Myths vs facts: Folsäure and blood sugar

There are recurring claims that folic acid (vitamin B9) can lower blood sugar or help with diabetes. However, the scientific evidence is weak. Folic acid is essential for cell division, DNA synthesis, and homocysteine metabolism. Some observational studies suggest a link between low folate levels and increased diabetes risk, but randomized controlled trials show no significant blood sugar-lowering effect from folic acid supplementation in people with normal or impaired glucose tolerance. A myth is that folic acid directly regulates blood sugar – this is not supported. Fact: Folic acid is important for overall health, especially during pregnancy, but it is not a blood sugar medication. A balanced diet rich in folate (leafy greens, legumes) is recommended, but supplementation solely for blood sugar control is not evidence-based. Caveat: The evidence is mixed; mechanistic studies and associations do not warrant clinical recommendations.