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Your question about the cost of a genetic test guide and the basics of what a genetic test is is valid, but the provided context does not include a specific guide or price overview on this topic. Instead, it contains information about MyBody-X products such as the DNA metabolism test (Slim/WeightLoss) for €169 and the AllergyCheck (IgE antibody test) for €159. In general, a genetic test analyzes sections of DNA to identify genetic predispositions – for example, for metabolism, nutrition, or sports type. However, the predictive power is limited: these are lifestyle tests, not medical diagnoses. Results are based on association studies (GWAS) and are often not clinically validated. Costs vary depending on scope (single genes vs. whole exome). Consumers should understand that a genetic test cannot rule out or predict diseases. The evidence is mostly marketing-driven; real clinical relevance is often low. Safety note: Do not make decisions about medication or therapy based solely on a genetic test. For specific medical questions, consult a physician or human geneticist.