L-5-MTHF provides a natural, biologically active form of folate. Folate is essential for cell division and growth, and also works to balance the homocysteine pathway. This formula provides folate in the bioidentical, bioactive form, 5-methyltetrahydrofolate. L-5-MTHF is the active circulating form of folate found in the body and one of several forms found in food.