5-MTHF plus forte5 MTHF Plus Forte supplies folate in the active form of calcium methylfolate, glucosamine salt. 5 MTHF Plus Forte is a highly absorbable, activated form of folate, which does not require enzymatic conversion to 5 methylfolate in the body. The glucosamine salt form utilized in 5 MTHF Plus Forte is more stable than other forms of methylfolate often used. Each serving (1 2 tablet) of 5 MTHF Plus Forte contains 2,500 mcg of folate.