Magnesium is critical for maintaining normal muscle and nerve function, keeping the heart rhythm steady, supporting a healthy immune system and keeping our bones strong. Magnesium BisGlycinate 200 is a premium magnesium supplement providing a highly absorbable dose of 200mg of pure elemental magnesium. Magnesium BisGlycinate 200 contains up to twenty percent (20-Percent ) more elemental magnesium than other magnesium supplements and can be up to five (5) times more absorbable. the bisglycinate form of magnesium is easy and gentle on the bowels. [VCAPS] Symptoms of magnesium deficiency can include anxiety, fatigue, irritability, loss of appetite, migraines, muscle weakness and spasms, insomnia, mental confusion, nausea, vomiting, loss of appetite, numbness and tingling.