Key Benefits of Biocare Nutrisorb Liquid Methyl Folguard: Biocare Nutrisorb Methyl FolGuard is a high potency liquid supplement of optimally bioavailable, metabolically active forms of vitamin B12 (as Methylcobalamin) and folate (as Methylfolate) to support healthy methylation. Nutrisorb Methyl FolGuard is a high potency liquid supplement of high potency, naturally active forms of vitamin B12 (as Methylcobalamin) and folate (as Methylfolate). Nutrisorb Methyl FolGuard contains folate as methylfolate or 5-MTHF. 5-MTHF is the natural form of folate found in food such as leafy green vegetables and is already active and ready for the body to use. We use Quatrefolic, the most advanced form of folate supplementation available, with optimum stability and bioavailability. Nutrisorb Methyl FolGuar