Famous scientist Carl Sagan once said "we are made of star stuff." Consider the mineral magnesium: expelled from from dying stars, magnesium is one of the most abundant elements in the universe.
Swanson Albion Chelated Magnesium Glycinate 133 mg 180 Caps
Per GMP guidelines set forth by the FDA, most products are formulated for 24 months from the date of manufacture. Liquids and probiotics are formulated for 12 months.