There isn’t a single, universal answer to increasing iron. When oral iron isn’t improving labs, the more important question is why absorption is impaired in the first place.
Common contributors include intestinal inflammation or dysbiosis, both of which are well-known to reduce iron absorption. In these situations, simply increasing the dose often doesn’t help unless the underlying gut issue is addressed.
Another frequent and overlooked factor is low stomach acid, which is necessary to convert iron into an absorbable form. Taking vitamin C alongside oral iron can improve absorption and is a commonly used strategy.
If these factors are addressed and iron levels still fail to improve, IV iron may be considered to more effectively replenish total body iron stores.
Important: This is general educational information. Iron deficiency can have multiple causes, and supplementation—especially IV iron—should only be done under the guidance of your physician, who can determine the appropriate evaluation and treatment for your specific situation.
I receive iron infusions and even with that have never gotten my ferritin above 25. I’m usually in the teens, have gone as low as 4. My question is - where is all that iron going? How could I receive weekly infusions for 4 weeks without an improvement and what is happening to all that iron that was infused into my body?
The question to ask here is “What process is preventing the body from holding onto the iron?”
When ferritin won’t rise after proper infusions, that’s a signal to investigate deeper—looking at inflammation markers, gastrointestinal health, menstrual blood loss, infection, and immune regulation—rather than simply giving more iron.
The most common reason is see is Inflammation blocking iron storage – when inflammation is present, the liver produces a hormone called hepcidin that traps iron inside cells so it can’t be stored as ferritin or used to make healthy red blood cells. In this situation, iron is in the body—but biologically unavailable.
This information is for educational purposes only and is not intended as personal medical advice. Anyone experiencing persistent low ferritin or anemia should work directly with a qualified healthcare professional for individualized evaluation and care.
I'm wondering why mold and candida usually drive ferritin too low and it recovers once treated. Do you think the mechanism there is intestinal mucosal inflammation ?
There's an epidemic of low normal ferritin . Not even in menstruating women but in most people I check they are below optimal .
So helpful. Perhaps a future paper on the relationship between ferritin and mast cells!
And so mine is low sent to hemo and all they say keep taking it keep waiting and feeling horrible so what do you recommend to restore levels?
There isn’t a single, universal answer to increasing iron. When oral iron isn’t improving labs, the more important question is why absorption is impaired in the first place.
Common contributors include intestinal inflammation or dysbiosis, both of which are well-known to reduce iron absorption. In these situations, simply increasing the dose often doesn’t help unless the underlying gut issue is addressed.
Another frequent and overlooked factor is low stomach acid, which is necessary to convert iron into an absorbable form. Taking vitamin C alongside oral iron can improve absorption and is a commonly used strategy.
If these factors are addressed and iron levels still fail to improve, IV iron may be considered to more effectively replenish total body iron stores.
Important: This is general educational information. Iron deficiency can have multiple causes, and supplementation—especially IV iron—should only be done under the guidance of your physician, who can determine the appropriate evaluation and treatment for your specific situation.
I receive iron infusions and even with that have never gotten my ferritin above 25. I’m usually in the teens, have gone as low as 4. My question is - where is all that iron going? How could I receive weekly infusions for 4 weeks without an improvement and what is happening to all that iron that was infused into my body?
Hi Kate
The question to ask here is “What process is preventing the body from holding onto the iron?”
When ferritin won’t rise after proper infusions, that’s a signal to investigate deeper—looking at inflammation markers, gastrointestinal health, menstrual blood loss, infection, and immune regulation—rather than simply giving more iron.
The most common reason is see is Inflammation blocking iron storage – when inflammation is present, the liver produces a hormone called hepcidin that traps iron inside cells so it can’t be stored as ferritin or used to make healthy red blood cells. In this situation, iron is in the body—but biologically unavailable.
This information is for educational purposes only and is not intended as personal medical advice. Anyone experiencing persistent low ferritin or anemia should work directly with a qualified healthcare professional for individualized evaluation and care.
Thank you for replying! I have a lot to consider.
I'm wondering why mold and candida usually drive ferritin too low and it recovers once treated. Do you think the mechanism there is intestinal mucosal inflammation ?
Candida and other fungal organisms inhibit iron absorption in the gut so low ferritin despite supplementation is common in that group
And what if ferritin is 100-200 mcg/L above reference?
If ferritin is 100–200 mcg/L above the reference range, it is most often a marker of inflammation.
The next thing to consider or exclude is iron excess from conditions like hereditary hemochromatosis or G6pd deficiency