A few weeks ago, I was interviewed for a local newspaper article. Honestly, I had no idea so many people still read those. I tend to skip the local news, probably mostly because it's in French (and I’m not a native speaker).

But the responses surprised me. People have been stopping me around town ever since. And many of them, older women especially, wanted to talk about iron. Specifically, about having too much of it.

I knew something about iron overload, but I hadn't expected so many women in my area to have experienced it firsthand. It turns out Brittany is a genetic hotspot for hereditary hemochromatosis. The irony of living here is not lost on me.

It also got me thinking. Because beyond the genetics, something shifts for all women when it comes to iron at menopause — and most of us have never been told what that is or why.

Iron accumulates. Ferritin levels typically double or triple after the final menstrual period and they can keep rising for years afterward. For most of your reproductive life, iron deficiency was the concern, primarily because of our monthly blood loss. After menopause, we’re in the clear.

The reason comes down to estrogen, and a lesser-known hormone it controls: hepcidin.

Your body controls iron absorption through a liver hormone called hepcidin. When it's high, iron absorption slows and iron gets locked into tissues; when it's low, iron moves freely.

Estrogen suppresses hepcidin, keeping iron available and circulating during your reproductive years. When estrogen drops at menopause, that brake releases: hepcidin rises, monthly blood loss stops, and iron begins to accumulate in tissues.

Researchers have begun calling this the estrogen-iron axis: high estrogen, lower iron stores; low estrogen, higher iron stores.

Higher iron stores (i.e., ferritin) after menopause are consistently associated with metabolic syndrome, insulin resistance, and type 2 diabetes. Emerging research also links elevated ferritin to bone loss and brain aging.

But it's worth being precise about what "associated with" means here: elevated ferritin in postmenopausal women appears to be a marker that tracks alongside these conditions — often reflecting age, BMI, alcohol, and metabolic dysfunction — rather than a proven independent cause of organ damage.

Somewhere between 10–35% of postmenopausal women without hereditary hemochromatosis have ferritin above commonly used elevated thresholds. Whether and how often this translates into clinically meaningful harm in otherwise healthy women is not well quantified in the literature.

The clearer disease story involves hereditary hemochromatosis, where genetic iron overload, if untreated, can damage the liver, heart, and joints. But even here, serious clinical disease develops in only 1–6% of women carrying the highest-risk variant. In premenopausal women without a genetic predisposition, significant iron overload is thought to be rare, though this group is understudied.

What the research does support clearly: ferritin rises significantly after menopause.

If you're perimenopausal or postmenopausal, here's what to do with this information:

📊 Get a ferritin test. Ask for it at your next appointment. It's a simple add-on to standard bloodwork.

💊 Check your multivitamin for iron. Many women's multivitamins include iron formulated for reproductive-age women. Worth knowing if your life stage has changed.