was essen für mehr energie — what are common causes?

The question of what to eat for more energy is common. Common causes of low energy include iron deficiency, vitamin D deficiency, poor sleep, stress, and unbalanced diets. The provided contexts do not contain specific studies on 'energy foods' but mention general nutrients like vitamin D and selenium. High CRP (inflammation) can also contribute to fatigue. Evidence-based advice: whole grains, fruits, vegetables, healthy fats, and adequate protein provide sustained energy. Caffeine and sugar offer short-term boosts but may lead to crashes. Caveat: The contexts lack direct evidence linking specific foods to increased energy. MyBody-X tests are screening tools, not diagnostic. Persistent fatigue warrants medical evaluation.