Trace Minerals Liquid Ionic Magnesium is a rich, concentrated liquid dietary supplement that provides magnesium in ionic form – the form most widely recognized by the body. With more than 72 minerals extracted gently by evaporation from the Great Salt Lake, Liquid Ionic Magnesium is an unparalleled product available in the body-ready form. Using the metered dropper, take 4mL (4 full droppers) daily with juice or food to mask the concentrated mineral flavor. Do not refrigerate. Our proprietary process ensures maximum absorption, while the balanced liquid form provides safety and flexibility. 4 oz is about a 30-day supply. We are America s #1 Trace Minerals Supplement Brand. Since 1972, Trace Minerals' branded products have been recognized around the world as the pioneer of ionic trace mineral products that have supported consumers in living healthy lives.