If you have MTHFR , or think you might , this is the most important connection in this series. MTHFR is a gene mutation that impairs methylation. And methylation is the If you've ever been told you have the MTHFR mutation or you've just felt off for yearsthis might explain it. Looking back, it explains a LOT of my life but I really MTHFR Gene Mutations Explained: Symptoms, Risks & Testing Guide Glutathione Injection: Cost, Benefits, and Side Effects Glutathione L Injection Wells Pharmacy Network