Why “dumping iron”?

You have had blood drawn more than once in your life, and nobody has ever sat you down to talk to you about iron. Your doctor isn't being careless. The number that would tell you is usually not ordered, and the range it gets judged against is wide enough to cover almost everyone.

Meanwhile it has been building up since you stopped growing, a little more every year, and your body has no way to get rid of it.

Here is the shape of the problem, and it is the same shape as body fat. You need some. Too little and your body stops working properly. Too much and you're carrying a driver of nearly every chronic disease. Nobody sensible argues for zero, and nobody sensible argues for unlimited. There's a range, and most people in the developed world sit well above it.

Iron works the same way, and almost nobody knows it. You can't live without it. It carries oxygen in your blood and runs the machinery inside your cells, and too little leaves you anemic and ill. But your body has no way to get rid of what it doesn't need. Nothing carries it out. So it builds up, year after year, and where you sit on that curve depends a great deal on who you are.

Where do you sit?

This is the part almost nobody is told. Your sex, and for women your stage of life, changes your iron more than almost anything else you do.

Typical ferritin, in nanograms per milliliter.

By age 45 the average man carries about four times the iron of the average woman. He also has about four times the rate of heart attacks.

Millions of people take iron supplements who shouldn’t

Most multivitamins contain iron. So do plenty of general tonics and greens powders, and most of the people swallowing them every morning have never had a reason to ask whether they need it.

Some people do. Women who are still menstruating lose iron every month, and for them a supplement is often exactly right. So is anyone whose doctor has found a deficiency and put them on it. That is a real condition, it has real symptoms, and it is your doctor’s to manage.

The rest of us are a different story. Men have no monthly loss and no way to excrete what we take in. Neither do women once menstruation stops. For both groups, a daily iron tablet is a small deposit into an account that was already filling on its own, and nobody sends a statement.

If you don’t know which group you’re in, one blood test settles it.

Excess iron causes no symptoms of its own, which is what makes it easy to miss. You don't feel high iron. You feel the disease it helped cause, years later, under a different name. Heart disease, cancer, diabetes, Alzheimer's. It does its damage quietly, over decades, and hands you the bill under another heading.

That is what dumping iron means. Not getting rid of iron, which would kill you. Getting down from the high end of that curve into the range where your body works best. One inexpensive blood test, ferritin, tells you where you stand. Had that test? Here is how to read your result.

Then the honest part. Getting your iron right won't by itself make you lean, fit, and strong. Iron is one lever. If you're carrying too much fat and too little muscle, correcting your ferritin won't correct that. It's worth doing. It isn't the whole job.

The full case, chapter by chapter, with 147 references. Or start with the introduction.