Iron-deficiency anemia in Black women: causes, symptoms, and the fibroid link

Your body uses iron to build hemoglobin, the protein in red blood cells that carries oxygen. When iron runs low, you make fewer healthy red blood cells and your tissues get less oxygen. That is iron-deficiency anemia.

It develops in stages. First your stored iron drops while your blood counts still look normal. Then red blood cell production starts to suffer. Only later does the full anemia show up on a standard blood count. This matters because you can feel exhausted from low iron well before a routine test flags you as anemic.

The most common symptom is fatigue, the kind that sleep does not fix. Other signs include dizziness or lightheadedness, cold hands and feet, and shortness of breath or chest pain as the deficiency gets more severe.

Iron deficiency also produces signs that are easy to dismiss: hair shedding (alopecia), a sore or smooth tongue, cracks at the corners of the mouth, and brittle nails that in chronic cases curve upward into a spoon shape (koilonychia). A telling one is pica, a craving to eat non-food substances such as ice, dirt, starch, or paint. The ice-craving form, pagophagia, is strongly tied to iron deficiency and tends to disappear within days to weeks of starting iron, often before blood counts fully recover. If you find yourself crunching ice all day, take it seriously.

Pallor is a real sign, but the advice to "look for pale skin" was written for light skin. On brown and dark skin, color change does not show reliably on the face. Check the places where the tissue is thin and the small blood vessels show through: the inside of the lower eyelids (the conjunctiva), the palms of the hands, the nail beds, and the gums. When iron is low, those surfaces look washed out rather than pink or red. This is the practical way to read pallor on yourself or a family member with darker skin.

Iron deficiency affects up to 12 percent of reproductive-aged American women, and about 4 percent have iron-deficiency anemia. Among African-American women the rates are higher, and heavy menstrual bleeding is a major reason. One study of premenopausal African-American women put it plainly: this group has higher rates of heavy menstrual bleeding and a higher prevalence of both iron deficiency and iron-deficiency anemia than white women.

Heavy periods are the connection, and fibroids are the most common cause of heavy periods. Uterine fibroids are benign growths in the muscle of the uterus, and they are extremely common: 50 to 70 percent of women develop them by menopause, with rates reaching over 80 percent in Black women. Black women also tend to develop fibroids younger, present with larger uteruses, and are more likely to suffer blood-loss anemia than white women. You can read the full picture in our guide to fibroids in Black women.

The mechanism is simple. Heavy bleeding loses iron month after month, faster than diet can replace it, and the stores run dry. Blood loss from heavy periods can lead to iron-deficiency anemia, and severe anemia can cause shortness of breath and raise the risk of heart problems. If you have been told your fatigue is "just stress," low iron from heavy bleeding is a concrete, testable explanation worth ruling in or out. Our piece on chronic fatigue in Black women walks through the other causes too.

Diagnosis starts with a complete blood count (CBC), which checks hemoglobin and red blood cell size, plus blood iron and ferritin levels. Ferritin reflects your stored iron, and a low ferritin is the most specific sign of iron deficiency. A level under 30 ng/mL is specific for iron deficiency. Major specialty groups support using a ferritin under 45 ng/mL to diagnose iron-deficiency anemia.

Here is the trap. Ferritin is an acute-phase reactant, which means it rises with inflammation, infection, and chronic illness. When inflammation is present, your ferritin can read normal even though your iron is genuinely low. In that setting, a ferritin up to 100 ng/mL can still be compatible with iron deficiency. So a "normal" ferritin does not always rule out a deficiency. If you have symptoms and a normal ferritin, ask your clinician whether inflammation could be masking the result and whether further iron studies are warranted.

• CBC with hemoglobin and red cell indices (MCV)
• Serum ferritin, read in light of any inflammation
• Serum iron and transferrin saturation if ferritin is borderline
• A workup for the source of blood loss, including a pelvic evaluation for fibroids if your periods are heavy

Treat the iron deficiency. Oral iron is the usual first step and is effective, though it can take three to six months to rebuild your stores. How you take it matters. A common approach is a single dose such as 65 mg of elemental iron, taken every other day rather than multiple times a day, which improves absorption and is gentler on the stomach. Taking it with vitamin C, for example 500 mg or a glass of orange juice, helps your body absorb the iron.

Use IV iron when oral iron is not enough. Intravenous iron delivers iron directly into a vein and often restores levels in one or a few sessions. It is used for people who cannot tolerate oral iron, who are not absorbing it, who have severe anemia, or who have ongoing heavy losses.

Treat the cause of the bleeding. Replacing iron without stopping the blood loss means the deficiency comes back. Heavy menstrual bleeding from fibroids can often be managed with hormonal birth control methods that lighten or stop the flow, and there are procedural and surgical options for fibroids themselves. An ob-gyn can match the treatment to your situation. To find one, search our provider directory.

See a clinician promptly, not eventually, if you have:

• Shortness of breath or chest pain, which can signal severe anemia
• Bleeding that soaks through a pad or tampon every hour for several hours, lasts more than 7 days, or includes clots the size of a quarter or larger
• Fainting, a racing heart, or new severe fatigue that limits daily activity

Severe anemia can cause shortness of breath and increase the risk of heart problems, and untreated iron-deficiency anemia can lead to serious complications, so do not wait it out.