Mthfr, what is it?

It represents a gene: This stands for methylenetetrahydrofolate reductase. You can read about it in more detail at this website. http://ghr.nlm.nih.gov/gene/mthfr.

A gene: It is a gene that has polymorphisms (differences) in up to 1/4 of people. There are two well studied polymorphisms, 677 and 1298. Each causes slightly different problems. 677 decreases methylfolate, and 1298 can cause neurotransmitter shortage.

MTHFR: MTHFR 677 and MTHFR 1298 are both genes.

An enzyme and a gene: Methylene tetrahydrofolate (folic acid) reductase is an enzyme involved in many processes, requiring amino acids, folate (folic acid) etc. . Mutations in this gene affect a large number of functions best explained in this location in a relatively understandable manner http://www.stopthethyroidmadness.com/mthfr/

A gene: Testing for this gene is being heavily promoted by an aggressive lab. A majority of people who are tested are told they have an abnormal result and are given a recommendation for some nutritional supplements. There's just enough science here that not testing might cause trouble, but most of us pathologists aren't buying it as a useful test for folks who seem healthy.