I've written before about iron in the context of postpartum fatigue, but I want to give it its own fuller treatment, because iron deficiency is remarkably common in women well beyond the postpartum window — and it's both underrecognized and very treatable. If you're a woman who's been dragging through life exhausted and chalking it up to being busy, this one's worth reading closely.
Let's start with why women are particularly prone to running low on iron, because the reasons are baked right into normal physiology. The big one for many women is menstruation: monthly blood loss means a monthly loss of iron, and for women with heavier periods, that loss can be substantial enough to outpace what they take in from diet. This is an ongoing, recurring drain that simply doesn't apply to most men the same way, which is a big part of why iron deficiency skews so heavily female. Add pregnancy and postpartum on top for those who experience them, and certain other situations, and you have a population genuinely prone to coming up short — not because they're doing anything wrong, but because the demand is structurally higher.
Iron matters enormously because it's central to making hemoglobin, the part of your red blood cells that carries oxygen throughout your body. When iron is low, your body can't make enough healthy red blood cells, and the result can be iron deficiency anemia — which essentially means your tissues aren't getting oxygen as efficiently as they should. Hence the hallmark symptom: fatigue. But not just any tiredness. The kind of deep, persistent exhaustion that sleep doesn't fix, the bone-deep depletion that makes ordinary days feel like wading through mud.
And here's what I really want women to know: the symptoms of low iron can be easy to dismiss or attribute to everything else in a busy life. Beyond profound fatigue, low iron can cause weakness, difficulty concentrating, feeling cold, shortness of breath with exertion, pale skin, headaches, and sometimes more unusual signs like unusual cravings (including, strangely, for ice). Because exhaustion and difficulty concentrating get so readily blamed on stress, poor sleep, or "just life," iron deficiency often goes unrecognized for a long time. Women are especially likely to be told they're simply run down or stressed when something genuinely physical and fixable is going on — and that pattern of dismissal is exactly what I want to push against.
The genuinely good news is that this is very checkable and very treatable. A simple blood test can assess your iron status — and it's worth noting that this typically means looking beyond just a basic blood count to markers of your iron stores, like ferritin, since your stores can be depleted before a standard count looks clearly abnormal. This matters, because a woman can be told her "blood count is normal" while her iron stores are actually running low, leaving her symptomatic but reassured she's fine. That's a frustratingly common scenario, and it's why the right test matters, not just any test.
If you are low, the approach depends on the degree and the cause, and that's where a provider comes in — it can range from dietary changes to iron supplementation, and importantly, looking into why you're low in the first place, especially if there's no obvious explanation, since the cause sometimes matters as much as the deficiency itself. I won't lay out a self-treatment plan here, partly because iron supplementation should be guided rather than guessed (taking iron you don't need isn't benign, and the form and dose matter), and partly because the underlying cause deserves attention, not just the number.
On the food side, iron comes in two forms: heme iron, from animal sources like red meat, poultry, and fish, which your body absorbs more readily, and non-heme iron, from plant sources like legumes, leafy greens, and fortified foods, which is absorbed less efficiently but still valuable. A useful tip: pairing plant sources of iron with vitamin C can help with absorption, which is genuinely helpful for those eating less or no meat.
So here's my real message, especially to the women reading this: if you've been exhausted in that deep, persistent, sleep-won't-fix-it way, and especially if you have heavier periods or other reasons to be prone to low iron, please don't just accept it as your unchangeable normal. Iron deficiency is common in women, frequently overlooked, easy to check for with the right test, and very treatable once identified. Sometimes the cause of feeling perpetually wiped out is something concrete and fixable hiding in your bloodwork — and you deserve to have someone actually look for it rather than tell you you're just tired.
Chantal Rubio, FNP-BC. Educational only, not medical advice. Iron testing and treatment should be guided by a provider.