Can FADS1 help with gut health?

FADS1 encodes a delta-5 desaturase involved in converting linoleic acid to arachidonic acid and alpha-linolenic acid to EPA/DHA. These polyunsaturated fatty acids (PUFAs) modulate inflammation and cell membrane function, both relevant to gut health. Some studies link FADS1 variants to inflammatory bowel disease (IBD) risk, but effects are modest and not clinically actionable. Gut health is primarily shaped by diet, microbiome, and lifestyle. A DNA test for FADS1 may indicate a tendency but cannot diagnose or guide specific probiotic or fatty acid supplementation without measured biomarkers (e.g., serum PUFA levels, inflammatory markers). Evidence: human-moderate (observational, GWAS). Caveat: no established clinical cutoffs for FADS1 genotypes; consumer tests often overstate single SNP effects.