Prairie Naturals Ionic Bone Solution 1:1 - A unique formula that combines calcium, magnesium, boron and vitamin D all in one great tasting liquid. Bone solution contains 100% absorbable ionic forms of calcium and magnesium plus emulsified vitamin D. Adequate intake of calcium is critical in maintaining optimum bone density. Magnesium and vitamin D are essential for absorption of calcium. Together these nutrients may provide your body with what it needs to help prevent osteoporosis. Bone solution is also beneficial for those who suffer from nervous system disorders, insomnia, and muscle cramping.