Calcium Carbonate (Vonwelt) 500mg Tablets, 100's are dietary supplements used to prevent or treat calcium deficiency in the body. Each tablet contains 500mg of calcium carbonate, which supports bone health, muscle function, and nerve transmission. Commonly recommended for individuals with increased calcium needs, such as the elderly, pregnant or nursing women, or those with osteoporosis, this bottle contains 100 tablets for regular use as directed by a healthcare professional.