Myths vs facts: Magnesium and Allergie

The question about FADS1 and omega-3s is scientifically relevant, but evidence for direct action from a DNA test is weak. FADS1 variants (e.g., rs174537) do influence the conversion of plant-based alpha-linolenic acid (ALA) into active EPA and DHA. However, the effect is moderate and modulated by diet, sex, hormones, and other genes. A MyBody-X test can detect this variant, but interpretation is not straightforward: even with a 'less efficient' variant, increased intake of preformed EPA/DHA (e.g., from fish oil) can meet needs. Blood levels (Omega-3 Index) are more informative than genetics alone. Evidence is rated 'unclear' because study results are heterogeneous and no clinically validated DNA-based supplementation thresholds exist. Caution: Do not take high doses without medical supervision, especially if on blood thinners.