Low Ferritin and Hair Loss in Women
What the Research Shows, and Where Compounding Fits
Medically reviewed by Beth Jenks, Pharm.D. · September 16, 2026
If you have noticed more hair in your brush or the shower drain, you may have seen the advice to check your ferritin. It is a good question to bring to your prescriber. Here is what ferritin is, what the research shows about it and hair shedding, and how a compounding pharmacy can help once your prescriber has a plan.
What Ferritin Is
Ferritin is the protein your body uses to store iron. A ferritin blood test gives your prescriber an estimate of how much iron you have in reserve.
That is different from a standard blood count, which mostly reflects the iron already in use. Iron stores can run low before a blood count changes, which is why prescribers often look at ferritin on its own when someone mentions shedding.
Hair growth is sensitive to changes elsewhere in the body, and shedding often has more than one cause. Alongside iron, prescribers commonly look at thyroid function, vitamin D, recent illness or stress, hormonal changes and medications. You can see the full list of labs our pharmacists suggest on our suggested labs page.
What the Research Shows
A 2025 study of 100 women found that those with telogen effluvium — the diffuse, all-over shedding that happens when more hairs than usual move into their resting phase — had average ferritin levels roughly half those of women without shedding. More than a quarter of the women who were shedding had ferritin levels considered low, compared with none of the women in the comparison group.
Why Optimal Ferritin Matters
Iron does a lot of work in the body. It helps carry oxygen in the blood, and it supports hair follicles, which contain some of the fastest-dividing cells in the body.
When iron stores run low, the body is thought to direct what it has toward essential functions first, and hair growth is not at the top of that list. That is one reason shedding can show up before other signs of low iron.
What we see in clinical practice is that iron stores are easy to overlook. A result inside a lab's standard reference range is not always where a prescriber wants it for a woman who is shedding, which is why many prescribers look for ferritin that is optimal, not just "normal."
Your prescriber decides what optimal looks like for you, the best way to get there, and when to recheck.
How We Can Help
Shedding is stressful, and we are glad to help. Once your prescriber has a plan, we can support both sides of it — your iron and your hair.
Iron supplements, in stock
We carry several reputable brands of over-the-counter iron supplements. Iron comes in different forms, and some people tolerate one better than another, so ask your prescriber which is right for you — then give us a call to see what we have on the shelf.
Call 423-975-0597Hair preparations made for you
We compound topical and oral hair loss preparations to your prescriber's order, in the actives and strength they specify — for example minoxidil at a concentration that is not commercially manufactured, or several actives combined into one solution so your routine has fewer steps.
Explore our hair loss programMade around your sensitivities
If a standard product irritates your scalp, or you react to dyes or fillers, your prescriber can ask for a different base or a formula without them, and we will prepare it that way.
Quality you can check
Everything is made to order at our PCAB-accredited pharmacy in Johnson City, Tennessee, and a pharmacist reviews your formulation before it is made.
Wherever you live
We are licensed in all 50 states and the District of Columbia, with a 48-hour compounding time on most preparations. Shipping time is additional.
Already have a prescription?
Transfer it to us and we will take it from there.
Transfer a prescriptionClinics and practices can read about our hair loss fulfillment for their patients.
Frequently Asked Questions
What is ferritin?
Ferritin is the protein your body uses to store iron. A ferritin blood test is one way your prescriber can estimate your iron reserves.
Can low ferritin cause hair loss?
Research, including a 2025 study of 100 women, links low ferritin with increased shedding, particularly the diffuse shedding called telogen effluvium. Shedding can have more than one cause, so your prescriber looks at the whole picture.
My blood count was normal. Could my iron stores still be low?
It is possible. Ferritin reflects stored iron, and stores can be low while a standard blood count is still in range. Ask your prescriber whether a ferritin test makes sense for you.
What ferritin level is optimal for hair?
Many prescribers look for ferritin comfortably above the low end of a lab's standard range when a woman is shedding, rather than settling for "normal." Your prescriber decides what optimal looks like for you, based on your results and history.
Should I start an iron supplement?
Ask your prescriber first. They can recommend the right form and amount for you and recheck your levels, since too much iron can cause problems of its own. When you are ready, we carry several reputable over-the-counter brands.
What does ProCompounding prepare for hair loss?
We compound topical and oral hair loss preparations to your prescriber's order, in the actives and strength they specify. We do not prescribe, but our pharmacists are glad to talk with your prescriber about what is available.
Can you ship to my state?
We are licensed in all 50 states and the District of Columbia. We compound at our pharmacy in Johnson City, Tennessee and ship from there. We have a 48-hour compounding time on most preparations; shipping time is additional.
We're Here to Help
Iron Support and Hair Preparations, in One Place
Most iron support is available over the counter, and we carry several reputable brands. Ask your prescriber which form is right for you, then give us a call to see what we have on the shelf.
If your prescriber also recommends a compounded hair preparation, they can send it to us — our details are on our prescriber page — or you can transfer one you already have.
Questions? Call 423-975-0597.