Calcium plays a critical role in many areas of health, including bone health. If blood calcium levels are low due to dietary intake, then the body uses calcium from our bones, which can affect their strength. Typical calcium supplements are derived from limestone rock-based calcium lacks many other bone-supportive nutrients. Bone strength takes care also supports movement, joint flexibility, and joint function. Many bone health supplements are made with calcium carbonate, which is 40% elemental calcium (calcium in its pure form) calcium needs other minerals and vitamins to work well in the body. Nearly half of Americans aren't getting enough Magnesium (atomic number 12) SILICA Silica is also known as silicon dioxide (SiO2) and can be taken in small amounts as a supplement for bones and healthy hair and nails. Calcium-Rich Red Marine Algae grows wild along the coast of Iceland. No pesticides, no algae raked off the beach and no animal bone. Just pure, responsibly sourced plant ingredients that deliver bone-strengthening calcium your body can recognize as food. New chapter suppliers follow a written code of conduct that covers sustainability, human rights, and fair working conditions. We compost, recycle or reuse more than 80% of the waste we produce.