Ferritin for Hair Loss: What Level Really Matters

Ferritin is a protein that stores iron in your body, and a ferritin blood test can help check whether low iron stores might be contributing to hair loss. Your ferritin levels can drop even before you develop anaemia, which is why some people experience low iron stores despite having normal haemoglobin levels. Several studies have linked low ferritin with increased hair shedding, but there is no single level that all doctors agree is ideal for hair growth. Some researchers consider ferritin below 40 ng/mL to be low in the context of hair loss (Olsen and colleagues), while others have suggested aiming closer to 70 ng/mL for women experiencing hair shedding (Rushton). These are research-based suggestions, not universal treatment targets. Your doctor will interpret your ferritin results alongside your symptoms and other blood tests.

What is ferritin, in plain words?

of iron in your body as money. Haemoglobin is the cash in your wallet, the iron you are using right now to carry oxygen in your blood. Ferritin is your savings account. It is a protein that binds iron and keeps it in store for later (MedlinePlus). When you lose a little more iron than you take in, month after month, your body quietly spends the savings first. It protects the wallet for as long as it can, because oxygen delivery is a priority. Hair growth is not. So the savings account can be close to empty while the wallet still looks fine.

Why can ferritin be low when haemoglobin is normal?

It's possible to have normal haemoglobin levels and still have low iron stores. This is something that can be easy to miss when reading a blood test report. For example, imagine these results from an Indian diagnostic lab:

• Haemoglobin: 12.4 g/dL (normal range: 12 to 15). The report marks it as normal.

• Serum ferritin: 11 ng/mL (lab range: approximately 10 to 150). This may also appear normal, even though it's very close to the lower limit.

These are example values, not results from a real patient.

Although both numbers may fall within the lab's reference ranges, a ferritin level of 11 ng/mL suggests very low iron stores. This is often called iron deficiency without anaemia, where your body is running low on stored iron before haemoglobin levels fall. A review published in the Journal of the American Academy of Dermatology explains why ferritin is useful when checking for iron deficiency in people experiencing hair loss. It also notes that ferritin can rise during infection or inflammation, sometimes hiding an underlying deficiency. The important thing is not to rely only on the word “normal” on your report. If you're experiencing noticeable hair shedding, ask your doctor to review your ferritin level alongside your haemoglobin, symptoms and other relevant tests.

How does low iron affect the hair cycle?

Each hair on your scalp runs its own cycle. It grows for a few years, rests for a few months, then falls out so a new hair can take its place. At any time, most of your hair is in the growing phase. Hair follicle cells divide quickly, so they need a steady supply of nutrients, iron among them. When stores are low, more hairs may slip early into the resting phase. Later, they shed together. This pattern is called telogen effluvium. You notice it as more hair on the pillow, in the comb and around the bathroom drain, spread across the whole scalp rather than in one bald patch. If you are unsure whether you are seeing shedding or snapped hair, our guide on hair shedding vs hair breakage helps you tell the two apart. Low ferritin has also been studied in female pattern hair loss, the slow widening of the parting that runs in families. Here the picture is less clear, as the next section shows.

What ferritin level really matters for hair?

The case for a higher target

A review by a hair researcher at the University of Portsmouth noted that the ferritin level to aim for in people with increased shedding was yet to be definitively established. It went on to recommend 70 micrograms per litre (the same as 70 ng/mL) along with a normal ESR, a blood marker of inflammation (Rushton, Clinical and Experimental Dermatology). This is the source of the "aim for 70" advice some dermatologists still follow.

The case for caution

A controlled study at Duke University compared 381 white American women with female pattern hair loss or chronic telogen effluvium against 76 women with no hair loss. Using a cut-off of 40 or below, low iron stores were found in 58.8% of the 170 premenopausal women with pattern hair loss and in 72.3% of the 47 premenopausal women without any hair loss. The authors concluded that low iron stores are common in women but were not more common in those with hair loss (Olsen and colleagues, Journal of the American Academy of Dermatology). The Cleveland Clinic review said its own clinic screens hair loss patients for iron deficiency, because they believe hair treatment goes better when low iron is corrected. They state openly that this practice is not evidence based in itself (Trost and colleagues).

What this means for you

There is no magic number. A very low ferritin, such as a single-digit value, needs attention. Some hair studies count anything up to 40 as low stores, so some doctors will act on a level in that range if you are shedding. A level near 70 is a target some specialists use, not a pass mark set in stone. Your doctor will read the number alongside your haemoglobin, your diet, your periods and how your hair looks under the dermatoscope.

Why is low ferritin so common in Indian women?

Low iron levels are common among Indian women experiencing hair loss. In a Chandigarh hospital study involving 100 women with widespread hair shedding, 57% had low haemoglobin, while 20% had ferritin levels below 10 ng/mL, indicating very low iron stores.

Several everyday habits and health factors can contribute to low iron levels:

• A vegetarian diet: Foods such as dal, beans and leafy greens contain iron, but the body absorbs this type less easily than iron from meat or fish, according to MedlinePlus.

