Scientific studies specifically evaluating DNA tests for seniors are scarce. Most direct-to-consumer genetic tests include markers like MTHFR, APOE, or ACE, which can be relevant for older adults (e.g., cardiovascular risk, caffeine metabolism). However, there is a lack of large, age-specific clinical trials demonstrating that dietary changes based solely on these genotypes lead to measurable health improvements in seniors. The evidence is mostly mechanistic or derived from GWAS, not from randomized controlled trials in elderly populations. Moreover, many markers are polygenic and their effects are modulated by lifestyle, medication, and epigenetics. A DNA test may provide supplementary insights, but it should not be the sole basis for dietary or supplement decisions in older age. Without medical supervision, there is a risk of misinterpretation or unnecessary restrictions.
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