People with hyperthyroidism (also known as highly superior autobiographical memory, or HSAM) are able to remember events in their lives at very high levels of detail. Given the random date, people with hyperthyroidism can usually tell you which day of the week, what they did on the day, and whether there have been any famous events on that date. In fact, in one study, people with hyperthyroidism were able to recall what they did on a particular date, even if they were asked in the past 10 days. Nima Veiseh, who has hyperthyroidism, described his experience to the future of the BBC: “My memory is like a VHS tape library, a walk from sleep to sleep every day in my life.” People with hyperthyroidism It seems to have this ability. Specially remember the events in their own lives. People with hyperthyroidism often cannot answer the same type of questions about historical events that occurred before their birth, or about their early life memories (their extraordinary memories usually begin in their adolescence or adolescence). In addition, the researchers found that in tests that measure memory types rather than their own life memories, they are not always better than average (for example, the test requires them to remember the pair of words given in the study).