Check the listing for details. Natural Source Colloidal Zinc, Copper & Magnesium - Eight Oz Bottle. Condition: New. Listed at 16.46 USD. These highly absorbable, water-soluble colloidal minerals are derived from shale deposits in Utah, which were formed when plant life underwent natural decomposition during the prehistoric eras.Supplying 74 trace minerals in each serving, Piping Rock’s liquid Colloidal Minerals deliver these potent, beneficial nutrients in an easy-to-use unflavored formula!Contains many naturally-occurring trace minerals, including: Boron, Calcium, Chromium, Copper, Iodine, Iron, Magnesium, Manganese, Molybdenum, Nickel, Phosphorus, Potassium, Selenium, Silver, Sodium, Sulfur, Tin, & Zinc.Other ingredients: Purified Water, Citric Acid, Fulvic Acid, Potassium Sorbate (Preservative), Potassium Benzoate (Preservative) Suggested use: Adults 10 drops daily Children 5 drops daily Servings Per 8oz Container: 480 All items all sanitized with UV Lights before shipment!