If you've been told you have iron overload, or your bloodwork is pointing that direction with a high ferritin or a high iron saturation, here's the reassuring part: this is one of the more manageable conditions I treat. The harder part is getting the diagnosis right and avoiding a few common missteps along the way. In this post I'll walk through exactly what I do when I suspect a patient has iron overload or hemochromatosis. How I confirm it, when genetic testing earns its place, and the handful of things you actually do once the diagnosis is clear.
Diagnosing the source of iron overload isn't always straightforward, because several conditions can mimic one another. So before doing anything else, you want to confirm that what you think is going on actually is.
Most people land here because a blood test came back high. Usually that's ferritin, serum iron, or iron saturation. An elevated level on any one of those is presumptive for iron overload. Some people are looking into it for a different reason: a family member was diagnosed with hemochromatosis, and they want to know what to watch for.
The test to anchor on is iron saturation. When it's elevated, it means that at that moment there isn't enough transferrin floating around to bind up your iron, which is what keeps iron safer for your body. In hemochromatosis, the iron saturation tends to creep up close to and past the top of the normal range, which is around 46 percent. If yours is sitting there, that's genuinely suspicious.
What I usually have patients do is retest it. Before the retest, ease off red meat and specific iron supplements for a stretch so you get a cleaner read. If it's still high, that points more firmly toward a hemochromatosis picture. If it drops back down, diet may have been inflating the number, and you simply follow it over time instead.
The genetic test isn't the first move. It's what you reach for when the lab picture stays suspicious: an iron saturation that won't come down, a ferritin that keeps climbing. At that point it makes sense to confirm things genetically.
Insurance often covers this test when your lab metrics justify it, although most plans want a prior authorization first, and every insurer is different. The reason it's worth doing is that genetics tell you two useful things: how careful you need to be with iron in your diet, and what you might be passing on to your children.
There are specific variants involved. C282Y generally causes more severe hemochromatosis. H63D, percentage-wise, leads to far less. So if you carry C282Y, that tells me you'll need to put considerably more effort into avoiding high-iron foods. That's a big part of why knowing your genetics is useful when this is an ongoing problem.
Two things complicate the picture. First, you can carry hemochromatosis genetics and still have completely normal iron levels. Second, and more commonly, you can have a lab pattern that looks like iron overload without actually having it.
The classic example is inflammation. Inflammation drives ferritin up. But here's the tell that separates it from true overload: with inflammation, your iron saturation usually stays within the normal range. With hemochromatosis, the iron saturation rides the upper end. If you want to go deeper on that one number, I've written a full post on what causes high iron saturation.
Inflammation-driven ferritin also isn't persistent. A month of being sick can push ferritin up, but once that infection or trigger clears, the number normalizes. Hemochromatosis is different. Those elevated iron levels stay stubbornly high, riding the upper end, even when you try to lower your iron intake.
Once the diagnosis is solid, there are five or six buckets of things you'll want to be doing. The two biggest are phlebotomy and diet.
Phlebotomy, which is therapeutic blood donation, is the most common. It drops your ferritin and iron saturation fairly quickly. How much donation you actually need depends on how high your numbers are to begin with. The more standard way to approach this is to donate once a week for four to six weeks and then recheck. I tend to be more cautious than that. I'd rather watch the numbers closely between each donation, see how far they came down, and let that guide how much donation actually makes sense. It's always better to err toward caution with donation than to overdo it, and monitoring as you go teaches you how quickly your iron rebuilds, which makes managing it long term much easier.
Diet is the second piece. You want to look at what you're eating and find alternatives that carry less iron. Just as important, you don't want to inadvertently increase iron absorption. Vitamin C taken alongside a meal boosts iron uptake, so that's one to be mindful of.
Inflammation cuts both ways here. It drives ferritin up, and high iron in turn drives inflammation up. So you want to monitor inflammation alongside your iron numbers, going back and forth between the two. The exception is if your inflammation is already normal, in which case you don't need to track it.
High iron can also affect other systems. Testosterone, pituitary hormones, and even insulin production in the pancreas can all be linked to elevated iron levels, so those are worth watching if iron has been high for a while.
Once your levels are back in a normal range, you'll most likely still need ongoing monitoring, roughly every three to six months, to make sure ferritin and iron saturation aren't starting to climb again. And when phlebotomy isn't enough, perhaps because someone is a hyper-absorber of iron, or there's an organ complication where you need to speed things up, iron chelators are an option. They aren't something I've needed to use, but they do exist.
Targets are somewhat individualized. Some people feel weak and fatigued when their iron or ferritin runs low, and some people start to feel pain and other problems when iron runs too high. So there's a personal element to it.
That said, here are some general ranges. For ferritin, in both men and women, you're probably going to want to be south of 100 on the top end, and somewhere around 30 to 50 on the low end. Iron saturation is the number you definitely want to keep inside the normal range. For some people that becomes a balancing act, getting iron saturation low enough while still keeping ferritin in a reasonable place. If you want the fuller picture on ferritin specifically, here's the danger of high ferritin and why it matters.
One more thing to watch: anemia. The first priority is bringing iron down, but as you do that, your red blood cells can get thrown off. It can become a delicate balance between having enough red blood cells, a low enough ferritin, and a low enough iron saturation. That's exactly why I prefer more frequent follow-up, so you catch any imbalance early instead of having to correct it later.
Iron overload is treatable, and it isn't especially hard to manage once you've got it pinned down. The real work is in two places. First, getting the diagnosis right: iron saturation is your anchor, retest before you panic, and use genetic testing when the picture stays murky. Second, managing it consistently with phlebotomy, smart diet choices, and regular monitoring. Done well, most people keep their iron in a healthy range without much drama.
Want the full playbook? I put everything I know about reading and managing iron overload, the lab patterns, the thresholds, and the treatment steps, into the Iron Overload Decoder. Grab your copy here. Or work with me directly to build a plan around your specific labs.
Topics: Iron Overload, Hemochromatosis, Ferritin, Iron Saturation, Phlebotomy, C282Y, Genetic Testing