“Cut out gluten and your eczema will clear”, advice like this fills social media and patient forums. What does the actual research show? The honest answer is nuanced: some dietary factors have good evidence, others are plausible but unproven.
What Has Good Evidence
Mediterranean diet and psoriasis. Multiple studies associate adherence to a Mediterranean diet, high in vegetables, fruit, whole grains, olive oil, and fish, with reduced psoriasis severity. The anti-inflammatory properties of this dietary pattern are biologically plausible.
Obesity and inflammatory skin disease. This has the strongest evidence. Obesity is independently associated with worse psoriasis severity and poorer treatment response. Adipose tissue is an active source of inflammatory cytokines. Weight loss consistently improves psoriasis severity scores.
Alcohol and psoriasis. Alcohol is a well-documented psoriasis trigger, it increases gut permeability, dysregulates immune function, and may directly stimulate keratinocyte proliferation.
What Is Plausible But Less Certain
Elimination diets for atopic dermatitis. In young children with severe eczema, specific food allergies (milk, egg, peanut, wheat, soy) can contribute to flares in a subset of patients. However, broad elimination diets in older children and adults are more likely to cause nutritional harm than skin benefit. Food allergy testing before elimination is essential.
Omega-3 fatty acids. Anti-inflammatory effects are well-established systemically. Evidence for direct benefit in atopic dermatitis and psoriasis is suggestive but not definitive.
What Lacks Evidence
- Gluten-free diet for eczema (unless celiac disease is confirmed)
- Sugar elimination for eczema (no well-controlled evidence)
Diet supports skin management but is rarely sufficient as a standalone treatment for moderate-to-severe inflammatory skin disease.
NuLine’s clinical trials evaluate treatments with rigorous evidence.