welche vitamine helfen bei müdigkeit — can a DNA test help?

Fatigue is multifactorial – sleep, stress, diet, and underlying conditions all play a role. Vitamins such as B12, B6, folate, vitamin D, iron, and magnesium are commonly linked to energy levels. A DNA test (e.g., from MyBody-X) can detect variants in genes like FUT2 (affecting B12 absorption) or MTHFR (folate metabolism). However, the effect sizes are small, and a genetic predisposition does not equal a deficiency. Blood tests remain the gold standard for diagnosing actual nutrient shortfalls. Evidence that DNA tests directly help with fatigue is limited (human-moderate/mechanistic). Self-supplementing without lab confirmation can be risky – especially with iron or B6. A DNA test may offer clues, but it is not a substitute for clinical evaluation. For fatigue, start with a doctor’s check-up and targeted blood work.