THE ENDOLLS NOTEBOOK · ARCHIVE
The Iron Paradox in Endometriosis and Adenomyosis
July 30, 2026
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Full transcript of the original video, lightly edited for readability.
One of the biggest mistakes we make when discussing low iron in endometriosis and adenomyosis is reducing the entire problem to one singular sentence. You bleed heavily, so take some iron pills. And yes, blood loss matters. And adenomyosis, especially heavy, prolonged menstrual bleeding, can become a severe enough problem to produce clinically significant anemia. However, the mainstream explanation of blood leaving the body may be only one side of the story, and my theory directly focuses on another aspect. So let's talk about it, because what I'm exploring in my hypothesis is an iron paradox.
The woman may be systemically iron depleted, while the disease environment itself is locally overloaded with blood products, he iron and oxidative stress. In other words, the body is starving for usable iron, while the lesions may be sitting in an iron rich, toxic environment. Once you understand that distinction, the fatigue, dizziness, weakness, and heart pounding begin to make far more sense. Because iron is not only needed to make hemoglobin, it is also essential for oxygen delivery, mitochondrial respiration, energy production, muscle function, and normal brain chemistry.
So when usable iron falls, the entire body begins operating as though it is running on reserve power. That is why iron deficiency does not always feel like ordinary tiredness. It can feel like your muscles are empty, like standing makes you dizzy, like walking upstairs takes more oxygen than your body can provide, like your heart is trying to compensate for something. Your blood Can no longer carry efficiently. Now, the first root into this problem is obvious. External blood loss. Adenomyosis can produce extremely heavy, prolonged and clotted bleeding.
The uterus may be enlarged, its contractility altered, and the tissue may undergo repeated cycles of bleeding and inflammation. This means every cycle can remove more iron from the body than the intestines can realistically replace. Ferritin begins falling. When this continues for months or years, the body's iron reserves can become nearly exhausted. But endometriosis introduces a second route that no one seems to talk about. Internal bleeding. Lesions bleed into the tissues around them. An ovarian endometrioma is the clearest example. These contain old, degraded blood that does not exit the body normally.
The blood remains trapped. Red blood cells break apart, hemoglobin is released, and iron becomes available within the lesion environment. Now the immune system has to clean it up. That task falls heavily on macrophages, which engulf the damaged cells and debris. Normally, that iron should eventually be recycled, but chronic inflammation changes that process. When macrophages become overloaded, they turn into heme iron laden macrophages, essentially immune cells packed with stored iron. So the body may technically still contain iron, but it is not available where it is needed, like the bone marrow or mitochondria.
This is where the paradox begins. Iron is being lost externally through bleeding, while internally it's accumulating in the wrong compartment. And inflammation acts like a lock around the remaining supply. That lock Is hepcidin the body's master iron regulating hormone. When inflammatory signals, especially IL-6, rise, the liver increases hepcidin production. Hepcidin then binds to ferritin, the export channel that allows iron to leave cells and enter the bloodstream. When the export door closes, dietary iron becomes harder to absorb and stored iron harder to release.
The body enters functional iron deficiency. This is also why ferritin can become confusing. Ferritin reflects storage, but it is also an acute phase reactant. Inflammation can push ferritin upward, making a result appear acceptable even when tissues remain functionally iron starved. That doesn't mean ferritin is useless. It means it must be interpreted in context alongside serum iron and symptoms. Now we reach the core of my hypothesis. The lesion environment is redox active. Free iron reacts with hydrogen peroxide through the Fenton reaction.
This produces hydroxyl radicals, among the most destructive species in biology, attacking membranes, proteins, and DNA. Excessive iron dependent lipid damage should push the cell toward ferroptosis, a form of regulated cell death. But the lesion survives. How can it live inside an environment that should destroy it? My proposed answer is selective redox survival. The lesion preserves enough antioxidant Protection to prevent death while allowing enough oxidative signaling to support inflammation and fibrosis. One of the most important defenses may be GPX4, which neutralizes lipid hydroperoxides and protects membranes from ferroptosis.
If these cells increase GPX4 activity, they may resist The iron driven death that should eliminate them. This allows the lesion to inhabit a toxic environment while surrounding tissues absorb much of the collateral damage. The lesion avoids death, but the ovary and nerves remain exposed to oxidative pressure, driving more inflammation and injury. Reactive oxygen species function as signaling molecules, activating pathways associated with survival and angiogenesis. The lesion preserves the signaling advantage of oxidative stress while defending itself against the final lethal consequence.
Simply put, you're not iron starved. Iron is being redirected to the lesions. The lesions use it to damage the area around it. All the while they are predisposed to the genes that will protect them from iron induced damage. That is what makes this bigger than a simple deficiency. The bloodstream becomes iron starved while the pelvic environment becomes iron stressed. This helps explain why oral iron does not always produce improvement. Inflammation may be limiting absorption and iron release. So the answer is not to assume iron doesn't work, but to determine where the bottleneck actually is.
Adenomyosis deserves special attention. Its bleeding burden can be enormous, hit from both directions loss and inflammation. These women should never be dismissed as simply tired. Their bodies are involved in an iron war. One side is losing iron, one side is trapping it. The future of research belongs to the interaction between all these systems. An iron sits directly in the middle of that intersection. When a woman says she feels dizzy, weak, breathless, Or exhausted. Believe her. Check the full clinical picture. She may not simply need more iron.
She may need someone that understands why her body keeps losing it and why a disease can thrive in toxicity.
