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Hemochromatosis Symptoms: What to Look For, and the Blood Tests That Find It

Many people with hereditary hemochromatosis have no symptoms for years. Here is what iron overload can feel like, who should be tested, and the blood tests that find it, starting with transferrin saturation and ferritin before HFE gene testing.

Published

October 26, 2026

Read time

11 min read

Medically reviewed by

Rhonda Collins, FNP-C

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Many people with hereditary hemochromatosis have no symptoms at all, often for decades. When symptoms do appear, the early ones are things like tiredness, weakness and joint pain, which are common and have many other causes ^[1][2]. That is why the condition is usually found with blood tests rather than by how someone feels. The tests run in a set order: transferrin saturation and ferritin first, then a genetic test for the HFE gene if those come back high ^[3][4].

Hemochromatosis is worth finding early. Iron that builds up quietly over years can damage the liver, heart, pancreas and joints, and treatment started before that damage is simple and effective ^[2][5]. So the useful version of this article is not only a symptom list. It is what to measure, in what order, and what the results mean.

What hemochromatosis is

Hemochromatosis is a disorder in which the body absorbs too much iron from food and stores the extra in its tissues ^[6][7]. The body has no good way to get rid of surplus iron, so the excess keeps accumulating, mostly in the liver, heart, pancreas, skin and joints ^[7].

There are two broad kinds, and the difference matters for testing:

• Hereditary (primary) hemochromatosis is caused by inherited gene changes that switch off the normal brake on iron absorption ^[6]. The most common form, type 1, comes from changes in the HFE gene. The key variant is called C282Y. A second variant, H63D, can contribute to iron overload when it is paired with C282Y ^[6][1]. Two copies of C282Y are found in about 85 to 90 percent of people with primary hemochromatosis ^[1].
• Secondary iron overload has an outside cause, most often many blood transfusions for severe anemias such as thalassemia or sickle cell disease ^[1]. Iron can also build up in the liver in severe liver disease, such as cirrhosis from alcohol or advanced hepatitis B or C ^[1].

Rarer non-HFE forms, including juvenile hemochromatosis, cause earlier and more severe iron loading, sometimes with complications by the teenage years ^[1][7]. This article focuses on HFE hemochromatosis, the type most adults are tested for.

Hemochromatosis symptoms

Not everyone with hemochromatosis has symptoms, and it may cause none for many years ^[1]. CDC notes that many people with the condition do not know they have it ^[2]. In large population screening studies, only about 70 percent of people with two copies of C282Y had raised iron stores, and fewer than 10 percent develop severe iron overload with organ damage ^[3].

Early symptoms

When symptoms appear, the early ones are vague ^[1][2][7]:

• feeling tired or weak
• joint pain, especially in the knees and hands, including the knuckles of the index and middle fingers ^[3]
• pain in the upper right abdomen, over the liver
• weight loss
• loss of interest in sex, or erectile dysfunction

Later symptoms and signs

With more iron, people may develop ^[1][2][7]:

• darkening of the skin, which may look gray, metallic or bronze
• arthritis
• signs of liver disease, including cirrhosis
• diabetes
• heart problems, including heart failure and irregular heart rhythms ^[3]

Symptoms usually begin after age 40. On average, women develop symptoms about 10 years later than men, usually after menopause ^[1]. If you are chasing persistent tiredness without an obvious cause, our guide on why you might always be tired covers the other common causes.

Who should be tested

Testing makes the most sense for people at higher risk, and the guidelines target those groups rather than everyone ^[3].

• A close relative with hemochromatosis. If a parent, brother or sister, or child has it, you should be checked ^[5]. AASLD recommends iron studies and HFE testing for all first-degree relatives of someone with HFE hemochromatosis ^[3]. CDC singles out siblings in particular ^[2].
• Northern European ancestry. About 1 in 15 people of Northern European ancestry carry at least one copy of C282Y, and about 1 in 225 carry two ^[6]. Primary hemochromatosis is much less common in people of Asian or African ancestry ^[6].
• Symptoms or findings that fit. Unexplained fatigue with joint pain, abnormal liver tests, liver disease, diabetes or heart failure can all prompt testing ^[3]. AASLD recommends that anyone with evidence of liver disease be evaluated for hemochromatosis ^[3].
• An abnormal iron result on routine blood work. AASLD advises that abnormal iron studies be followed up even without symptoms ^[3].

