A-Cal D 500 mg + 200 IU Tablet, manufactured by ACME Laboratories Ltd., is a combination supplement containing Calcium Carbonate (equivalent to 500 mg elemental calcium) and Vitamin D₃ (Cholecalciferol 200 IU). This formulation is designed to support bone health by providing essential nutrients that aid in calcium absorption and bone mineralization. Calcium is vital for maintaining strong bones and teeth, while Vitamin D₃ enhances calcium absorption in the gastrointestinal tract and supports bone formation. The recommended dosage is typically 1 tablet twice daily, preferably taken with or just after meals to improve absorption. A-Cal D is commonly used in the prevention and treatment of conditions such as osteoporosis, osteomalacia, rickets, and hypoparathyroidism. It is also beneficial during periods of increased calcium and vitamin D requirements, such as pregnancy, lactation, and in individuals with limited sun exposure. As with any supplement, it should be used under the guidance of a healthcare professional to ensure safety and efficacy.