CALCIUM L-5-METHYLTETRAHYDROFOLATE, CAS No: 151533-22-1 is the biologically active form of folic acid. It is required for cell division and cell repair. Typically, folic acid undergoes a 4-step enzymatic process to produce LMF, which is the active form of folic acid. This product is 7 times more bioavailable than plain folic acid. Superior quality with pure L-enantiomer. More effective than folic acid. We have complete technical support available for your R&D needs.