Mixed

Commercial direct-to-consumer (DTC) genetic tests for personalized nutrition often lack scientific backing, provide insufficient result descriptions, and draw inferences that are not supported by robust evidence, particularly when based on single gene variants.

Be skeptical of DTC genetic nutrition tests. They are largely unregulated and often base advice on single genes, ignoring the complex polygenic nature of health. The paper states these tests often lack scientific backing. Use them for curiosity, not as a substitute for evidence-based dietary guidelines.