Is Folsäure useful for Blutzucker?

The question of whether folic acid is useful for blood sugar control lacks strong evidence. Folic acid (vitamin B9) is crucial for cell division and homocysteine metabolism. Some observational studies suggest an inverse association between folate status and diabetes risk, but randomized controlled trials have not demonstrated a clear benefit of folic acid supplementation on glucose levels. High-dose folic acid can also mask vitamin B12 deficiency, a concern for older adults and vegans. For blood sugar management, established lifestyle interventions and medications remain the standard. A folic acid test (e.g., via MyBody-X) may identify deficiency, but using it solely to lower blood sugar is not evidence-based. Evidence grade: mixed (observational, mechanistic).