This test is used to determine whether you have one of two MTHFR mutations; A1298C or C677T. It is often used if other tests reveal that your blood homocysteine levels are greater than usual. Homocysteine levels may be raised by conditions such as excessive cholesterol, thyroid illness, and nutritional deficits. In this case, you can use MTHFR test kit in MTHFR Doctors at an affordable price.