Rainbow Light Food-Based Calcium provides the added bone density support you need every day in just one tablet. Formulated with a two-to-one ratio of 500 milligrams of calcium to 250 milligrams of magnesium, this formula also contains mineral rich stinging nettle, horsetail, and organic spirulina to support bones, relax muscles, and help with digestion and utilization*. Food-Based Calcium is safe and easy on the stomach. When taken as directed, it can help support bone health. (Packaging May Vary)