Why men and women differ

Men and women are equally likely to inherit C282Y, but men are more likely to develop iron overload, symptoms and complications ^[6]. Menstruation removes iron with each period, which slows iron buildup in women until menopause ^[6]. In one population study cited by AASLD, iron-overload-related disease was documented in 28 percent of men with two copies of C282Y and 1 percent of women ^[3]. Heavy alcohol use and other chronic liver disease, especially hepatitis C, raise the risk of severe iron overload in people who carry the gene ^[6].

The blood tests for hemochromatosis, in order

Blood tests are the core of the diagnosis ^[4]. CDC describes the sequence plainly: blood tests for excess iron, followed by genetic testing ^[2]. AASLD recommends measuring transferrin saturation and ferritin together rather than relying on one test ^[3].

Step 1: transferrin saturation

Transferrin is the protein that carries iron in the blood. Transferrin saturation (TSAT) is the percentage of it that is loaded with iron, calculated from serum iron and total iron-binding capacity (TIBC) ^[3]. NIDDK describes a high ratio of iron to transferrin as a sign that suggests hemochromatosis ^[4].

A TSAT of 45 percent or higher is the threshold the guidelines use to prompt further testing ^[3][8]. It is chosen because it is sensitive: it catches most people with two copies of C282Y. The tradeoff is that it also flags some people who carry one copy and some with mild secondary iron overload, so a high result is a reason to look further, not a diagnosis ^[3].

Serum iron moves with recent meals and supplements, so AASLD advises confirming a high TSAT with a second test, and considers a fasting sample reasonable for that repeat ^[3]. Our iron saturation reference page explains the marker on its own, and our guide to high iron saturation covers what else can push a single result up. A raised serum iron on its own is covered in high iron symptoms.

At Mito, the iron and TIBC panel reports serum iron, TIBC and transferrin saturation from one blood draw.

Step 2: ferritin

Ferritin is the protein that stores iron, and its blood level tracks how much iron the body has stockpiled ^[4]. A high ferritin is typical in hemochromatosis, and ferritin is also the number doctors follow to see whether treatment is working ^[4]. A ferritin test is the usual partner to TSAT, and our ferritin reference page explains its ranges.

AASLD recommends HFE gene testing when either result is abnormal: a TSAT of 45 percent or higher, or a ferritin above the lab’s upper limit of normal ^[3]. At the other end, a normal ferritin together with a TSAT below 45 percent had a 97 percent negative predictive value for excluding iron overload in a study of people under 35 ^[3].

Step 3: HFE gene testing

If the iron studies are abnormal, a clinician orders a genetic test for the HFE variants C282Y and H63D ^[3][4]. Finding two copies of C282Y confirms primary hemochromatosis ^[4]. Mito does not offer HFE genetic testing, so this step goes through your doctor.

The genotype changes what the iron results mean:

Step 4: checking the liver

Once hemochromatosis is confirmed, the next question is whether iron has already damaged the liver. ACG describes a ferritin below 1,000 ng/mL at diagnosis as an important marker of low risk for advanced liver scarring, and recommends using it routinely in the first evaluation ^[8]. Above that level, especially with raised liver enzymes, the risk of cirrhosis is higher and doctors assess the liver further ^[3]. MRI can now measure liver iron, which has removed the need for a liver biopsy in most patients ^[8]. A hepatic function panel shows the liver enzymes that feed into that decision.

Why ferritin alone is not enough

A high ferritin is the result most people notice first, and it is the one most likely to mislead. Ferritin rises with inflammation as well as with iron stores ^[3]. AASLD lists alcohol-related liver disease, chronic hepatitis B and C, fatty liver disease, lymphoma and other chronic inflammatory conditions as causes of a raised ferritin without extra iron ^[3]. In the general population, iron overload is not the most common reason for a high ferritin ^[3].

