Myths vs facts: FADS1 and gut health

FADS1 encodes a key enzyme in the conversion of omega-3 and omega-6 fatty acids. Myths often claim that specific FADS1 variants directly determine gut health – for example, by altering inflammation or microbiome composition. The evidence is limited: strongest support comes from GWAS linking FADS1 variants to blood fatty acid levels. Some studies suggest associations with inflammatory bowel disease, but effect sizes are small and not causal. Gut health is far more influenced by diet, fiber, microbial diversity, and lifestyle. A DNA test for FADS1 cannot reliably predict gut health status. MyBody-X or similar consumer tests may oversimplify these findings. Be cautious of marketing that labels FADS1 a 'gut gene'. Safety note: omega-3 supplementation should not be started without medical advice, especially if on blood thinners.