There is a single pattern the practice sees more often than any other in Nigerian women between the ages of twenty-five and fifty, and it is so consistent that it is now treated as a screening default rather than a working diagnosis. A woman arrives, generally referred for a second opinion, with eight years of unexplained fatigue. She has been told, across at least three previous clinicians, that the fatigue is stress. She has been told that it is her work schedule. She has been told that it is anaemia of pregnancy, except that her last delivery was four years ago. She has been told that her full blood count is normal. She has not, at any point in the eight years, had her ferritin measured.
Her ferritin, when it is finally measured, is 6 ng/mL.
This is not a rare presentation. It is — by every published audit of Nigerian women's health that has actually looked — the modal presentation, and it is the most under-acted-on screening result in the medicine of the Nigerian woman of reproductive age. The country sits inside the World Health Organization's highest-burden bracket for iron deficiency in women: somewhere between forty-five and sixty per cent of Nigerian women of reproductive age, in the most recent population surveys, have iron stores low enough to meet the international threshold for iron deficiency, and a meaningful additional fraction sits in the deficient-without-anaemia category that the standard full blood count cannot detect at all.
This piece is for the Nigerian woman whose fatigue has been a problem for years that nobody has named, and for the family member or partner of that woman who has watched the explanation cycle through "stress", "Lagos", "work", and "she just needs to rest" without anyone ordering the panel that would resolve it.
Why the standard test misses the diagnosis
The reason iron deficiency in Nigerian women is so consistently missed is mechanical and worth understanding, because it tells you exactly what to ask for next time you are at a clinic.
The standard test almost every Nigerian woman has had multiple times is the full blood count — the FBC. The FBC measures haemoglobin, red cell volume, and a small number of related parameters. The FBC will tell you if a woman is anaemic. It will not, until very late in the process, tell you if she is iron-deficient.
This distinction is the entire problem. Iron deficiency progresses through three stages, and the haemoglobin only falls in the third. In the first stage, iron stores in the body are being depleted but the haemoglobin is still normal because the body is robbing the storage pool to keep the blood numbers right. In the second stage, the storage pool is exhausted and the body begins to struggle to produce new red blood cells properly, but the haemoglobin is, often, still in the reference range. In the third stage, the haemoglobin finally falls, and the FBC finally shows the anaemia, and the woman is finally told there is a problem. Between the first stage and the third stage there can be years, sometimes a decade. The woman is symptomatic from somewhere in the early second stage. The FBC does not catch her until the third.
The test that catches the first and second stages — the test the Nigerian woman with eight years of fatigue almost certainly has not had — is the serum ferritin. Ferritin is the storage form of iron in the body. When iron stores are being depleted, ferritin falls first, long before the haemoglobin does. A ferritin of 6 ng/mL is severe iron deficiency. A ferritin of 15 is deficient. A ferritin of 30 to 50 is on the borderline at which most women are still meaningfully symptomatic. The international literature is now consistent that ferritin levels below 30 in a symptomatic woman are best treated as iron deficiency that should be corrected, even if the haemoglobin is technically within range.
If you ask for one test the next time you are at a Nigerian clinic and you have been tired for longer than you should have been, ask for the ferritin.
Why Nigerian women are particularly vulnerable
The reasons the prevalence is so high in Nigerian women, specifically, are a set of overlapping mechanisms. Each of them is fixable. None of them is exotic. All of them, in the audit data, contribute.
The first is menstrual blood loss. A meaningful fraction of Nigerian women have heavy menstrual bleeding — often associated with uterine fibroids, which are themselves three to nine times more prevalent in West African and West African-diaspora women than in white European populations — that the woman has come to consider normal because it has always been her normal. The threshold at which heavy menstrual bleeding becomes a clinical problem is well below the threshold most Nigerian women apply to their own cycles. Bleeding that soaks a pad in under two hours, requires double protection, contains clots larger than a coin, or lasts longer than seven days is, by international clinical definition, heavy. Every cycle of heavy bleeding is a transfer of iron out of the body that the diet is not replenishing fast enough.
The second is pregnancy and breastfeeding. Each pregnancy depletes maternal iron stores in a way that, on the published longitudinal data, takes two to three years to replenish under optimal conditions. The Nigerian inter-pregnancy interval is, in much of the population, considerably shorter than this. The woman who has had three pregnancies in five years is, by the standard pharmacokinetics of iron storage, almost certainly iron-deficient by the third trimester of the third pregnancy unless she has been on continuous supplementation, which most women have not. The recovery from each pregnancy is incomplete by the time the next one begins.
The third is dietary. The bioavailable iron in the average West African diet is, for reasons that are nutritional rather than cultural — heme iron from animal sources is more efficiently absorbed than non-heme iron from plant sources — meaningfully lower than in the diets the iron requirements in the international guidelines were originally calibrated against. The woman whose diet is rich in beans, leafy vegetables, and grains is not consuming a low-iron diet, but she is consuming a diet from which iron is harder for the body to extract. The same diet in a man, who is not menstruating, sustains him fine. In a menstruating woman, the diet is enough to maintain a balance against normal blood loss and is not enough to keep up with heavy blood loss or post-pregnancy recovery.
