Question 1

Can low ferritin cause hair loss even if hemoglobin is normal?

Accepted Answer

Yes. Hair follicles are among the most metabolically active cells in the body. When ferritin drops below 30–50 ng/mL, the body redirects iron to essential functions, and hair growth is deprioritized — even when hemoglobin remains in the normal range. But ferritin is only one piece of the puzzle: thyroid function and hormonal status influence how efficiently your body uses the iron it has. This is one of the most common missed diagnoses in women's health.

Question 2

How long does it take for ferritin to improve with supplements?

Accepted Answer

Typically 3–6 months of consistent supplementation — but the response varies significantly between women and depends on absorption, the form of iron used, and whether the underlying cause is being addressed. Hair regrowth may take 6–12 months after ferritin reaches optimal levels. Tracking the trend over time is more meaningful than any single retest.

Question 3

Which iron supplement is best absorbed?

Accepted Answer

There are several forms — chelated forms tend to be better tolerated, but the best choice depends on your individual situation, gut health, and other medications. Ask your doctor or pharmacist for a recommendation tailored to you.

Question 4

Why does PeriTrack use different ferritin ranges than my lab?

Accepted Answer

Standard lab ranges (often 10–200 ng/mL) define “not anemic” — not “optimal.” Research shows symptoms begin well above the lower cutoff. PeriTrack uses evidence-based optimal ranges and interprets your ferritin in context of your other markers — because whether a specific level is adequate for you depends on more than just the number itself.