My ferritin was 12 for two years despite taking iron daily. Finally figured out why.

Two years of taking iron supplements religiously. My ferritin started at 8, climbed to 12, and then just... stopped. My doctor kept increasing the dose. I tried different forms of iron. Nothing worked. I was exhausted, losing hair, and couldn't understand why my body wouldn't absorb iron despite taking massive doses that turned my stomach into knots.

The answer came from an unexpected source. My inflammatory markers were elevated, specifically CRP and ferritin's relationship to hepcidin. It turns out when your body is in an inflammatory state, it produces hepcidin, which blocks iron absorption as a protective mechanism. But the inflammation was subtle. No obvious symptoms, just slightly elevated markers that previous doctors had dismissed as "probably nothing."

Meanwhile, my body was actively preventing iron absorption because it sensed inflammation. The real breakthrough was addressing the root cause of inflammation rather than just supplementing iron.

For me, it turns out it was undiagnosed SIBO causing intestinal inflammation. Once we treated that, my iron levels finally started climbing without increasing supplements. Within three months of addressing the underlying inflammation, my ferritin went from 12 to 45. Same iron dose, completely different absorption.

This taught me that sometimes the problem isn't what you're taking, it's what's preventing your body from using it. Learning the hard way that iron deficiency that doesn't respond to supplementation often has an underlying cause that needs addressing first.