What to watch with Nährstoffcheck and fertility?

The T allele of rs174546 in FADS1 is associated with reduced activity of the delta-5 desaturase enzyme, which converts shorter-chain omega-3 and omega-6 fatty acids into their longer-chain forms (e.g., EPA, DHA, and arachidonic acid). Population frequency is about 35 % in Europeans. GWAS data show that carriers tend to have lower blood levels of EPA and DHA, but the effect size is small – diet and lifestyle are far more influential. There is no strong clinical trial evidence that T-allele carriers must supplement with omega-3s. However, if your dietary intake of omega-3 is low, supplementation may be more beneficial for you than for non-carriers. A blood test (omega-3 index) is recommended before starting high-dose supplements. The MyBody-X test is a consumer genetic test, not a medical diagnostic; the 'diet type' label is marketing. Evidence level: gwas. Caveat: do not change your diet or supplements based solely on this SNP. Focus on overall dietary patterns rich in omega-3 sources (fatty fish, flaxseeds, walnuts).