was ist eine stoffwechselstörung — what symptoms are typical?

A metabolic disorder is an abnormality in the body's normal metabolic processes, leading to dysfunction in nutrient processing, energy production, or waste elimination. Typical symptoms vary by disorder but may include fatigue, weight changes (gain or loss), digestive issues (bloating, diarrhea, constipation), increased infection susceptibility, skin changes (rash, dryness), or neurological symptoms (poor concentration, numbness). Examples from the context include diabetes (elevated blood sugar, thirst, frequent urination) or iron metabolism disorders (high or low ferritin, fatigue, joint pain). Diagnosis usually requires blood tests (e.g., fasting glucose, ferritin, CRP) and medical evaluation. Many metabolic disorders are treatable but not always curable. Important: A single self-test (e.g., ferritin without CRP) can be misleading because inflammation confounds results. The evidence is based on general medical knowledge; the provided context does not contain specific sources for this question.