Is FUT2 useful for Sport?

The provided context does not contain direct information on the usefulness of FUT2 for sport. FUT2 (fucosyltransferase 2) is a gene that determines secretor status and influences gut microbiome composition and vitamin B12 absorption. Some studies suggest a potential link between FUT2 status and athletic performance, possibly through B12 status and gut health. However, the evidence is mostly mechanistic and not robust enough to support clear recommendations for athletes. Without specific data from the given context, the utility remains uncertain. A FUT2 genetic test may offer supplementary insights, but it should not be the sole basis for training or dietary decisions.