NosiFol Forte DuoActive is a dietary supplement that contains two inositols: myo-inositol and d-chiro-inositol and biologically active folate of the latest generation Quatrefolic. Unlike ordinary folic acid, quatrefolic is immediately ready for its functions in the human body. It is therefore beneficial in all individuals and especially in those who, due to genetic variation of the MTHFR gene, have a lower ability to activate folic acid to its biologically active form.