Myths vs facts: Ferritin Eisenmangel and fertility

The FUT2 rs601338 variant influences gut microbiome composition (e.g., Bifidobacterium), but no direct effect on LDL cholesterol is established. The link between microbiome and blood lipids is indirect and not clinically validated for this SNP. Therefore, a DNA test for this variant does not provide a reliable basis for lowering LDL. Focus should be on established measures such as diet, exercise, and physician-supervised statin therapy. Evidence: mechanistic.