We took our multivitamin, Basic Maintenance without Iron, and re-created it to contain 2000 IU Vitamin D-3 and 400 mcg of 5-MTHF (L-5-methyltetrahydrofolate), the only form of folate to cross the blood-brain barrier. This multiple Vitamin/Mineral supplement has been scientifically formulated based on emerging research to provide valuable nutrients to support breast and colon health, cardiovascular health and immune health, as well as bone-supporting nutrients including vitamin D-3 and Boron. It also contains vitamins and minerals newly recognized for their potency and bioavailability, including carotenoids, B-12 (Methylcobalamin) and 5-MTHF (L-5-methyltetrahydrofolate).