60% of Women with Hair Loss Had Low Ferritin, Researchers Propose 60ng/mL Threshold

If your blood work comes back saying “no anemia” yet you keep losing hair, ferritin deserves a closer look. Ferritin reflects stored iron levels, and hair follicles can suffer at concentrations well above the anemia cutoff (typically 12ng/mL).

Women with Hair Loss Had Ferritin 18ng/mL Lower Than Controls

A study published in a dermatology research journal found that women presenting with hair loss had average ferritin levels approximately 18ng/mL lower than the control group. Sixty percent of all hair loss patients fell below the 30~40ng/mL range. Since most laboratories set the normal lower limit at 12~15ng/mL, relying on that standard alone misses the iron levels needed for healthy hair.

Why 60ng/mL

The researchers proposed raising the ferritin target for hair health to 60ng/mL (with hemoglobin at or above 13g/dL). Hair follicle matrix cells are among the fastest-dividing cells in the human body. For them to maintain normal turnover, the enzyme ribonucleotide reductase, which is critical for DNA synthesis, needs to function at full capacity. Iron is that enzyme’s essential cofactor. Even without anemia, depleted iron stores can slow follicle cell division.

Starting Supplementation Within 6 Months Changes the Prognosis

Another key finding: participants who began iron supplementation within 6 months of hair loss onset had significantly better recovery outcomes than those who waited longer. The window matters because restoring nutrient supply before follicles fully enter the resting phase (telogen) is what gives them a chance to recover.

Is Iron Alone Enough?

Hair loss is rarely caused by a single factor. Checking thyroid function, vitamin D, and zinc alongside ferritin is recommended. Screening these four markers simultaneously can rule out a substantial portion of treatable causes. When choosing an iron supplement, bisglycinate is generally better tolerated and has higher bioavailability. Taking it with vitamin C boosts absorption, while calcium supplements, tea, and coffee should be separated by at least 2 hours. Monthly costs for iron supplements typically range from $8 to $25.

If your situation is “no anemia, but still shedding,” getting your ferritin checked is a practical first step.

Frequently Asked Questions

How can I get my ferritin tested? Ferritin is often not included in standard blood panels, so you may need to specifically request a serum ferritin test from your doctor or dermatologist. In most countries, the test costs between $20 and $50 without insurance.

If my ferritin is low, do I automatically need iron supplements? Finding the cause comes first. Heavy menstruation, dietary insufficiency, and gastrointestinal absorption issues each require different approaches. Iron supplements can cause constipation and stomach discomfort, so discuss the form (bisglycinate tends to be gentler) and dosing strategy with a healthcare provider.

What helps or hurts iron absorption? Taking iron with vitamin C improves absorption. Calcium supplements, tea, and coffee inhibit iron uptake, so spacing them at least 2 hours apart is recommended.