welche stoffwechseltypen gibt es — what does this mean exactly?

The term 'metabolic types' originates from popular diet concepts (e.g., 'Metabolic Typing' by William Wolcott), which claim that people respond differently to carbohydrates, fats, or proteins based on genetic predisposition. Three main types are often described: carb type, protein type, and mixed type. However, scientific evidence for this classification is weak. Neither genetic analysis nor specific metabolic markers allow a reliable typing that would yield clinically actionable dietary recommendations. Most studies indicate that individual metabolic differences are complex and cannot be reduced to a few types. MyBody-X does not offer a specific 'metabolic type' analysis; its tests (e.g., for FTO, MC4R) show only small effect sizes and are not validated for typing. Consumers should be skeptical of oversimplified typologies and instead rely on balanced nutrition and professional medical advice.