Revisiting a topic I posted an entry about earlier this year, I recently found a source for low cost ferritin testing (among many other inexpensive tests) available across the USA, HealthCheckUSA.com. The last time I tried to get a ferritin level through my HMO just for my annual physical, it was a huge hassle as they would not order the test without a medical diagnosis to prompt it -- they would prefer me to wait until I was actually showing symptoms of anemia and not just seeking a more ideal ferritin level for athletic performance. I wound up getting a ferritin level that one time because the doctor I saw turned out to be a runner, too, and understood my concern. So even if one has health insurance, it might turn out to be much easier to go directly to a lab to get ferritin levels on a regular (quarterly) basis. Check the website for an affiliate near you.