Pure Encapsulations MethylAssist 90 Veggie CapsMethylAssist With Metafolin L 5 MTHF MethylAssist provides activated B vitamins, including Metafolin L 5 methyltetrahydrofolate (L 5 MTHF), to promote nutrient metabolism. Activated B vitamins are particularly important for providing methyl groups involved in the methylation cycle. Methylation involves the transfer of a methyl group (CH3) from one molecule to another. Vitamin B12 and folate are required by the enzyme that produces methionine. Folate