If you're living with Endometriosis and constantly feeling wiped out, foggy, or like your body just won’t cooperate—iron deficiency could be playing a much bigger role than you think.
Fatigue is one of the most common complaints among women with Endometriosis. It’s often brushed off as “just part of the condition,” but the truth is, iron deficiency is often the silent driver of that relentless exhaustion. And the longer it goes undetected or unmanaged, the worse it can get.
Why Iron Deficiency is Common in Endometriosis
Let’s start with the basics. Endometriosis doesn’t just cause pain and fertility challenges—it also contributes to heavy or prolonged menstrual bleeding. For many, that monthly loss of blood results in significant iron depletion. Here’s what that means:
- Heavier bleeding = more blood loss
- More blood loss = more iron loss
- More iron loss = lower oxygen delivery throughout the body
That’s why so many women with Endometriosis experience:
- Chronic fatigue
- Breathlessness
- Dizziness
- Pale skin
- Headaches
- Brain fog
In short: you’re running on empty. Your body doesn’t have the iron it needs to move oxygen to your muscles, brain, and cells.
And it gets more complicated…
Iron Does Far More Than Fight Fatigue
Most people associate iron with energy—and rightly so. But it also plays a role in:
- Hormone synthesis: Your body needs iron to produce and metabolise estrogen and progesterone.
- Immune function: Iron helps immune cells mature and respond to threats.
- Brain function: Low iron can affect concentration, mood, and memory.
- Muscle performance: Muscles (including your uterus!) depend on oxygen for contraction and repair.
So, if you’re dealing with Endometriosis and feel like your mood, energy, cycles, and even mental clarity are “off,” iron deficiency could be a hidden culprit.
Why Diet Alone Might Not Be Enough
Even if you eat a diet that includes iron-rich foods, it doesn’t guarantee you’re absorbing enough.
That’s because iron absorption starts in the gut—and for many people with Endometriosis, gut function is already compromised.
Women with Endometriosis often experience:
- Leaky gut: A damaged gut lining that reduces nutrient absorption.
- Inflamed gut: Chronic inflammation makes nutrient uptake more difficult.
- Dysbiosis: An imbalance in gut bacteria can impair the digestive process.
This means that even if you eat all the “right” foods, your body might not be able to access the iron inside them.
Haem vs Non-Haem Iron: Why It Matters
There are two types of iron found in food:
- Haem iron
- Found in animal products like red meat, poultry, and fish
- Easily absorbed by the body
- Not affected by other nutrients
- Non-haem iron
- Found in plant-based foods like leafy greens, lentils, seeds, and fortified cereals
- Less bioavailable
- Easily blocked by other foods like dairy or coffee
If you eat a plant-based or mostly vegetarian diet, all your iron comes from non-haem sources. That doesn’t mean you can’t get enough iron—it just means you have to be more strategic.
What Boosts or Blocks Iron Absorption?
Here are some tips to get the most from the iron in your food:
- Pair Iron with Vitamin C. Vitamin C increases the absorption of non-haem iron by up to 300%! Add citrus fruits, red capsicum, tomatoes, and broccoli to iron-rich meals.
- Don’t Combine Iron with Calcium. Calcium competes with iron for absorption. Avoid combining iron-rich meals with dairy, calcium-fortified foods, or calcium supplements.
- Cook in Cast Iron. Using cast iron cookware can naturally boost the iron content in your food—especially acidic foods like tomatoes or lemon-based sauces.
- Limit Coffee and Tea with Meals. Tannins in coffee and tea can block iron absorption. Try to wait at least an hour before or after meals to enjoy your cuppa.
What About Iron Supplements?
If your iron levels are very low, you might need a supplement—but not all iron supplements are created equal.
Some common issues with iron supplements are:
- Constipation
- Bloating or cramping
- Worsened Endo symptoms (especially if Endometriosis is on or near the bowel)
Here’s what to look for in an iron supplement:
- Gentler forms of iron: ferrous bisglycinate or iron amino acid chelates
- Low-dose options: More is not always better. Smaller doses taken consistently are more effective and less irritating.
- Liquid iron: Sometimes better tolerated for those with gut issues.
And always talk to your GP or a practitioner who understands Endometriosis before starting any supplement.
Testing: What to Ask Your Doctor
Many GPs will check your haemoglobin, but this only reflects iron in your red blood cells—not your stored iron.
Ask for a ferritin test, which measures iron stored in your tissues. Ideally, your ferritin should be in the 50–100 range for optimal function (though lab reference ranges often say 15 is “normal”).
If your ferritin is low—even if your haemoglobin is normal—you may still experience fatigue, brain fog, and poor immunity.
A Final Word of Encouragement
Many women with Endometriosis accept fatigue as “just the way things are.” But iron deficiency is treatable—and correcting it could significantly improve your energy, mood, and resilience.
Whether you eat meat or follow a plant-based diet, there are tools you can use to feel better. If you're feeling constantly tired, don't dismiss it. Ask questions, get tested, and nourish your body with what it truly needs.
You deserve energy. You deserve clarity. And you deserve a body that feels like it’s working with you—not against you.
I’ve created a free guide “5 Steps to reducing your Endometriosis symptoms with nutrition”. This guide will get you started on changing your diet and reduce the severity of your symptoms, including fatigue.
If that sounds good, download your copy of the guide now: https://www.subscribepage.com/5stepstoreducingyourendometriosissymptomswithnutrition