Calcium salts for pharmaceutical use, namely, for treating vitamin deficiency, low blood calcium, osteoporosis, osteomalica, hypoparathyroidism, heartburn, indigestion, and muscle disease, for prenatal nutritional supplementation, nutritional supplementation, and for use as an acidity regulator; chemical preparations containing calcium carbonate for pharmaceutical purposes, namely, for treating vitamin deficiency, low blood calcium, osteoporosis, osteomalica, hypoparathyroidism, heartburn, in...