Does Food Trigger Your Eczema? The Answer Is More Complicated Than You Think

If you've ever cut out eggs, dairy, gluten, or prawns hoping your eczema would clear — you're not alone. Food feels like a controllable trigger. But most people are cutting the wrong things, and missing what actually matters.

Does food allergy cause eczema in adults?

In children under 5, food allergy affects about 30–40% of eczema cases — which is why the food-eczema connection is so deeply embedded in public understanding.

But in adults, confirmed IgE-mediated food allergy is present in only about 10–15% of eczema cases.

The other 85–90% of adults with eczema have no food allergy driving their skin condition. Their eczema is driven by barrier dysfunction, environmental triggers, and immune dysregulation — not food allergy.

This means most adults cutting out entire food groups based on self-diagnosis are eliminating foods that aren't actually causing the problem — while the real drivers continue unchecked.

So how does food actually affect eczema?

Food can still worsen eczema in adults — just through different pathways than allergy.

Histamine sensitivity: Eczema patients often have lower levels of diamine oxidase (DAO), the enzyme that breaks down histamine. Foods high in histamine — fermented foods, aged sauces, dried seafood — can push histamine load above the itch threshold. This doesn't show up on standard allergy testing, which is why people get tested, receive a negative result, and still react.

Gut health and inflammation: Poor gut microbiome diversity — from low-fibre diets and high sugar intake — reduces the bacteria that produce anti-inflammatory short-chain fatty acids. This raises systemic inflammation that worsens eczema through a separate pathway entirely. Standard allergy panels miss this completely.

These non-allergic pathways explain why many people have a genuine food-eczema connection that allergy testing doesn't validate.

The Malaysian diet and eczema: what to actually watch

In Malaysian cooking, high-histamine ingredients appear very commonly: belacan (fermented shrimp paste), dried anchovies (ikan bilis), dried shrimp, cincalok, oyster sauce, and salted fish.

A typical meal with multiple of these ingredients can push histamine load over the threshold — especially if you already have low DAO enzyme levels. This doesn't mean abandoning Malaysian food. It means identifying which meals correlate with flares, and whether high-histamine ingredients are the pattern.

High sugar and refined carbohydrates — bubble tea, sweetened kopi, refined rice dishes — also drive inflammation through the gut pathway. They selectively feed pro-inflammatory bacteria, shifting the microbiome balance in the wrong direction.

On the other side: tempeh and ulam (raw herbs) are already embedded in Malaysian food culture and are genuinely good for gut health. Intentionally including them more often is a practical, low-friction step.

What actually moves the needle for most people

Food investigation takes time and isn't guaranteed to produce results for the majority with eczema. While you're working through that process, maintaining your skin barrier with a well-formulated moisturiser consistently reduces flare frequency regardless of dietary triggers. REMDII Ultra Sensitive is formulated with a 3:1:1 ceramide ratio to help support and strengthen the skin's moisture barrier. A well-supported barrier is generally less reactive to everyday triggers.

How to actually test if food is affecting your eczema

Don't cut foods randomly. Keep a food and symptom diary for 3–4 weeks. Note what you ate and when your skin reacted — and pay attention to timing. Allergy reactions appear within 2 hours. Histamine and gut-based reactions can take 12–48 hours, which makes the connection much harder to spot without a diary.

If you identify a pattern, reduce that food first — don't eliminate it — and observe for 2 weeks.

For suspected food allergy, work with a dermatologist or dietitian. Unsupervised broad elimination diets carry real risks: nutritional deficiency, unnecessarily restricted eating, and often no clearer result than when you started.