Understanding the HFE Gene Test
The HFE gene test checks for the inherited gene changes that cause hereditary hemochromatosis, a common condition where the body absorbs and stores too much iron.
What This Test Looks For
Hereditary hemochromatosis is most often caused by changes (mutations) in a gene called HFE. The two most common are named C282Y and H63D.
This is a one-time genetic test, usually done with a blood sample. Your genes do not change, so the result is valid for life.
What Your Results Can Mean
| Result | What It Means |
|---|---|
| Two copies of C282YHighest Risk | The most common genetic cause of hemochromatosis. It raises the risk of iron overload, though not everyone with this result develops problems. |
| One copy (carrier)Carrier | You carry the gene change but usually will not develop significant iron overload. It can still be relevant for family members. |
| No mutationsLow Genetic Risk | Hereditary hemochromatosis from HFE is unlikely. |
What’s Most Important to Know
A genetic result tells us about risk, not whether iron is actually building up. We pair it with iron blood tests (ferritin and transferrin saturation) to see the full picture.
Hemochromatosis is very manageable when caught early, often with simple blood removal. Because it is inherited, a positive result may prompt testing for close relatives. Dr. Mui will guide next steps.
This page is for general education and does not replace a conversation with your doctor about your specific results. Want to review your results? Book a visit and we’ll go through them together.