I go to a functional doctor in Tulsa Oklahoma actually Jenks which is a suburb of Tulsa. He tested and has a laboratory that works with him that has offered to do the testing for whatever the insurance pays and at the time my insurance did pay a little bit. It was a blood test and yes they did test for homocysteine levels and yes after that they told me that I needed methylated B vitamins. The folate thing was really eye-opening to me because I have been taking folic acid for years thinking I was doing a good thing and probably causing myself some trouble most notably anxiety! As soon as I got on the methylated B vitamins anxiety levels went way down like 85%. I’m scheduled to go back soon and they want to retest homocysteine levels because I was in the yellow zone not the red zone but definitely the little bit of a danger zone.