碳酸鈣
Presently, consumption of extensively large amounts of calcium carbonate has replaced the over-ingestion of milk products, or milk and bicarbonate, as the most prominent cause of MAS. Excessive consumption of calcium generally means taking in more than 4 to 5 g of calcium carbonate every day. This can be attributed to the greater availability of over-the-counter calcium carbonate supplements to treat osteoporosis and dyspepsia, as well as the growing awareness among consumers of the potential health benefits of calcium intake. Calcium carbonate is also often prescribed to people with chronic kidney disease for the prevention of secondary hyperparathyroidism and to people receiving prolonged corticosteroid therapy that may lead to bone loss, putting them at a higher risk of calcium over-consumption and developing MAS.