welche vitamine bei erschöpfung — when to see a doctor?

Fatigue is a common symptom with many potential causes, including sleep deprivation, stress, and nutritional deficiencies. Vitamins such as B12, D, iron, and folate are frequently discussed, but self-supplementation without proper diagnosis is not evidence-based. A blood test (e.g., from MyBody-X) can identify deficiencies, but it does not replace a medical evaluation. When to see a doctor? If fatigue persists for weeks, is accompanied by red flags (unexplained weight loss, fever, night sweats), or interferes with daily functioning. Also seek medical advice if you have known risk factors (e.g., vegan diet, gastrointestinal disorders). The evidence for general vitamin supplementation in fatigue is limited; targeted testing and clinical guidance are essential.