The fourth, in much of the country, is parasitic. Hookworm, schistosomiasis, and recurrent malaria all contribute to chronic iron loss in the populations in which they remain endemic. The Lagos professional in an air-conditioned office is, in the main, not the patient for whom this is the dominant cause. The patient in a rural community in the South-East or the Niger Delta often is. The clinical workup of unexplained iron deficiency in any patient should include consideration of parasitic causes alongside the obstetric and dietary ones.
What the symptoms actually are
The symptoms of iron deficiency in women are diffuse enough that almost every Nigerian woman with the diagnosis has been told they are something else for years. It is worth naming them clearly so that the reader who recognises herself in the list can do something about it.
The most common is fatigue — but a specific kind of fatigue. It is fatigue that does not respond to sleep, that is worst in the late afternoon, that makes climbing one flight of stairs feel disproportionate, that makes the woman feel breathless on activity she used to manage easily, and that her partner, family, and colleagues have begun to notice as a personality change before she has named it as an illness. It is the fatigue that women describe by saying I am not myself.
The second is hair loss. Iron-deficient women lose hair diffusely across the scalp rather than in patches. The shedding is heavy enough to be visible on the comb, the pillow, and the shower drain. Many Nigerian women have been told this is stress, postpartum change, or hair-product damage. It is sometimes those things. It is, very often, iron.
The third is cold intolerance. The iron-deficient woman is the woman in the office who is wearing a cardigan in the heat because she is, despite the room temperature, genuinely cold. The body's ability to maintain thermal regulation is impaired by iron deficiency, and the patient feels it before any of the family blood counts have begun to show anything.
The fourth is restless legs. The unpleasant urge to move the legs at night, which prevents sleep and is often dismissed as nerves or stress, is one of the cleanest neurological signatures of iron deficiency and resolves on iron replacement in a high fraction of cases.
The fifth is brain fog and concentration difficulty. The iron-deficient brain is, measurably, an under-oxygenated brain, and the symptoms that have been written off as exhaustion or distraction frequently improve substantially once the iron is restored.
The sixth — and this is the one most Nigerian women will not bring up to a doctor unless explicitly asked — is pica: the urge to eat ice, raw rice, starch, soil, or other non-food substances. Pica is one of the most specific signs of severe iron deficiency in the literature, and almost every woman the practice has identified pica in has previously been managing it as a private habit she was embarrassed about, rather than as a symptom.
If you find yourself, or a woman you love, in three of these six, the panel to ask for is not the FBC. It is the ferritin, the serum iron, the total iron-binding capacity, and the transferrin saturation. The cost in Lagos at the time of writing is in the region of fifteen to twenty-five thousand naira.
What the treatment actually is
The treatment of iron deficiency is, in most cases, straightforward. It is the under-treatment that is the problem, and the under-treatment has two specific patterns that the Nigerian woman is most likely to fall into.
The first pattern is the inadequate dose of oral iron. The standard prescription many Nigerian women receive after a finally-positive FBC is a low-dose multivitamin containing some iron, given once a day. This is insufficient for the deficient state. The published doses required to actually replenish iron stores from a low ferritin baseline are higher — typically the equivalent of one hundred to two hundred milligrams of elemental iron per day, given either daily or on the alternate-day schedule that the recent literature suggests improves absorption and tolerability. The treatment should continue for three to six months after the ferritin has normalised, because the stores need to be rebuilt fully, not just brought to threshold.
The second pattern is the patient who has been put on oral iron, has had severe gastrointestinal side effects — constipation, nausea, abdominal pain — has stopped the tablets within two weeks, has not told anyone, and has been categorised by her clinician as treated when she has effectively not been treated at all. For this patient, the modern Nigerian private practice has a serious option that the country has been slow to offer routinely: intravenous iron. A single infusion of one of the modern intravenous iron preparations — ferric carboxymaltose is the most widely available in Lagos — corrects severe iron deficiency in one or two visits, bypasses the gastrointestinal route entirely, and is suitable for the patient who has failed oral iron, who has heavy menstrual bleeding that is outpacing oral absorption, or who is being prepared for surgery on a depleted ferritin. The cost of the infusion in Lagos is significantly higher than oral therapy, but for the woman who has been failing oral iron for years, it is, on the published data, the most efficient single intervention available.
The Kinedic position on this
We treat iron deficiency, in any Nigerian woman who presents with a relevant symptom cluster, as a measured diagnosis rather than as a suspicion. The intake panel includes a ferritin and a full iron studies set as standard for any woman aged fifteen to fifty-five. We treat to a ferritin target, not to a normal-haemoglobin target, because the symptoms resolve as the stores are rebuilt and not as the blood numbers cross a threshold. We have a low threshold for moving to intravenous iron in the patient for whom oral therapy is failing on tolerability or on adequacy. We treat the underlying cause where it is treatable — the fibroid that is producing the heavy menstrual bleeding, the gynaecological intervention that should be discussed, the dietary changes that genuinely matter alongside the supplementation — rather than restarting the same oral iron cycle every six months on top of an unchanged blood-loss pattern.
The honest conclusion of the piece, for the woman reading this who recognises herself in the eight-year fatigue, is short. Looking healthy is not a diagnosis. Feeling tired for years and being told it is stress, work, or Lagos is not a diagnosis. The diagnosis is on a panel that nobody has ordered yet, and ordering it costs less than dinner, and the symptoms that have shaped a decade of your life resolve, in a strikingly high fraction of cases, on a treatment course that ends in three months.
The number on the panel is what is owed to you. Ask for it.