The Exon Terra Calcium is a liquid Calcium-Magnesium supplement especially formulated for use with reptiles and amphibians. The mineral elements calcium and magnesium play an essential role in many of the body's most important functions.\n\calcium is a bone building mineral and is an integral part of the entire skeletal system. Magnesium stimulates the body's production of calcitonin, a hormone which supports healthy bone density. Calcium and magnesium also aid in regulating muscle contraction (such as heartbeat), nerve signals and hormone production.\n\nab major dietary problem in captive reptiles and amphibians is the low assimilation of calcium from their daily food. The Exon Terra Calcium contains 8% of highly absorbable elemental calcium and 1% Magnesium to help maintain a strong bone structure.\n\nab liquid supplement provides high absorption and assimilation because it passes directly into the small intestine.