Iron pills may weaken immunity in rare bleeding disorder

This study looks at how iron supplements, often given for anemia, affect the immune system in people with Hereditary Haemorrhagic Telangiectasia (HHT), a rare genetic disorder that causes frequent nosebleeds and abnormal blood vessels. About 155 adults with HHT will be divided into groups based on whether they take iron by mouth, through a vein, or not at all. Researchers will measure changes in immune cells to understand if iron helps or harms the body's defenses.