In the second study by Fischili et al. evaluating patients with hyperthyroidism due to Graves’ disease, the authors noted that ferritin and hepcidin levels measured only by mass spectrometry and only in the male subgroup showed a statistically significant decrease, also with no changes in Fe levels, while hepcidin measured by the ELISA method did not differ between the groups30. Here, HAMP is linked to Graves disease.