Secreted ferritin originates from the spleen during red blood cell turnover and may reflect spleen health rather than iron status.

“and so and much of other stuff obviously but the but the the fertin is coming out of the spleen and my evolving thinking about fertin is it's not it's not really telling us what's going on with iron it's telling us what's going on with the spleen it's a barometer for spleen and here's the part that you're going to find absolutely unnerving is that this secreted uh fertin this is according to people like Douglas Kell arosio Warwood there's a dozen different articles that I've identified um Tori and Tori famous husband and wife team um serum Fittin is empty shotgun shells H the iron has already been discharged in the spleen into the maccrage of the spleen and what's coming out what's being secreted is an Abridged form of light chain it's missing 10 amino acids and that's why it's called secreted fertin because fertin supposed”