Myths vs facts: FADS1 and sleep

FADS1 encodes enzymes involved in polyunsaturated fatty acid metabolism. Some observational studies suggest that certain FADS1 variants may be associated with sleep quality, possibly via inflammation or membrane fluidity. However, the evidence is limited and not causal. It is a myth that a FADS1 test can predict or diagnose sleep disorders. The fact is that any effect is small and modifiable by diet and lifestyle. Consumer DNA tests often overstate such links. For sleep issues, clinical evaluation and sleep hygiene are far more important than genetic testing. In summary, FADS1 genotyping has no proven clinical utility for sleep management.