A lot of people have heard about Magnesium Carbonate and its benefits. In specifc terms, it is not related a lot to food products. Instead, it is used mostly for construction purposes. It is used as an additive in the preparation of red colored bricks. One of the common purposes for which it is used is the preparation of chalk. It can cause skin dryness and various kinds of skin irritation as well. It is a common reason for skin itching as well.