Redmond Iodized Block is nature’s perfect balance to nourish your livestock. These block’s sea salt comes from an ancient deposit and has a broad spectrum of trace minerals to nourish your livestock. This block is also fortified with 200 ppm iodine from ethylenediamine dihydriodide to assist cows with proper thyroid gland function, which generates hormones crucial for growth and metabolism. These salt blocks are stackable, easy to handle, and economical.