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 nutr