — helpful in context, not a full diagnosis of why hair is shedding.
Low ferritin can matter for shedding — not a DIY iron prescription. Basics before you supplement.
Thyroid and hair loss: what patients should know
Under- or overactive thyroid can change shedding or texture — and “normal” TSH still leaves other causes on the table.
What TSH and related tests are for — and when shedding continues despite normal labs.
Vitamin D, B12, and folate: what labs may mean for hair
D, B12, folate — what labs can and cannot explain about shedding or thinning.
Before every “hair vitamin,” how D, B12, and folate fit a sensible check-up with your doctor.