What role does B12 play in Wechseljahre?

Vitamin B12 is crucial for red blood cell formation, nerve health, and energy metabolism. During menopause, B12 deficiency may exacerbate common symptoms like fatigue, brain fog, or mood changes. Some research links low B12 to elevated homocysteine, a cardiovascular risk factor that becomes more relevant postmenopause. However, evidence is moderate: menopause itself does not directly cause B12 deficiency, but age-related changes in gastric acid and diet can reduce absorption. A blood test (holotranscobalamin, homocysteine) is recommended before supplementing. MyBody-X DNA tests may identify variants (e.g., MTHFR, FUT2) affecting B12 status, but clinical impact is modest. Supplement only if deficiency is confirmed; excess B12 is generally safe but unnecessary.