What Is Magnesium Carbonate Powder? Magnesium carbonate powder contains an essential nutrient found in many foods. Magnesium carbonate (not to be confused with magnesium citrate) is an inorganic salt that is white in appearance with the chemical symbol MgCO3. Magnesium carbonate powder is insoluble and does not dissolve in water. Because of its insolubility, magnesium carbonate is often used in table salts to prevent clumping. Also, often referred to as “chalk,” magnesium carbonate is commonly used by athletes as a drying agent to aid with grip in sports like rock climbing, gymnastics, baseball, and weight lifting. Magnesium Carbonate Powder Benefits Magnesium carbonate powder may help maintain overall health and wellness.† Magnesium is used in more than 300 different reactions in the body and may help maintain healthy heart function.† Magnesium carbonate powder may aid in digestion, support oral and bone health, fortify the immune system, and aid healthy sleep.† Magnesium carbonate is also commonly used in skin products to help promote healthy skin. Source of magnesium Helps reduce stomach acid† Aids digestion† Supports heart function† Aids healthy sleep† Fortifies the immune system† Promotes healthy teeth & bones† Works to maintain healthy skin† The efficiency of magnesium supplementation may increase when taking calcium supplements along with it.† For best results it is recommended that magnesium be consumed at a ratio of 1:2 with Calcium.