Most of the vitamins and minerals in the multivitamin and mineral formulas, including Bone Structure, are from the fresh farm ingredients or from food sources such as organic algae (calcium), lichen (vitamin D3), sunflower oil (vitamin E), natto (vitamin K2), Indian gooseberry (vitamin C), selenium (sprouted garlic), Dunaliella salina (beta carotene), kelp (iodine), marigold flowers (lutein) and tomatoes (lycopene). Our proprietary formulas also utilize activated forms of vitamins to ensure that meaningful levels of key nutrients are delivered in the bioactive whole food formula.