Can Folsäure help with skin aging?

Folic acid (vitamin B9) is essential for DNA synthesis, repair, and methylation processes that could theoretically influence skin aging. Some observational studies suggest a link between low folate levels and increased skin aging, but robust clinical evidence for a direct anti-aging effect from supplementation is lacking. High doses of folic acid (especially synthetic) may even pose risks (e.g., masking vitamin B12 deficiency). For skin health, a balanced diet with natural folate sources (leafy greens, legumes), sun protection, and good skincare are proven to be more effective. The evidence for folic acid as an anti-aging agent is weak and primarily based on mechanistic reasoning.