Shelcal Tablet is a widely used dietary supplement that combines calcium carbonate and vitamin D3 (cholecalciferol) to support bone health and address calcium deficiencies.Shelcal Tablet is a widely used dietary supplement that combines calcium carbonate and vitamin D3 (cholecalciferol) to support bone health and address calcium deficiencies.Shelcal Tablet is a widely used dietary supplement that combines calcium carbonate and vitamin D3 (cholecalciferol) to support bone health and address calcium deficiencies.