The standard calcium supplement is usually as calcium carbonate which is associated for some people with nausea, flatulence and constipation. Wise Owl’s Calcium supplement is in a Food State, whole food matrix allowing the calcium to be better absorbed and utilised by the body where it is needed most. The supplement was formulated using baker's yeast to deliver the nutrient efficiently into the body. However, this was completely removed at the time of manufacture, so there are no concerns for people who experience yeast intolerance. One to two tablets daily as a food supplement or as directed by a practitioner.