MTHFR - SalivaMTHFR will give you information on methylation and detoxification pathways. Product Description. If you are unsure of which types of B vitamins such as B12, B6, and B9(Folate) are most efficient and effective for you, MTHFR genetics would help you. This test provides information about your genetics and insight on how to reduce associated health risks. To prepare for genetics testing, fasting is not required. No specific preparation is necessary.