I found out today that I'm anemic and need to start taking iron supplements. The doctor told me that I was at 40 (18 y/o male), which apparently means that my hematocrit makes up 40% of my blood (correct?). I have been running poorly this year, but I attributed that to adjusting to higher mileage and college life in general. My doctor told me to take a liquid supplement or pills, get tested again in four weeks, and also gave me a sheet with foods and the amount of iron they contain. Can anyone here tell me a bit more on this topic?
How much can this be affecting my running? Will getting my hematocrit back to a normal level yield noticable improvements?