What is the MTHFR Gene Mutation?

MTHFR mutations are variants of a specific gene that codes for making the MTHFR enzyme. This enzyme plays an important role in a process called methylation. Methylation is one of three key processes that controls how our genes are expressed. It puts a tiny chemical tag on certain genes (depending on what signals your cells are getting from their external environment) to silence them. Other signals can lead to de-methylation, where methylation takes the tag away, allowing the genes to be expressed.