Can FADS1 help with fatigue?

FADS1 encodes an enzyme critical for converting omega-3 fatty acids (ALA to EPA/DHA). These fats influence inflammation and cellular energy. Some research suggests that certain FADS1 variants are linked to lower omega-3 levels and higher inflammatory markers, which could theoretically contribute to fatigue. However, direct evidence connecting FADS1 to chronic fatigue is weak and mostly mechanistic. The effect sizes are small and confounded by diet, lifestyle, and other genetic factors. A DNA test can only hint at whether an individual might benefit from optimizing omega-3 intake. It cannot diagnose or treat fatigue. Evidence: mechanistic/unclear. Caveat: Do not use genetic results alone to make health decisions; consult a clinician for persistent fatigue.