It’s interesting how the ranges on everybody’s tests are different. The last time I had a test, the range (male) was 30-400ng/mL.
I’m guessing that an athlete’s low end of the range is probably higher to be optimal. Dr. Gemini Google suggests 50-70 as a minimum.
Interesting article with lots of links to relevant studies.
Checking in here to say that I’ve done about 5-6 weeks now of iron supplementation: 130mg elemental iron taken every other day, generally on an empty stomach (2 hours of no food or coffee on either side of intake) with vitamin C. Halfway through week 2 I noticed my anxiety and some of weakness starting to diminish ever so slightly, and that trend has continued. Started feeling a bit more like myself again on the bike and hitting power records for the year after ~4 weeks. Is it the iron? Is it just that my circumstantial anxiety has abated for reasons unrelated to biology? Or did my anxiety go down because I got my ferritin up? Who knows? I think you could argue either way from what I’ve read, just sharing the results so far.