SOURCE NATURALS - Mag Active - 8 fl. oz. (236 ml)DESCRIPTION Magnesium supports the heart, bones, and muscles, and plays a part in energy generation and in the immune, endocrine and nervous systems. Source Naturals Mag Active??? is a purified liquid concentrate of activated ionic magnesium, in a broad spectrum of many other essential and trace minerals. MAG ACTIVE is naturally derived from the Great Salt Lake and has had 99% of the sodium removed. DETAILS Package Description: 8 fl. oz. (236 ml)