WHAT IS THE SOURCE OF NATURAL CALM MAGNESIUM AND THE CALCIUM IN NATURAL CALM PLUS CALCIUM?

Natural Calm magnesium is extracted from ocean water. The citric acid in both the Natural Calm Magnesium Citrate Powder and the Calm Plus Calcium is sourced from sugar beets. The calcium in Natural Calm Plus Calcium is derived from Limestone, where it is extracted as calcium carbonate. Then gluconic acid is added to it to convert it into calcium gluconate.