• Tea with meals: Black tea contains compounds that reduce iron absorption. Drinking chai with or immediately after meals can make it harder for your body to absorb iron from foods like dal and palak.

• Heavy periods: Losing a lot of blood every month can gradually reduce your iron stores. Menstrual blood loss is a common cause of iron deficiency in women before menopause.

• Pregnancy and breastfeeding: Iron needs increase during pregnancy, and some women may have low iron stores after delivery, especially if they lost blood during childbirth.

• Crash dieting: Skipping meals or following a very restrictive diet can leave you short of iron and other nutrients needed for healthy hair growth.

Also read: Hair Fall After Weight Loss: Why It Happens and What Helps.

If you're experiencing hair shedding along with tiredness, breathlessness or other symptoms of low iron, speak to your doctor about getting tested.

How do you get tested for ferritin?

Ask your doctor for a serum ferritin test along with a complete blood count. Your doctor will decide whether you need other tests, for example, a check for inflammation, which can push ferritin up. A few practical tips for the report:

• Look at the actual number, not just whether it is flagged.

• Note the date. If you had a fever or infection recently, ferritin may read higher than your true stores.

What should you eat to raise ferritin?

If your iron stores are slightly low, eating more iron-rich foods is a good place to start, alongside your doctor's advice. There are plenty of everyday Indian foods that provide iron, including:

• Pulses and beans: Rajma, chana, chole and masoor dal.

• Leafy vegetables: Palak, methi and amaranth leaves.

• Millets: Ragi, bajra and jowar.

• Nuts, seeds and dried fruits: Sesame seeds (til), raisins and dates.

• Non-vegetarian foods: Eggs, fish, chicken and mutton.

You can also enjoy jaggery in small amounts, but don't rely on it as a major source of iron.

How you combine these foods matters too. Vitamin C helps your body absorb more iron from plant foods, as MedlinePlus explains. Try squeezing lemon over your chana, adding tomatoes to dal or having an amla or guava with lunch. Also, avoid drinking chai with your main meals, as tea can reduce iron absorption. These small changes can help improve your iron intake, although a confirmed iron deficiency may still need supplements or other treatment prescribed by your doctor.

Should you take iron tablets on your own?

Do not start iron tablets on your own. Iron is one supplement where more is not better. The NHS says side effects of high doses (over 20 mg) include constipation, feeling sick, being sick and stomach pain. The NHS adds that very high doses of iron can be fatal, particularly if taken by children, so always keep iron supplements out of the reach of children (NHS). Excessive iron can also cause iron overload, which is a particular risk for people with a genetic condition called haemochromatosis (Trost and colleagues). Low ferritin in a man or a woman after menopause can also point to hidden blood loss from the gut, which needs a doctor's attention rather than a tablet (Trost and colleagues). If your doctor does prescribe iron, they will set the dose, the duration and when to recheck ferritin. Our article on whether hair growth supplements work explains how to judge any hair product sensibly.

How long before hair grows back?

Be patient with yourself here. Once iron stores start to recover, the follicles first need to move back into the growing phase. Then the new hair has to grow long enough to see. You may notice less shedding before you notice more hair. Ask your doctor when to repeat the ferritin test and judge progress together at each recheck.

Is there a role for lysine?

The same Portsmouth review described l-lysine, an essential amino acid that your body cannot make, as appearing to be important in hair loss. It reported that double-blind data confirmed an open study in women with increased hair shedding, in which a significant proportion responded to l-lysine and iron therapy (Rushton). Iron-rich meals, the right pairings and steady sleep remain the base of healthy hair.

When should you see a dermatologist?

The NHS advises seeing a doctor if you are worried about your hair loss. It also advises seeing a doctor to find out what is causing it before going to a commercial hair clinic. A dermatologist can look at the scalp closely, separate shedding from pattern hair loss and order the right tests. Our guide to hair loss in women walks through the other causes they will consider. That small number at the bottom of your blood report may be the clue your comb has been trying to give you. Read it, ask about it and give your hair the time it needs to answer back.

Sources

• Nutritional factors and hair loss (Clinical and Experimental Dermatology, 2002)

• The diagnosis and treatment of iron deficiency and its potential relationship to hair loss (Journal of the American Academy of Dermatology, 2006)

• Iron deficiency in female pattern hair loss, chronic telogen effluvium and control groups (Journal of the American Academy of Dermatology, 2010)

• Nonscarring diffuse hair loss in women: a clinico-etiological study from North-West India (Journal of Cosmetic Dermatology, 2019)

• Ferritin blood test (MedlinePlus)

• Iron in diet (MedlinePlus)

• Iron: vitamins and minerals (NHS)

Medical Disclaimer: This article is for general information and is not a substitute for advice from your doctor. Speak to a qualified healthcare professional before starting any supplement, especially if you are pregnant, breastfeeding or taking medication.