Deer will seek out and ingest key dietary supplements that may be lacking in their area. About 5% of a deer's total weight is a composition of "minerals". The elements and compounds, generally comprising 2 major groups: macro-nutrients and micro-nutrients. These 2 groups are based on the amount needed or used, "macro" is required in larger amounts while; "micro" is needed or used in much smaller amounts. Both of these groups are important to deer. Macro-nutrients include Calcium, Phosphorus, Magnesium, Sodium, Potassium, and Sulfur. Micro-nutrients include Zinc, Copper, Iron, and Manganese. Deer have a remarkable ability to balance out their diets with nutrients they're otherwise lacking. Providing Jurassic Rock Mineral can help keep your herd healthy, thriving, and traveling in your area.