The detox gene (MTHFR) is rendered inactive when your diet is high in meat. Our diet should be 80% plant based or higher. Amazon.com: MTHFR Gene Methylation Test Kit. 1 on 1 Live Expert Support by Phone 7 Days A Week, MTHFR C677T and MTHFR A1298C Gene Variants for Methylation Analysis. Results in 2 5 Days. Ages 0+ : MTHFR, Hashimoto's, and Nutrients Dr. Izabella Wentz The Implication of a Polymorphism in the Methylenetetrahydrofolate Reductase Gene in Homocysteine Metabolism and Related Civilisation Diseases