Source Naturals Mag Active, Quick Absorption Magnesium Stress Support , 4 Fluid Ounces Size:4 Ounce Supports the heart, bones, and muscles, and plays a part in energy generation and in the immune, endocrine, and nervous systems;Is a purified liquid concentrate of activated ionic magnesium;Naturally derived for the Great Salt Lake and has had 99% of the sodium removed Features: Supports the heart, bones, and muscles, and plays a part in energy generation and in the immune, endocrine, and nervous systems Is a purified liquid concentrate of activated ionic magnesium Naturally derived for the Great Salt Lake and has had 99% of the sodium removed Product Details: Product Dimensions: 1.9 x 1.9 x 5.3 inches ; 8.6 ounces Shipping Weight: 9.6 ounces Domestic Shipping: Currently, item can be shipped only within the U.S. and to APO/FPO addresses. For APO/FPO shipments, please check with the manufacturer regarding warranty and support issues. International Shipping: This item is not eligible for international shipping. Learn More UPC: 021078021834 Item model number: SN2183