What to watch with B12 and Allergie?

The combination of vitamin B12 and allergies is not directly addressed by the provided context. The FUT2 gene (fucosyltransferase 2) influences B12 absorption – certain variants can lead to lower B12 levels. Allergies are immune-mediated; a B12 deficiency could theoretically impair immune regulation, but there is no strong evidence from the given sources. Monitor your B12 status, especially if you carry FUT2 variants or follow a vegan diet. For allergies, adequate B12 and other micronutrient intake is sensible, but a direct causal link is not established. If uncertain, get a blood test and discuss results with a physician. The evidence level here is unclear.