It's been a while since I had a blood test, but the last time, the doctor said I was borderline anemic and told me to take iron pills. I take a multivitamin w/ iron, and every so often, my running performance starts to suffer until I start doubling down on the pills. My performance has been going downhill recently and I've been feeling short of breath on easy workouts. Along with my multivitamin w/ 15mg of iron, I just started taking an iron pill with 65mg. But I'm literally feeling ZERO symptoms from the pills. Is it possible that none of it's being absorbed? I've taken these pills before, and I immediately started feeling the symptoms. Any ideas what's going on?
Note: I'm not even sure whether iron deficiency is the problem. All I know is that the multivitamin with iron seemed to be helping a lot.