5-MTHF Active MethylfolateThorne 5 MTHF provides methylfolate the biologically active, already methylated form of folate that cells use directly without conversion. Up to 40% of the population carries MTHFR gene variants reducing the efficiency of converting synthetic folic acid to active methylfolate by 3070%. For these individuals, supplementing 5 MTHF bypasses this metabolic bottleneck entirely, ensuring adequate methylation support for DNA synthesis, neural tube integrity,