#1 Natural Multivitamin Brand With Magnesium & Vitamin D3 Supports Bone Density & Muscle Relaxation Promotes Enhanced Absorption & Utilization Gentle on the Stomach with Whole Foods Gluten-Free Dairy-Free Dietary Supplement BPA-Free BottleFood-based, enhanced-absorption bone-builder.Just one tablet per day helps build bone and relax muscles. Provides 500 mg of calcium - the exact amount the body can absorb at one time - plus co-factors necessary for calcium absorption & utilization, as well as whole foods for easy digestion.Helps build and strengthen bones & teeth. 2:1 calcium to magnesium ratio.Supports muscle relaxation & bone flexibility. Magnesium • 500 IU vitamin D3.Promotes enhanced calcium absorption & utilization. Magnesium • vitamin D3 • food-based.Gentle on the stomach: can be taken with or between meals. Mineral-rich whole foods • organic spirulina • betaine HCl.