Calcium carbonate and vitamin D3 chewable tablets are the main ingredients of calcium carbonate and vitamin D3, of which calcium carbonate is a common clinical ingredient used in the treatment of calcium deficiency, which is effective in the treatment of osteoporosis and other clinical symptoms caused by calcium deficiency, such as cramps, panic, sweating or weakness. Vitamin D3 is an essential component of calcium synthesis and skeletal deposition, and vitamin D3 deficiency can lead to calcium deficiency and osteoporosis, so these two ingredients can be used together to treat primary or secondary calcium deficiency and vitamin D deficiency.