ACG makes the same point from the other direction: in people with a high ferritin who do not carry two HFE variants, fatty liver disease and alcohol-related liver disease are more common explanations than hemochromatosis ^[8]. Our guide to high ferritin works through those causes, and our article on fatty liver disease covers the most common one.

This is why the two tests are read together. A high ferritin on its own cannot tell iron overload apart from inflammation or liver disease. AASLD still recommends HFE testing when either result is abnormal, and the genotype, together with a check for liver disease and other causes, shows which explanation fits ^[3][8].

Complications if hemochromatosis is not treated

Without treatment, iron overload can lead to ^[6][2]:

• Cirrhosis, where scar tissue replaces healthy liver tissue, and eventually liver failure
• Liver cancer, a risk that rises with cirrhosis
• Diabetes, from iron damage to the pancreas
• Heart problems, including heart failure
• Arthritis
• Low sex hormone levels, causing loss of sex drive and erectile dysfunction

CDC notes that the earlier hemochromatosis is diagnosed, the less likely serious complications are, and many of those complications cause permanent problems ^[2]. AASLD lists improved survival among the benefits of diagnosis and treatment before cirrhosis develops ^[3].

How hemochromatosis is treated and monitored

The main treatment is therapeutic phlebotomy: removing blood on a regular schedule, much like a blood donation, to lower the amount of iron in the body ^[2][5]. NIDDK describes it as simple, inexpensive and safe ^[5]. A clinician sets how much and how often based on iron levels, and tracks ferritin with regular blood tests ^[5]. Once iron levels return to normal, sessions are spaced out for long-term maintenance, with ongoing iron and ferritin checks ^[5].

Treatment can improve symptoms and prevent complications ^[5]. Some damage, such as advanced cirrhosis, may not reverse once it has developed ^[5]. People who cannot have blood removed, including many with transfusion-related secondary iron overload, may be prescribed iron chelation medicines instead ^[2][5]. CDC also lists avoiding alcohol among the steps a provider may recommend ^[2], and AASLD advises people being treated to avoid vitamin C supplements ^[3].

People with two copies of C282Y and a normal ferritin may not need phlebotomy yet. AASLD recommends yearly iron studies for relatives in that situation, with treatment started if ferritin rises ^[3].

When to see a doctor

See your doctor if a repeat TSAT is 45 percent or higher, if your ferritin is high, or if a close relative has been diagnosed with hemochromatosis. They can order HFE testing and assess your liver. Seek care promptly for signs of advanced liver disease, such as yellowing of the skin or eyes or swelling in the legs or abdomen.

Where to start

If you have a family history, Northern European ancestry, or unexplained fatigue and joint pain, start with an iron and TIBC panel, which reports transferrin saturation, and a ferritin test. Together they are the first two steps of the guideline workup and tell you whether HFE testing is the next one.

References

1. National Institute of Diabetes and Digestive and Kidney Diseases. Symptoms and Causes of Hemochromatosis.
2. Centers for Disease Control and Prevention. About Hereditary Hemochromatosis.
3. Bacon BR, et al. Diagnosis and management of hemochromatosis: 2011 practice guideline by the American Association for the Study of Liver Diseases. Hepatology. 2011;54(1):328-343.
4. National Institute of Diabetes and Digestive and Kidney Diseases. Diagnosis of Hemochromatosis.
5. National Institute of Diabetes and Digestive and Kidney Diseases. Treatment of Hemochromatosis.
6. National Institute of Diabetes and Digestive and Kidney Diseases. Definition and Facts for Hemochromatosis.
7. MedlinePlus Genetics. Hereditary hemochromatosis.
8. Kowdley KV, et al. ACG Clinical Guideline: Hereditary Hemochromatosis. Am J Gastroenterol. 2019;114(8):1202-1218.