welche vitamine fehlen bei müdigkeit — what are common causes?

Fatigue is a common symptom with many potential causes, including nutrient deficiencies. The most frequently implicated are vitamin B12, vitamin D, iron (though not a vitamin, it's crucial for oxygen transport), folate, and other B vitamins. B12 deficiency is common in vegans, older adults, and those with gastrointestinal issues. Vitamin D insufficiency is widespread in regions with limited sun exposure. Iron deficiency often affects women with heavy menstruation or people with poor dietary intake. However, fatigue is non-specific – sleep deprivation, stress, thyroid disorders, and depression are equally common causes. Home finger-prick tests can offer a screening snapshot for vitamin D and B12, but venous blood draws are more accurate and allow broader interpretation. Always confirm abnormal results with a physician before supplementing. The evidence for these associations is based on general clinical practice rather than the specific context provided.