Yeah, they actually call it The Motherfucker Gene, so everyone else had the same thought, lol.
It actually stands for methylenetetrahydrofolate reductase, which is the enzyme that metabolizes folic acid into methylfolate. Most people have a bit of an issue with it, but mine is like 80% defunct. For example, taking extra folic acid supplements while pregnant would do almost nothing for the baby, because my body just won’t metabolize it. I have to take high doses of methylfolate instead to get the same benefits.
And thank you you! It really has been life-changing!