Iron deficiency is one of the most common nutritional shortfalls in the world, and women of reproductive age carry most of it. Yet it routinely goes unfound for years — because its symptoms are the symptoms of modern life.
Why women, specifically
The arithmetic is simple: menstruation means regular iron loss, and heavy periods — common in the years approaching menopause — mean more. Pregnancy draws heavily on iron stores. Meanwhile the recommended intake for premenopausal women (18mg per day) is more than double that for men, and harder to hit from a typical diet.
Why it gets missed
The symptoms are generic. Fatigue, poor concentration, feeling cold, breathlessness on stairs, restless legs, hair shedding — every one of these has a dozen plausible explanations, and “you’re busy and stressed” is usually offered first.
Standard tests can look normal. Iron deficiency develops in stages. Ferritin — the measure of iron stores — falls first, often long before hemoglobin drops into anemia. A basic blood panel that only checks hemoglobin can come back “normal” while iron stores are nearly empty, and symptomatic.
The threshold debate. Laboratories commonly flag ferritin only below a low cutoff, while many clinicians consider symptomatic patients with higher-but-still-low values worth treating. Two women with the same result can get different answers depending on who reads it.
What to do with this
If persistent fatigue is on your list, ask specifically for ferritin to be included in blood work, not just a complete blood count — and ask for your actual number, not just “normal”.
One important caution: don’t start high-dose iron supplements on a hunch. Excess iron is not harmless, some people have conditions that cause iron overload, and supplementing blindly can mask the cause of a deficiency (which itself deserves investigation). Test first, then treat what the numbers show, with your clinician.