New Chapter Bone Strength Take Care - Slim Tabs - A whole-food plant source of calcium, magnesium, and other important trace minerals. Derived from a specific plant form called Lithothamnion Calcareum, much like organic vegetables, this sea plant is allowed to mature naturally and then sustainably harvested to deliver its optimal nutritional value. The plant-based calcium found in Bone Strength Take Care grows in a honeycomb structure and is extremely porous, which dramatically increases the calcium’s surface area. Stomach acid can then come into greater contact with the calcium, making it easy to dissolve.