When you’re trying to conceive with endometriosis, food advice can feel overwhelming. One minute dairy is “fertility-friendly,” the next it’s inflammatory. Gluten is debated endlessly, and soy seems to swing between miracle food and hormone disruptor.
So what does the evidence actually say — and how do you know what’s right for your body?
Let’s break it down.
Why diet matters for fertility with endometriosis
Endometriosis is not a hormonal disease — it’s an inflammatory condition. That chronic, systemic inflammation affects fertility in several ways:
- It disrupts the ovarian environment and follicle development
- It can interfere with ovulation or block fallopian tubes
- It inflames the uterus, making embryo implantation harder
Reducing inflammation is therefore a key fertility strategy. And diet plays a major role in either calming or fuelling that inflammation.
This is where dairy, gluten, and soy come into the conversation.
Dairy and fertility: helpful or harmful?
Dairy is often controversial — and understandably so. For many people, giving up cheese feels like a huge loss (I get it).
From a fertility perspective, the research on dairy is mixed. Some studies suggest full-fat dairy may support fertility — but these studies did not include women with endometriosis.
That distinction matters.
In endometriosis, gut health is frequently compromised. If you have leaky gut, undigested dairy proteins can cross into the bloodstream, triggering an immune response and increasing inflammation. On top of that:
- Dairy often contains hormone residues
- Antibiotics used in dairy farming can affect gut bacteria
- Dairy intolerance is extremely common in endometriosis
For these reasons, I usually recommend removing dairy initially, especially when fertility is the goal.
If you do remove it, make sure you replace key nutrients such as calcium and iodine, and choose unsweetened plant milks to avoid blood-sugar spikes.
Gluten: one of the biggest fertility disruptors
Gluten is one of the most well-researched food triggers in endometriosis.
Research shows high rates of non-coeliac gluten sensitivity in people with endometriosis, even when coeliac disease is ruled out. Gluten can:
- Increase inflammation
- Worsen gut permeability
- Trigger fatigue, bloating, anxiety, and brain fog
- Interfere with nutrient absorption
- Affect thyroid function (which is critical for fertility)
If gluten proteins cross a damaged gut wall, the immune system reacts — and inflammation rises. Since inflammation directly impairs implantation, this matters.
For fertility support, removing gluten is one of the most impactful dietary changes you can make.
Soy: fertility friend or foe?
Soy is the most confusing of the three.
It contains phytoestrogens, which can interact with oestrogen receptors. Since endometriosis already produces oestrogen, adding phytoestrogens can be unpredictable.
Some studies suggest whole soy foods (like tofu or tempeh) may support fertility. However:
- These studies are not specific to endometriosis
- Many people with endometriosis are intolerant to soy
- Processed soy (common in ultra-processed foods) is far more problematic
Highly processed soy additives can worsen gut health and inflammation — which is why removing ultra-processed foods is often more important than removing whole soy outright.
If you are vegetarian or vegan, soy may still have a place — but it needs to be approached carefully and individually.
So… should you cut them out?
For most people with endometriosis who are trying to conceive:
- Gluten: yes, remove
- Dairy: yes, at least initially
- Soy: remove processed forms; assess whole soy individually
If removing gluten and dairy improves symptoms such as fatigue, bloating, bowel changes, or mood, that’s a strong sign they were contributing to inflammation — and therefore affecting fertility.
Focus on what to eat instead
Rather than obsessing over restriction, shift your focus to anti-inflammatory nourishment:
- Omega-3 rich foods (fatty fish, flaxseed, walnuts)
- Colourful vegetables and fruits
- Lean proteins and healthy fats
- Low-glycaemic carbohydrates
- Whole, minimally processed foods
And most importantly: personalisation matters. What supports fertility for one person may worsen symptoms for another.
If you’re unsure where to start, professional guidance can help you avoid nutrient deficiencies while reducing inflammation effectively.
I’ve created a free guide that explains how you can use diet and supplements to help improve your fertility. It’s called “5 strategies to improve your fertility naturally“ and you can download it here: https://www.subscribepage.com/5strategiesimprovefertilitynaturally