@FatEmperor - ever heard of glycosylated ferritin ? I think it& #39;s something you should look into. (In normal individuals, 50-81% circulating ferritin is glycosylated;
glycosylated ferritin has a longer half-life (~50 h) than non-glcosylated
ferritin (5 h).)

Here& #39;s where I got the data from. http://www.acb.org.uk/docs/default-source/committees/scientific/amalc/ferritin.pdf">https://www.acb.org.uk/docs/defa... - I was researching how to distinguish between elevated ferritin from iron excess vs. (inflammation and other sources). And I know you are a "root cause" type of guy.

since glycosylated ferritin lasts longer than ferritin, elevated ferritin (which includes both) is an indirect measure of hyperinsulinemia / hyperglycemia. I see sooooooo many people in the mid 300s (normal 22=-275 ug/L).

Another lab& #39;s normal is 15 - 517 ug/L. I think they just changed the range. Why deal with chronic hyperinsulinemia / hyperglycemia when you change just change the range and "it& #39;s normal". I& #39;ve never seen an upper level of normal in the 500s, until today. Weird.

Children have typically have lower ferritin than adults. Why would that be ? In males, the median ferritin level increased from 23 mcg/L at ages 12-16 years to reach a plateau in the 120s after age 32. Women stayed in the 30s til menopause, after which rose to 80 mcg/L. Hmmm.