Bone Meal

Bone meal is a mixture of crushed and coarsely ground bones that is used as an organic fertilizer for plants and in animal feed. As a fertilizer, bone meal is primarily used as a source of phosphorus.

Bone meal once was often used as a dietary calcium supplement. Research in the 1980s found that many bone meal preparations were contaminated with lead and other toxic metals, and it is no longer recommended as a calcium source.